Home » Archimedes archive » Acorn User » AU 1998-12.adf » Regulars » StarInfo/Kennedy/crumunch

StarInfo/Kennedy/crumunch

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Archimedes archive » Acorn User » AU 1998-12.adf » Regulars
Filename: StarInfo/Kennedy/crumunch
Read OK:
File size: 61B0 bytes
Load address: 0000
Exec address: 0000
File contents
   10REM Crunchers and Munchers. C. D. Kennedy
   20ON ERROR :PROCerror:END
   30SYS "OS_Byte",129,0,&FF TO ,version%
   40IF version% < &A5 THEN
   50MODE 31 :REM RiscOs version up to 3.1
   60ELSE
   70mode%=MODE:modelen%=24:ptr%=mode%+20
   80WHILE !ptr%<>-1
   90ptr%+=4:modelen%+=4
  100ENDWHILE
  110DIM modestore% modelen%
  120FOR i%=0 TO modelen%-4 STEP 4
  130modestore%!i%=mode%!i%
  140NEXT i%
  150MODE "X800,Y600,C16,EX1,EY1"
  160ENDIF
  170VDU5
  180PROCtut_com_colours
  190GCOL0,white%:CLG
  200MOUSE ON
  210NumberOfCycles%=48
  220divs%=100
  230DIM A(divs%-1,divs%-1),temp(divs%-1,divs%-1),totals(50,2)
  240MOUSE ON
  250REPEAT
  260REPEAT
  270GCOL pgrey%+128:CLG
  280PROChead3("CRUNCHERS AND MUNCHERS",450,1180,16,16,2,2,white%,dbrown%,lbrown%)
  290MOUSE TO 100,600
  300VDU 23,17,7,6,8;16;0;0;
  310GCOL0,dbrown%
  320MOVE 50,1100:PRINT"Imagine an area of land in which there are prey(blue) which live on vegetation, predators(red)"
  330MOVE 50,1060:PRINT"which live on the prey, and empty grassy spaces. Prey and predators are bisexual and breeding"
  340MOVE 50,1020:PRINT"does not occur for animals on there own. For simplicity all animals may be male or female."
  350MOVE 50,960:PRINT"Predators, prey and empty spaces are represented by red, blue and grey squares respectively in"
  360MOVE 50,920:PRINT"in a 100 x 100 matrix. Each little square(animal etc) is surrounded by 8 other squares. What"
  370MOVE 50,880:PRINT"happens to this square depends on the numbers of squares of each colour among this 8."
  380MOVE 50,820:PRINT"The 100 x 100 matrix is imagined to be surrounded  by 8 identical matrices, above, below,"
  390MOVE 50,780:PRINT"either side, and at the 4 corners. So the rules for the edges and corners are the same as"
  400MOVE 50,740:PRINT"the middle."
  410MOVE 50,680:PRINT"The parameters that determine behaviour are explained as you go along. Try the default settings"
  420MOVE 50,640:PRINT"first to get the feel of the thing. When things have settled down, you should see the predators"
  430MOVE 50,600:PRINT"surviving quite well at the edges of herds of prey. If you move to the second page, you will"
  440MOVE 50,560:PRINT"see a graph showing population against 'time'. Some settings may show quite complex and"
  450MOVE 50,520:PRINT"interacting population changes."
  460MOVE 50,460:PRINT"You might like to play around with the program to introduce other factors, or change the"
  470MOVE 50,420:PRINT"overall conditions, e.g., have have 2 sets of vegetarians competing for a limited food supply."
  480MOVE 50,360:PRINT"Have fun!"
  490GCOL0,red%
  500MOVE 50,250:PRINT "Now click Select with mouse on 'Default' or else select your own parameters:-"
  510RESTORE +6
  520FOR option%=0 TO 1
  530PROC_button(320+576*option%,120,50,mgrey%,dgrey%,vdgrey%)
  540READ colr%,op$
  550GCOL 0,colr%
  560PRINT op$
  570NEXT option%
  580DATA red%,"      Default"
  590DATA red%,"      Own parameters"
  600opt%=-1
  610optn%=-1
  620REPEAT
  630optn%+=1
  640PROC_mouse(320+576*optn%,120,50,optn%,opt%)
  650IF optn%=1 THEN optn%=-1
  660UNTIL opt%<>-1
  670CASE opt% OF
  680WHEN 0:choice%=1
  690PROC_default_parameters
  700WHEN 1:choice%=2
  710PROC_own_parameters
  720ENDCASE
  730UNTIL choice%=1 OR choice%=2
  740REPEAT
  750MOUSE TO 100,600
  760GCOL0,dbrown%
  770VDU 23,17,7,6,16;16;0;0;
  780MOVE 56,130:PRINT "Click SELECT on a 'Run' with mouse, else 'Quit'"
  790RESTORE +6
  800FOR option%=0 TO 1
  810PROC_button(320+576*option%,16,50,mgrey%,dgrey%,vdgrey%)
  820READ colr%,op$
  830GCOL 0,colr%
  840PRINT op$
  850NEXT option%
  860DATA blue%,"     1: Run"
  870DATA red%,"     2: Quit"
  880opt%=-1
  890optn%=-1
  900REPEAT
  910optn%+=1
  920PROC_mouse(320+576*optn%,16,50,optn%,opt%)
  930IF optn%=1 THEN optn%=-1
  940UNTIL opt%<>-1
  950CASE opt% OF
  960WHEN 0
  970PROCpopulations(1,NumberOfCycles%):quit%=FALSE
  980WHEN 1::quit%=TRUE
  990ENDCASE
 1000UNTIL opt%=0 OR opt%=1
 1010UNTIL quit%
 1020IF version% > &A4 THEN
 1030SYS "Wimp_SetMode",modestore%
 1040ENDIF
 1050END
 1060REM ***********************************************
 1070DEF PROCerror
 1080SYS "OS_Byte",129,0,&FF TO ,version%
 1090IF version% < &A5 THEN
 1100MODE 7
 1110ELSE
 1120SYS "Wimp_SetMode",modestore%
 1130ENDIF
 1140REPORT:PRINT" at line ";ERL:OSCLI("Set DeskEdit$ERL "+STR$(ERL))
 1150ENDPROC
 1160DEF PROC_default_parameters
 1170n1%=1:n2%=1:n3%=1:n4%=1:n5%=1:n6%=1
 1180pr%=10:pb%=20
 1190GCOL0,pgrey%:RECTANGLE FILL 0,0,1599,1142
 1200REPEAT
 1210MOUSE TO 100,600
 1220VDU 23,17,7,6,16;16;0;0;
 1230GCOL0,vdgrey%:MOVE 30,1120:PRINT "1,   Default parameters for space/dead areas:-"
 1240VDU 23,17,7,6,8;16;0;0;
 1250GCOL0,dbrown%
 1260MOVE 30,1060:PRINT "Each grey square is surrounded by 8 squares, each of which could be predator(red), prey(blue) or"
 1270MOVE 30,1020:PRINT"empty(grey). To breed, the minimum number of red cells in this group of 8 must be 2, but may have"
 1280MOVE 30,980:PRINT"to be greater if extra prey are needed to provide a viable breeding group."
 1290GCOL0,black%
 1300MOVE 30,930:PRINT"Minimum number of reds around grey space to allow breeding of more reds = ";n1%+1
 1310GCOL0,dbrown%:MOVE 30,850
 1320PRINT"Successful breeding is unlikely if there are no prey to sustain the young predators. So one or"
 1330MOVE 30,810:PRINT"more of the spaces must contain prey."
 1340GCOL0,black%
 1350MOVE 30,750:PRINT"Minimum number of blues around grey space to feed the young red= ";n2%+1
 1360GCOL0,dbrown%:MOVE 30,670
 1370PRINT"To breed, the minimum number of blue cells in this group of 8 must be 2, but may have to be"
 1380MOVE 30,630:PRINT"greater if extra prey are needed to provide a viable breeding group."
 1390GCOL0,black%
 1400MOVE 30,570:PRINT"Minimum number of blues around grey space to allow breeding of more blues= ";n3%+1
 1410GCOL0,dbrown%:MOVE 30,500
 1420PRINT"Successful breeding of prey(blues) is unlikely if there are predators(reds) around the grey space"
 1430MOVE 30,460:PRINT"so one can specify the maximum number of reds in the 8 surrounding spaces that can be toterated"
 1440MOVE 30,420:PRINT"that will still allow the prey(blues) to breed."
 1450
 1460GCOL0,black%
 1470MOVE 30,360:PRINT"Maximum number of reds around grey space that still permit the blues to breed= ";n4%-1
 1480REPEAT
 1490GCOL0,black%:MOVE 90,220
 1500PRINT"Click 'Select' on the box to view default parameters for ";
 1510GCOL0,red%:PRINT"red squares, ";:GCOL0,black%:PRINT"and ";
 1520GCOL0,blue%:PRINT"blue squares";:GCOL0,black%:PRINT"."
 1530RESTORE +4
 1540PROC_button(752,64,70,mgrey%,dgrey%,vdgrey%)
 1550READ colr%,op$
 1560GCOL 0,colr%
 1570PRINT op$
 1580DATA red%,""
 1590opt%=-1
 1600optn%=-1
 1610REPEAT
 1620optn%+=1
 1630PROC_mouse(752,64,70,optn%,opt%)
 1640IF optn%=0 THEN optn%=-1
 1650UNTIL opt%<>-1
 1660UNTIL opt%=0
 1670GCOL0,pgrey%:RECTANGLE FILL 0,0,1599,1140
 1680VDU 23,17,7,6,16;16;0;0;
 1690GCOL0,red%:MOVE 30,1120:PRINT "2,  Default parameters for red areas:-"
 1700VDU 23,17,7,6,8;16;0;0;
 1710GCOL0,dbrown%
 1720MOVE 30,1060:PRINT "Each red square is surrounded by 8 squares, each of which could be predator(red), prey(blue) or"
 1730MOVE 30,1020:PRINT"empty(grey). For the predators(reds) to survive they must have prey(blues) to eat. Here one can"
 1740MOVE 30,980:PRINT"specify the mimimum number of surrounding prey in order to ensure that one can be caught to eat."
 1750GCOL0,black%
 1760MOVE 30,920:PRINT"Minimum number of blues around red square to prevent red from starving = ";n5%
 1770GCOL0,dbrown%
 1780MOVE 30,840:PRINT "Predators(reds) can die of other causes, - illness, disease, accidents, old age - so we can"
 1790MOVE 30,800:PRINT"specify the average percentage of the red population that is likely to die in each cycle."
 1800GCOL0,black%
 1810MOVE 30,740:PRINT"Average percentage of 'accidental' red deaths per cycle = ";pr%
 1820VDU 23,17,7,6,16;16;0;0;
 1830GCOL0,blue%:MOVE 30,670:PRINT "3,  Default parameters for blue areas:-"
 1840VDU 23,17,7,6,8;16;0;0;
 1850GCOL0,dbrown%
 1860MOVE 30,620:PRINT "Prey(the blues) are likely to be killed if more than a specifiable number of predators(reds) "
 1870MOVE 30,580:PRINT"are in the surrounding 8 squares."
 1880GCOL0,black%
 1890MOVE 30,530:PRINT"Maximum number of reds around blue square without blue being eaten = ";n6%
 1900GCOL0,dbrown%
 1910MOVE 30,440:PRINT "Prey(blues) can die of other causes, - illness, disease, accidents, old age - so we can specify"
 1920MOVE 30,400:PRINT"the average percentage of the blue population that may die in each cycle from these causes."
 1930GCOL0,black%
 1940MOVE 30,340:PRINT"Average percentage of 'accidental' blue deaths per cycle = ";pb%
 1950ENDPROC
 1960DEF PROC_own_parameters
 1970GCOL0,pgrey%:RECTANGLE FILL 0,0,1599,1142
 1980REPEAT
 1990MOUSE TO 100,600
 2000VDU 23,17,7,6,16;16;0;0;
 2010GCOL0,vdgrey%:MOVE 30,1120:PRINT "1,  Processing space/dead areas:-"
 2020VDU 23,17,7,6,8;16;0;0;
 2030GCOL0,dbrown%
 2040MOVE 30,1060:PRINT "Each grey square is surrounded by 8 squares, each of which could be predator(red), prey(blue) or"
 2050MOVE 30,1020:PRINT"empty(grey). To breed, the minimum number of red cells in this group of 8 must be 2, but may have"
 2060MOVE 30,980:PRINT"to be greater if extra predators are needed to provide a viable breeding group."
 2070MOVE 30,940:PRINT"Select this minimum number below by clicking Select on a box below."
 2080RESTORE +6
 2090FOR option%=0 TO 3
 2100PROC_button(64+384*option%,832,50,mgrey%,dgrey%,vdgrey%)
 2110READ colr%,op$
 2120GCOL 0,colr%
 2130PRINT op$
 2140NEXT option%
 2150DATA red%,"     Minimum reds = 2"
 2160DATA red%,"     Minimum reds = 3"
 2170DATA red%,"     Minimum reds = 4"
 2180DATA red%,"     Minimum reds = 5"
 2190opt%=-1
 2200optn%=-1
 2210REPEAT
 2220optn%+=1
 2230PROC_mouse(64+384*optn%,832,50,optn%,opt%)
 2240IF optn%=3 THEN optn%=-1
 2250UNTIL opt%<>-1
 2260CASE opt% OF
 2270WHEN 0:n1%=1
 2280WHEN 1:n1%=2
 2290WHEN 2:n1%=3
 2300WHEN 3:n1%=4
 2310ENDCASE
 2320UNTIL n1%>0 AND n1%<5
 2330GCOL0,pgrey%:RECTANGLE FILL 0,824,1599,120:GCOL0,black%
 2340MOVE 30,920:PRINT"Minimum number of reds around grey space to allow breeding of more reds = ";n1%+1
 2350REPEAT
 2360GCOL0,dbrown%:MOVE 30,850
 2370PRINT"Successful breeding is unlikely if there are no prey to sustain the young predators. So one or"
 2380MOVE 30,810:PRINT"more of the spaces must contain prey. You can select this minimum number below."
 2390RESTORE +6
 2400FOR option%=0 TO 2
 2410PROC_button(144+464*option%,704,50,mgrey%,dgrey%,vdgrey%)
 2420READ colr%,op$
 2430GCOL 0,colr%
 2440PRINT op$
 2450NEXT option%
 2460DATA blue%,"     Minimum blues = 1"
 2470DATA blue%,"     Minimum blues = 2"
 2480DATA blue%,"     Minimum blues = 3"
 2490opt%=-1
 2500optn%=-1
 2510REPEAT
 2520optn%+=1
 2530PROC_mouse(144+464*optn%,704,50,optn%,opt%)
 2540IF optn%=2 THEN optn%=-1
 2550UNTIL opt%<>-1
 2560CASE opt% OF
 2570WHEN 0:n2%=0
 2580WHEN 1:n2%=1
 2590WHEN 2:n2%=2
 2600ENDCASE
 2610UNTIL n2%>-1 AND n2%<3
 2620GCOL0,pgrey%:RECTANGLE FILL 0,690,1599,80:GCOL0,black%
 2630MOVE 30,750:PRINT"Minimum number of blues around grey space to feed the young red= ";n2%+1
 2640REPEAT
 2650GCOL0,dbrown%:MOVE 30,670
 2660PRINT"To breed, the minimum number of blue cells in this group of 8 must be 2, but may have to be"
 2670MOVE 30,630:PRINT"greater if extra prey are needed to provide a viable breeding group."
 2680MOVE 30,590:PRINT"Select this minimum number below by clicking Select on a box below."
 2690RESTORE +6
 2700FOR option%=0 TO 3
 2710PROC_button(64+384*option%,480,50,mgrey%,dgrey%,vdgrey%)
 2720READ colr%,op$
 2730GCOL 0,colr%
 2740PRINT op$
 2750NEXT option%
 2760DATA blue%,"     Minimum blues = 2"
 2770DATA blue%,"     Minimum blues = 3"
 2780DATA blue%,"     Minimum blues = 4"
 2790DATA blue%,"     Minimum blues = 5"
 2800opt%=-1
 2810optn%=-1
 2820REPEAT
 2830optn%+=1
 2840PROC_mouse(64+384*optn%,480,50,optn%,opt%)
 2850IF optn%=3 THEN optn%=-1
 2860UNTIL opt%<>-1
 2870CASE opt% OF
 2880WHEN 0:n3%=1
 2890WHEN 1:n3%=2
 2900WHEN 2:n3%=3
 2910WHEN 3:n3%=4
 2920ENDCASE
 2930UNTIL n3%>0 AND n3%<5
 2940GCOL0,pgrey%:RECTANGLE FILL 0,470,1599,122:GCOL0,black%
 2950MOVE 30,560:PRINT"Minimum number of blues around grey space to allow breeding of more blues= ";n3%+1
 2960REPEAT
 2970GCOL0,dbrown%:MOVE 30,500
 2980PRINT"Successful breeding of prey(blues) is unlikely if there are predators(reds) around the grey space"
 2990MOVE 30,460:PRINT"so one can specify the maximum number of reds in the 8 surrounding spaces that can be toterated"
 3000MOVE 30,420:PRINT"that will still allow the prey(blues) to breed."
 3010RESTORE +6
 3020FOR option%=0 TO 2
 3030PROC_button(144+464*option%,320,50,mgrey%,dgrey%,vdgrey%)
 3040READ colr%,op$
 3050GCOL 0,colr%
 3060PRINT op$
 3070NEXT option%
 3080DATA red%,"     Maximum reds = 0"
 3090DATA red%,"     Maximum reds = 1"
 3100DATA red%,"     Maximum reds = 2"
 3110opt%=-1
 3120optn%=-1
 3130REPEAT
 3140optn%+=1
 3150PROC_mouse(144+464*optn%,320,50,optn%,opt%)
 3160IF optn%=2 THEN optn%=-1
 3170UNTIL opt%<>-1
 3180CASE opt% OF
 3190WHEN 0:n4%=1
 3200WHEN 1:n4%=2
 3210WHEN 2:n4%=3
 3220ENDCASE
 3230UNTIL n4%>0 AND n4%<4
 3240GCOL0,pgrey%:RECTANGLE FILL 0,305,1599,80:GCOL0,black%
 3250MOVE 30,360:PRINT"Maximum number of reds around grey space that still permit the blues to breed= ";n4%-1
 3260REPEAT
 3270GCOL0,black%:MOVE 90,220
 3280PRINT"Click 'Select' on the box below to specify parameters for ";
 3290GCOL0,red%:PRINT"red squares, ";:GCOL0,black%:PRINT"and ";
 3300GCOL0,blue%:PRINT"blue squares";:GCOL0,black%:PRINT"."
 3310RESTORE +4
 3320PROC_button(752,64,70,mgrey%,dgrey%,vdgrey%)
 3330READ colr%,op$
 3340GCOL 0,colr%
 3350PRINT op$
 3360DATA red%,""
 3370opt%=-1
 3380optn%=-1
 3390REPEAT
 3400optn%+=1
 3410PROC_mouse(752,64,70,optn%,opt%)
 3420IF optn%=0 THEN optn%=-1
 3430UNTIL opt%<>-1
 3440UNTIL opt%=0
 3450GCOL0,pgrey%:RECTANGLE FILL 0,0,1599,1140
 3460REPEAT
 3470MOUSE TO 100,600
 3480VDU 23,17,7,6,16;16;0;0;
 3490GCOL0,red%:MOVE 30,1120:PRINT "2,  Processing red areas:-"
 3500VDU 23,17,7,6,8;16;0;0;
 3510GCOL0,dbrown%
 3520MOVE 30,1060:PRINT "Each red square is surrounded by 8 squares, each of which could be predator(red), prey(blue) or"
 3530MOVE 30,1020:PRINT"empty(grey). For the predators(reds) to survive they must have prey(blues) to eat. Here one can"
 3540MOVE 30,980:PRINT"specify the mimimum number of surrounding prey in order to ensure that one can be caught to eat."
 3550MOVE 30,940:PRINT"Select this minimum number below by clicking Select on a box below."
 3560RESTORE +6
 3570FOR option%=0 TO 3
 3580PROC_button(64+384*option%,832,50,mgrey%,dgrey%,vdgrey%)
 3590READ colr%,op$
 3600GCOL 0,colr%
 3610PRINT op$
 3620NEXT option%
 3630DATA blue%,"     Minimum blues = 1"
 3640DATA blue%,"     Minimum blues = 2"
 3650DATA blue%,"     Minimum blues = 3"
 3660DATA blue%,"     Minimum blues = 4"
 3670opt%=-1
 3680optn%=-1
 3690REPEAT
 3700optn%+=1
 3710PROC_mouse(64+384*optn%,832,50,optn%,opt%)
 3720IF optn%=3 THEN optn%=-1
 3730UNTIL opt%<>-1
 3740CASE opt% OF
 3750WHEN 0:n5%=1
 3760WHEN 1:n5%=2
 3770WHEN 2:n5%=3
 3780WHEN 3:n5%=4
 3790ENDCASE
 3800UNTIL n5%>0 AND n5%<5
 3810GCOL0,pgrey%:RECTANGLE FILL 0,824,1599,120:GCOL0,black%
 3820MOVE 30,920:PRINT"Minimum number of blues around red square to prevent red from starving = ";n5%
 3830REPEAT
 3840MOUSE TO 100,600
 3850GCOL0,dbrown%
 3860MOVE 30,840:PRINT "Predators(reds) can die of other causes, - illness, disease, accidents, old age - so we can"
 3870MOVE 30,800:PRINT"specify the average percentage of the red population that is likely to die in each cycle."
 3880MOVE 30,760:PRINT"Choose this percentage by clicking with the mouse Select button on a box below."
 3890RESTORE +6
 3900FOR option%=0 TO 5
 3910PROC_button(80+256*option%,640,50,mgrey%,dgrey%,vdgrey%)
 3920READ colr%,op$
 3930GCOL 0,colr%
 3940PRINT op$
 3950NEXT option%
 3960DATA red%,"      10%"
 3970DATA red%,"      20%"
 3980DATA red%,"      30%"
 3990DATA red%,"      40%"
 4000DATA red%,"      50%"
 4010DATA red%,"      60%"
 4020opt%=-1
 4030optn%=-1
 4040REPEAT
 4050optn%+=1
 4060PROC_mouse(80+256*optn%,640,50,optn%,opt%)
 4070IF optn%=5 THEN optn%=-1
 4080UNTIL opt%<>-1
 4090CASE opt% OF
 4100WHEN 0:pr%=10
 4110WHEN 1:pr%=20
 4120WHEN 2:pr%=30
 4130WHEN 3:pr%=40
 4140WHEN 4:pr%=50
 4150WHEN 5:pr%=60
 4160ENDCASE
 4170UNTIL pr%>0 AND pr%<70
 4180GCOL0,pgrey%:RECTANGLE FILL 0,630,1599,135:GCOL0,black%
 4190MOVE 30,740:PRINT"Average percentage of 'accidental' red deaths per cycle = ";pr%
 4200REPEAT
 4210MOUSE TO 100,600
 4220VDU 23,17,7,6,16;16;0;0;
 4230GCOL0,blue%:MOVE 30,670:PRINT "3,  Processing blue areas:-"
 4240VDU 23,17,7,6,8;16;0;0;
 4250GCOL0,dbrown%
 4260MOVE 30,620:PRINT "Prey(the blues) are likely to be killed if more than a specifiable number of predators(reds) "
 4270MOVE 30,580:PRINT"are in the surrounding 8 squares."
 4280MOVE 30,540:PRINT"Choose this minimum number by clicking on a box below."
 4290RESTORE +6
 4300FOR option%=0 TO 3
 4310PROC_button(64+384*option%,432,50,mgrey%,dgrey%,vdgrey%)
 4320READ colr%,op$
 4330GCOL 0,colr%
 4340PRINT op$
 4350NEXT option%
 4360DATA red%,"     Maximum reds = 0"
 4370DATA red%,"     Maximum reds = 1"
 4380DATA red%,"     Maximum reds = 2"
 4390DATA red%,"     Maximum reds = 3"
 4400opt%=-1
 4410optn%=-1
 4420REPEAT
 4430optn%+=1
 4440PROC_mouse(64+384*optn%,432,50,optn%,opt%)
 4450IF optn%=3 THEN optn%=-1
 4460UNTIL opt%<>-1
 4470CASE opt% OF
 4480WHEN 0:n6%=0
 4490WHEN 1:n6%=1
 4500WHEN 2:n6%=2
 4510WHEN 3:n6%=3
 4520ENDCASE
 4530UNTIL n6%>-1 AND n6%<4
 4540GCOL0,pgrey%:RECTANGLE FILL 0,425,1599,120:GCOL0,black%
 4550MOVE 30,530:PRINT"Maximum number of reds around blue square without blue being eaten = ";n6%
 4560REPEAT
 4570GCOL0,dbrown%
 4580MOVE 30,440:PRINT "Prey(blues) can die of other causes, - illness, disease, accidents, old age - so we can specify"
 4590MOVE 30,400:PRINT"the average percentage of the blue population that may die in each cycle from these causes."
 4600MOVE 30,360:PRINT"Choose this percentage by clicking with the mouse Select button on a box below."
 4610RESTORE +6
 4620FOR option%=0 TO 5
 4630PROC_button(80+256*option%,240,50,mgrey%,dgrey%,vdgrey%)
 4640READ colr%,op$
 4650GCOL 0,colr%
 4660PRINT op$
 4670NEXT option%
 4680DATA blue%,"      10%"
 4690DATA blue%,"      20%"
 4700DATA blue%,"      30%"
 4710DATA blue%,"      40%"
 4720DATA blue%,"      50%"
 4730DATA blue%,"      60%"
 4740opt%=-1
 4750optn%=-1
 4760REPEAT
 4770optn%+=1
 4780PROC_mouse(80+256*optn%,240,50,optn%,opt%)
 4790IF optn%=5 THEN optn%=-1
 4800UNTIL opt%<>-1
 4810CASE opt% OF
 4820WHEN 0:pb%=10
 4830WHEN 1:pb%=20
 4840WHEN 2:pb%=30
 4850WHEN 3:pb%=40
 4860WHEN 4:pb%=50
 4870WHEN 5:pb%=60
 4880ENDCASE
 4890UNTIL pb%>0 AND pb%<70
 4900GCOL0,pgrey%:RECTANGLE FILL 0,230,1599,135:GCOL0,black%
 4910MOVE 30,340:PRINT"Average percentage of 'accidental' blue deaths per cycle = ";pb%
 4920ENDPROC
 4930DEF PROCtut_com_colours
 4940pgrey%     =  0
 4950dbrown%    =  1
 4960blue%      =  4
 4970red%       =  5
 4980white%     =  7
 4990black%     =  8
 5000mgrey%     =  9
 5010dgrey%     = 10
 5020vdgrey%    = 11
 5030lbrown%    = 12
 5040mgreen%    = 14
 5050COLOUR blue%,        0,  0,255
 5060COLOUR red%,       255,  0,  0
 5070COLOUR black%,       0,  0,  0
 5080COLOUR white%,     255,255,255
 5090COLOUR pgrey%,     200,200,200
 5100COLOUR mgrey%,     170,170,170
 5110COLOUR dgrey%,     140,140,140
 5120COLOUR vdgrey%,     70, 70, 70
 5130COLOUR lbrown%,    220,100, 30
 5140COLOUR mgreen%,      0,120,  0
 5150COLOUR dbrown%,    120, 60, 60
 5160COLOUR 15,         112,255,112
 5170ENDPROC
 5180DEF PROChead3(hd$,xs%,ys%,vdx%,vdy%,xshift%,yshift%,ulcol%,drcol%,tcol%)
 5190VDU 23,17,7,6,vdx%;vdy%;0;0;
 5200GCOL0,ulcol%:MOVE xs%-xshift%,ys%+yshift%:PRINT hd$
 5210GCOL0,drcol%:MOVE xs%+xshift%,ys%-yshift%:PRINT hd$
 5220GCOL0,tcol%:MOVE xs%,ys%:PRINT hd$
 5230ENDPROC
 5240DEF PROCtutborder(x%,y%,w%,h%)
 5250gcol%=8:dx%=0
 5260GCOL 0,pgrey%
 5270RECTANGLE FILL x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%
 5280dx% +=4
 5290REPEAT
 5300gcol% +=1
 5310GCOL 0,gcol%
 5320RECTANGLE FILL x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%
 5330dx% +=4
 5340UNTIL gcol%=11
 5350REPEAT
 5360gcol% -=1:dx% +=4
 5370GCOL 0,gcol%
 5380RECTANGLE FILL x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%
 5390UNTIL gcol%=9
 5400dx% +=4:GCOL 0,pgrey%
 5410RECTANGLE FILL x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%
 5420VDU 23,17,7,6,16;16;0;0;
 5430ENDPROC
 5440DEF PROCpaging(pages%,RETURN nowpage%)
 5450RESTORE +6
 5460FOR option%=0 TO 2
 5470PROC_button(80+544*option%,32,52,mgrey%,dgrey%,vdgrey%)
 5480READ colr%,op$
 5490GCOL 0,colr%
 5500PRINT op$
 5510NEXT option%
 5520DATA col_menu%, "   Menu"
 5530DATA col_back%, "   <<<<< Back"
 5540DATA col_on%,   "   On >>>>>"
 5550opt%=-1
 5560optn%=-1
 5570REPEAT
 5580optn%+=1
 5590PROC_mouse(80+544*optn%,32,52,optn%,opt%)
 5600IF optn%=2 THEN optn%=-1
 5610UNTIL opt%<>-1
 5620CASE opt% OF
 5630WHEN 0
 5640REM leave loop, return to menu
 5650WHEN 1
 5660IF nowpage%>1 THEN nowpage%-=1
 5670WHEN 2
 5680IF nowpage%<pages% THEN nowpage%+=1
 5690ENDCASE
 5700MOUSE RECTANGLE 0,0,1599,1199
 5710ENDPROC
 5720DEF PROCpopulations(nowpage%,cycles%)
 5730LOCAL pages%
 5740LOCAL col_menu%,col_back%,col_on%
 5750PROCtut_com_colours
 5760CLG
 5770pages%=2:col_menu%=lbrown%
 5780REPEAT
 5790col_back%=black%:col_on%=black%
 5800IF nowpage%=1      col_back%=mgrey%
 5810IF nowpage%=pages% col_on%  =mgrey%
 5820CASE nowpage% OF
 5830WHEN 1:PROCpops_page1(pages%,nowpage%,cycles%)
 5840WHEN 2:PROCpops_page2(pages%,nowpage%)
 5850ENDCASE
 5860PROCpaging(pages%,nowpage%)
 5870UNTIL opt%=0:REM leave loop, return to menu
 5880ENDPROC
 5890DEF PROCpops_page1(pages%,nowpage%,cycles%)
 5900LOCAL ox%,oy%,lenx%,leny%,divs%,dummy,key$
 5910LOCAL j%,k%
 5920PROCtutborder(0,120,1599,1079)
 5930PROCtutborder(0,0,1599,124)
 5940VDU23,17,7,6,8;16;0;0;
 5950GCOL0,blue%:MOVE 74,78
 5960PRINT"Hold down key ""S"" to stop cycles(max.=48),  then click 'On' for graph or 'Menu' to restart"
 5970MOUSE TO 1100,200
 5980VDU23,17,7,6,8;8;0;0;
 5990GCOL0,black%:MOVE 50,1160:PRINT"Cycle   Reds    Blues   Spaces"
 6000VDU23,17,7,6,8;8;0;0;
 6010ox%=557:oy%=1160:lenx%=1000:leny%=lenx%:divs%=100
 6020GCOL0,mgrey%
 6030FOR i%=0 TO divs%
 6040MOVE ox%+i%*lenx%/divs%,oy%:DRAW BY 0,-leny%
 6050NEXT i%
 6060FOR i%=0 TO divs%
 6070MOVE ox%,oy%-i%*leny%/divs%:DRAW BY lenx%,0
 6080NEXT i%
 6090A()=0:redpop%=0:bluepop%=0:dead%=0:cycle%=0
 6100temp()=0:totals()=0
 6110dummy=RND(-TIME)
 6120FOR j%=0 TO divs%-1
 6130FOR k%=0 TO divs%-1
 6140cell%=RND(300)
 6150IF cell%>=250 A(j%,k%)=10:REM red cells
 6160IF cell%>=50 AND cell%<250 A(j%,k%)=1:REM blue cells
 6170IF cell%<50 A(j%,k%)=0:REM dead or grey cells
 6180IF A(j%,k%)=10 redpop%+=1
 6190IF A(j%,k%)=1 bluepop%+=1
 6200IF A(j%,k%)=0 dead%+=1
 6210NEXT k%
 6220NEXT j%
 6230totals(0,0)=redpop%:totals(0,1)=bluepop%:totals(0,2)=dead%
 6240GCOL0,black%
 6250@%=&00000505:ypos%=1130:xcycle%=20:xred%=163:xblue%=295:xdead%=430
 6260MOVE xcycle%,ypos%:PRINTcycle%:MOVExred%,ypos%:PRINTredpop%
 6270MOVExblue%,ypos%:PRINTbluepop%:MOVExdead%,ypos%:PRINTdead%
 6280FOR j%=0 TO divs%-1
 6290FOR k%=0 TO divs%-1
 6300IF A(j%,k%) = 10 THEN
 6310GCOL0,red%
 6320CIRCLE FILL ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
 6330ENDIF
 6340IF A(j%,k%) = 1 THEN
 6350GCOL0,blue%
 6360CIRCLE FILL ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
 6370ENDIF
 6380IF A(j%,k%) = 0 THEN
 6390GCOL0,dgrey%
 6400CIRCLE FILL ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
 6410ENDIF
 6420NEXT k%
 6430NEXT j%
 6440cycle%=1:key$="G"
 6450WHILE cycle%<=cycles% AND key$<>"S"
 6460redpop%=0:bluepop%=0:dead%=0
 6470key$=INKEY$(5)
 6480*FX15,1
 6490FOR j%=0 TO divs%-1
 6500FOR k%=0 TO divs%-1
 6510CASE TRUE OF
 6520WHEN j%<>0 AND k%<>0 AND j%<>divs%-1 AND k%<>divs%-1:REM all except edges
 6530sum%=A(j%-1,k%-1)+A(j%-1,k%)+A(j%-1,k%+1)+A(j%,k%-1)+A(j%,k%+1)+A(j%+1,k%-1)+A(j%+1,k%)+A(j%+1,k%+1)
 6540WHEN j%=0 AND k%<>0 AND k%<>divs%-1
 6550sum%=A(divs%-1,k%-1)+A(divs%-1,k%)+A(divs%-1,k%+1)+A(0,k%-1)+A(0,k%+1)+A(1,k%-1)+A(1,k%)+A(1,k%+1)
 6560WHEN j%=divs%-1 AND k%<>0 AND k%<>divs%-1
 6570sum%=A(divs%-2,k%-1)+A(divs%-2,k%)+A(divs%-2,k%+1)+A(divs%-1,k%-1)+A(divs%-1,k%+1)+A(0,k%-1)+A(0,k%)+A(0,k%+1)
 6580WHEN k%=0 AND j%<>0 AND j%<>divs%-1
 6590sum%=A(j%-1,divs%-1)+A(j%-1,0)+A(j%-1,1)+A(j%,divs%-1)+A(j%,1)+A(j%+1,divs%-1)+A(j%+1,0)+A(j%+1,1)
 6600WHEN k%=divs%-1 AND j%<>0 AND j%<>divs%-1
 6610sum%=A(j%-1,divs%-2)+A(j%-1,divs%-1)+A(j%-1,0)+A(j%,divs%-2)+A(j%,0)+A(j%+1,divs%-2)+A(j%+1,divs%-1)+A(j%+1,0)
 6620WHEN j%=0 AND k%=0
 6630sum%=A(divs%-1,divs%-1)+A(divs%-1,0)+A(divs%-1,1)+A(0,divs%-1)+A(0,1)+A(1,divs%-1)+A(1,0)+A(1,1)
 6640WHEN j%=0 AND k%=divs%-1
 6650sum%=A(divs%-1,divs%-2)+A(divs%-1,divs%-1)+A(divs%-1,0)+A(0,divs%-2)+A(0,0)+A(1,divs%-2)+A(1,divs%-1)+A(1,0)
 6660WHEN j%=divs%-1 AND k%=0
 6670sum%=A(divs%-2,divs%-1)+A(divs%-2,0)+A(divs%-2,1)+A(divs%-1,divs%-1)+A(divs%-1,1)+A(0,divs%-1)+A(0,0)+A(0,1)
 6680WHEN j%=divs%-1 AND k%=divs%-1
 6690sum%=A(divs%-2,divs%-2)+A(divs%-2,divs%-1)+A(divs%-2,0)+A(divs%-1,divs%-2)+A(divs%-1,0)+A(0,divs%-2)+A(0,divs%-1)+A(0,0)
 6700ENDCASE
 6710redsum%=INT(sum%/10):bluesum%=sum%-10*redsum%
 6720deadsum%=8-redsum%-bluesum%
 6730REM dead cell processing-
 6740IF A(j%,k%)=0 THEN
 6750temp(j%,k%)=0
 6760IF redsum%>n1% AND bluesum%>n2% temp(j%,k%)=10
 6770IF bluesum%>n3% AND redsum%<n4% temp(j%,k%)=1
 6780ENDIF
 6790REM red cell processing-
 6800IF A(j%,k%)=10 THEN
 6810temp(j%,k%)=10
 6820IF bluesum%<n5% temp(j%,k%)=0
 6830dummy=RND(-TIME):IF RND(100)>(100-pr%) temp(j%,k%)=0
 6840ENDIF
 6850REM blue cell processing-
 6860IF A(j%,k%)=1 THEN
 6870temp(j%,k%)=1
 6880IF redsum%>n6% temp(j%,k%)=0
 6890dummy=RND(-TIME):IF RND(100)>(100-pb%) temp(j%,k%)=0
 6900ENDIF
 6910NEXT k%
 6920NEXT j%
 6930A()=temp():temp()=0
 6940FOR j%=0 TO divs%-1
 6950FOR k%=0 TO divs%-1
 6960IF A(j%,k%) = 10 THEN
 6970GCOL0,red%:redpop%+=1
 6980CIRCLE FILL ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
 6990ENDIF
 7000IF A(j%,k%) = 1 THEN
 7010GCOL0,blue%:bluepop%+=1
 7020CIRCLE FILL ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
 7030ENDIF
 7040IF A(j%,k%) = 0 THEN
 7050GCOL0,dgrey%:dead%+=1
 7060CIRCLE FILL ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
 7070ENDIF
 7080NEXT k%
 7090NEXT j%
 7100GCOL0,black%:MOVE xcycle%,ypos%-20*cycle%:PRINTcycle%
 7110MOVExred%,ypos%-20*cycle%:PRINTredpop%
 7120MOVExblue%,ypos%-20*cycle%:PRINTbluepop%
 7130MOVExdead%,ypos%-20*cycle%:PRINTdead%
 7140totals(cycle%,0)=redpop%
 7150totals(cycle%,1)=bluepop%
 7160totals(cycle%,2)=dead%
 7170cycle%+=1
 7180key$=INKEY$(5):IF key$="s" key$="S"
 7190*FX15,1
 7200ENDWHILE
 7210*FX15,1
 7220cyclesrun%=cycle%-1
 7230@%=&0000090A
 7240PROCtutborder(0,0,1599,124)
 7250ENDPROC
 7260DEF PROCpops_page2(pages%,nowpage%)
 7270LOCAL xo%,yo%,xl%,yl%
 7280PROCtutborder(0,120,1599,1079)
 7290PROCtutborder(0,0,1599,124)
 7300PROChead3("CRUNCHERS AND MUNCHERS",450,1160,16,16,2,2,white%,dbrown%,lbrown%)
 7310MOUSE TO 1100,200
 7320GCOL 0,black%
 7330MOVE 1180,190:PRINT "Page ";nowpage%;" of ";pages%
 7340xo%=320:yo%=280:xl%=1200:yl%=700
 7350GCOL0,mgrey%:RECTANGLE FILL xo%,yo%,xl%,yl%
 7360GCOL0,white%
 7370FOR i%=0 TO 50
 7380MOVE xo%+i%*xl%/50,yo%:DRAW BY 0,yl%
 7390NEXT i%
 7400FOR i%=0 TO 50
 7410MOVE xo%,yo%+i%*yl%/50:DRAW BY xl%,0
 7420NEXT i%
 7430GCOL0,black%:MOVE xo%,yo%:DRAW BY xl%,0:DRAW BY 0,yl%
 7440DRAW BY -xl%,0:DRAW BY 0,-yl%
 7450VDU23,17,7,6,8;8;0;0;
 7460@%=&00000902
 7470FOR i%=0 TO 50 STEP 10
 7480MOVE xo%+i%*xl%/50,yo%:DRAW BY 0,yl%
 7490MOVE xo%+i%*xl%/50-15,yo%-12:PRINT i%
 7500NEXT i%
 7510@%=&00000905
 7520FOR i%=0 TO 50 STEP 10
 7530MOVE xo%,yo%+i%*yl%/50:DRAW BY xl%,0
 7540MOVE xo%-90,yo%+i%*yl%/50+5:PRINT 200*i%
 7550NEXT i%
 7560@%=&0000090A
 7570VDU23,17,7,6,8;16;0;0;
 7580MOVE 880,250:PRINT"Cycle"
 7590MOVE50,640:PRINT"Populations"
 7600GCOL0,dgrey%:MOVE xo%+60,yo%+yl%+80:PRINT"No creatures_______"
 7610GCOL0,red%:MOVE xo%+510,yo%+yl%+80:PRINT"Predators_______"
 7620GCOL0,blue%:MOVE xo%+960,yo%+yl%+80:PRINT"Prey_______"
 7630FOR i%=0 TO cyclesrun%-1
 7640GCOL0,red%:MOVE xo%+i%*xl%/50,yo%+totals(i%,0)*yl%/10000
 7650DRAW xo%+(i%+1)*xl%/50,yo%+totals(i%+1,0)*yl%/10000
 7660GCOL0,blue%:MOVE xo%+i%*xl%/50,yo%+totals(i%,1)*yl%/10000
 7670DRAW xo%+(i%+1)*xl%/50,yo%+totals(i%+1,1)*yl%/10000
 7680GCOL0,vdgrey%:MOVE xo%+i%*xl%/50,yo%+totals(i%,2)*yl%/10000
 7690DRAW xo%+(i%+1)*xl%/50,yo%+totals(i%+1,2)*yl%/10000
 7700NEXT i%
 7710GCOL0,black%
 7720PROCtutborder(0,0,1599,124)
 7730ENDPROC
 7740DEF PROC_button(xpos,ypos,height,colcentre%,colborder%,col_line%)
 7750LOCAL corner,border,len,xp,yp
 7760LOCAL ht,ln,count%
 7770len=4*height/3
 7780ht=height
 7790ln=len
 7800xp=xpos
 7810yp=ypos
 7820corner=height/5
 7830border=height/10
 7840FOR count% = 1 TO 4
 7850CASE count% OF
 7860WHEN 1
 7870GCOL 0,colborder%
 7880WHEN 2
 7890GCOL 0,colcentre%
 7900WHEN 3
 7910GCOL 0,col_line%
 7920xpos=xp
 7930ypos=yp
 7940height=ht
 7950len=ln
 7960ENDCASE
 7970MOVE xpos+corner,ypos
 7980PLOT 1,len-corner,0
 7990MOVE BY corner,corner
 8000PLOT 1,0,height-corner
 8010MOVE BY -corner,corner
 8020PLOT 1,-len+corner,0
 8030MOVE BY -corner,-corner
 8040PLOT 1,0,-height+corner
 8050MOVE BY corner,0
 8060MOVE BY -corner,0
 8070PLOT 161,corner,-corner
 8080MOVE BY len-corner,corner
 8090MOVE BY 0,-corner
 8100PLOT 161,corner,corner
 8110MOVE BY -corner,height-corner
 8120MOVE BY corner,0
 8130PLOT 161,-corner,corner
 8140MOVE BY -len+corner,-corner
 8150MOVE BY 0,corner
 8160PLOT 161,-corner,-corner
 8170CASE count% OF
 8180WHEN 1
 8190PLOT &8D,xpos+len/2,ypos+height/2
 8200WHEN 2
 8210PLOT &8D,xpos+len/2,ypos+height/2
 8220ENDCASE
 8230xpos=xpos+border
 8240ypos=ypos+border
 8250height=height-2*border
 8260len=len-2*border
 8270NEXT count%
 8280ENDPROC
 8290DEF PROC_mouse(xpos,ypos,height,option%,RETURN opt%)
 8300LOCAL len,x,y,buttons%
 8310len=4*height/3
 8320MOUSE x,y,buttons%
 8330IF buttons%=4 THEN
 8340IF x>xpos AND x<xpos+len THEN
 8350IF y>ypos AND y<ypos+height THEN
 8360opt%=option%
 8370ELSE opt%=-1
 8380ENDIF
 8390ENDIF
 8400ENDIF
 8410ENDPROC
 8420

+� Crunchers and Munchers. C. D. Kennedy
� � :�error:�
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(� version% < &A5 �
2$� 31 :� RiscOs version up to 3.1
<�
F%mode%=�:modelen%=24:ptr%=mode%+20
Pȕ !ptr%<>-1
Zptr%+=4:modelen%+=4
d�
n� modestore% modelen%
x� i%=0 � modelen%-4 � 4
�modestore%!i%=mode%!i%
�� i%
�� "X800,Y600,C16,EX1,EY1"
��
��5
��tut_com_colours
��0,white%:�
�ȗ �
�NumberOfCycles%=48
�
divs%=100
�;� A(divs%-1,divs%-1),temp(divs%-1,divs%-1),totals(50,2)
�ȗ �
��
�
� pgrey%+128:�
N�head3("CRUNCHERS AND MUNCHERS",450,1180,16,16,2,2,white%,dbrown%,lbrown%)
"ȗ � 100,600
,� 23,17,7,6,8;16;0;0;
6�0,dbrown%
@o� 50,1100:�"Imagine an area of land in which there are prey(blue) which live on vegetation, predators(red)"
Jn� 50,1060:�"which live on the prey, and empty grassy spaces. Prey and predators are bisexual and breeding"
Tk� 50,1020:�"does not occur for animals on there own. For simplicity all animals may be male or female."
^n� 50,960:�"Predators, prey and empty spaces are represented by red, blue and grey squares respectively in"
hl� 50,920:�"in a 100 x 100 matrix. Each little square(animal etc) is surrounded by 8 other squares. What"
re� 50,880:�"happens to this square depends on the numbers of squares of each colour among this 8."
|i� 50,820:�"The 100 x 100 matrix is imagined to be surrounded  by 8 identical matrices, above, below,"
�i� 50,780:�"either side, and at the 4 corners. So the rules for the edges and corners are the same as"
�� 50,740:�"the middle."
�o� 50,680:�"The parameters that determine behaviour are explained as you go along. Try the default settings"
�o� 50,640:�"first to get the feel of the thing. When things have settled down, you should see the predators"
�l� 50,600:�"surviving quite well at the edges of herds of prey. If you move to the second page, you will"
�g� 50,560:�"see a graph showing population against 'time'. Some settings may show quite complex and"
�/� 50,520:�"interacting population changes."
�h� 50,460:�"You might like to play around with the program to introduce other factors, or change the"
�n� 50,420:�"overall conditions, e.g., have have 2 sets of vegetarians competing for a limited food supply."
�� 50,360:�"Have fun!"
��0,red%
�^� 50,250:� "Now click Select with mouse on 'Default' or else select your own parameters:-"
�� +6
� option%=0 � 1
:�_button(320+576*option%,120,50,mgrey%,dgrey%,vdgrey%)
� colr%,op$
&
� 0,colr%
0	� op$
:
� option%
D� red%,"      Default"
N!� red%,"      Own parameters"
Xopt%=-1
boptn%=-1
l�
voptn%+=1
�,�_mouse(320+576*optn%,120,50,optn%,opt%)
�� optn%=1 � optn%=-1
�� opt%<>-1
�
Ȏ opt% �
�� 0:choice%=1
��_default_parameters
�� 1:choice%=2
��_own_parameters
��
�� choice%=1 � choice%=2
��
�ȗ � 100,600
��0,dbrown%
� 23,17,7,6,16;16;0;0;
@� 56,130:� "Click SELECT on a 'Run' with mouse, else 'Quit'"
� +6
 � option%=0 � 1
*9�_button(320+576*option%,16,50,mgrey%,dgrey%,vdgrey%)
4� colr%,op$
>
� 0,colr%
H	� op$
R
� option%
\� blue%,"     1: Run"
f� red%,"     2: Quit"
popt%=-1
zoptn%=-1
��
�optn%+=1
�+�_mouse(320+576*optn%,16,50,optn%,opt%)
�� optn%=1 � optn%=-1
�� opt%<>-1
�
Ȏ opt% �
�� 0
�+�populations(1,NumberOfCycles%):quit%=�
�� 1::quit%=�
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�� opt%=0 � opt%=1
�� quit%
�� version% > &A4 �
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�
$5� ***********************************************
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8&ș "OS_Byte",129,0,&FF � ,version%
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L� 7
V�
` ș "Wimp_SetMode",modestore%
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t0�:�" at line ";�:�("Set DeskEdit$ERL "+�(�))
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�� �_default_parameters
�'n1%=1:n2%=1:n3%=1:n4%=1:n5%=1:n6%=1
�pr%=10:pb%=20
�!�0,pgrey%:ȓ Ȑ 0,0,1599,1142
��
�ȗ � 100,600
�� 23,17,7,6,16;16;0;0;
�K�0,vdgrey%:� 30,1120:� "1,   Default parameters for space/dead areas:-"
�� 23,17,7,6,8;16;0;0;
��0,dbrown%
�r� 30,1060:� "Each grey square is surrounded by 8 squares, each of which could be predator(red), prey(blue) or"
�r� 30,1020:�"empty(grey). To breed, the minimum number of red cells in this group of 8 must be 2, but may have"
Z� 30,980:�"to be greater if extra prey are needed to provide a viable breeding group."


�0,black%
`� 30,930:�"Minimum number of reds around grey space to allow breeding of more reds = ";n1%+1
�0,dbrown%:� 30,850
(e�"Successful breeding is unlikely if there are no prey to sustain the young predators. So one or"
25� 30,810:�"more of the spaces must contain prey."
<
�0,black%
FW� 30,750:�"Minimum number of blues around grey space to feed the young red= ";n2%+1
P�0,dbrown%:� 30,670
Zb�"To breed, the minimum number of blue cells in this group of 8 must be 2, but may have to be"
dT� 30,630:�"greater if extra prey are needed to provide a viable breeding group."
n
�0,black%
xa� 30,570:�"Minimum number of blues around grey space to allow breeding of more blues= ";n3%+1
��0,dbrown%:� 30,500
�h�"Successful breeding of prey(blues) is unlikely if there are predators(reds) around the grey space"
�o� 30,460:�"so one can specify the maximum number of reds in the 8 surrounding spaces that can be toterated"
�?� 30,420:�"that will still allow the prey(blues) to breed."
�
�
�0,black%
�e� 30,360:�"Maximum number of reds around grey space that still permit the blues to breed= ";n4%-1
��
��0,black%:� 90,220
�A�"Click 'Select' on the box to view default parameters for ";
�0�0,red%:�"red squares, ";:�0,black%:�"and ";
�,�0,blue%:�"blue squares";:�0,black%:�"."
�� +4
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@optn%=-1
J�
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h� optn%=0 � optn%=-1
r� opt%<>-1
|� opt%=0
�!�0,pgrey%:ȓ Ȑ 0,0,1599,1140
�� 23,17,7,6,16;16;0;0;
�@�0,red%:� 30,1120:� "2,  Default parameters for red areas:-"
�� 23,17,7,6,8;16;0;0;
��0,dbrown%
�q� 30,1060:� "Each red square is surrounded by 8 squares, each of which could be predator(red), prey(blue) or"
�p� 30,1020:�"empty(grey). For the predators(reds) to survive they must have prey(blues) to eat. Here one can"
�p� 30,980:�"specify the mimimum number of surrounding prey in order to ensure that one can be caught to eat."
�
�0,black%
�]� 30,920:�"Minimum number of blues around red square to prevent red from starving = ";n5%
��0,dbrown%
�l� 30,840:� "Predators(reds) can die of other causes, - illness, disease, accidents, old age - so we can"
�i� 30,800:�"specify the average percentage of the red population that is likely to die in each cycle."

�0,black%
N� 30,740:�"Average percentage of 'accidental' red deaths per cycle = ";pr%
� 23,17,7,6,16;16;0;0;
&A�0,blue%:� 30,670:� "3,  Default parameters for blue areas:-"
0� 23,17,7,6,8;16;0;0;
:�0,dbrown%
Dn� 30,620:� "Prey(the blues) are likely to be killed if more than a specifiable number of predators(reds) "
N1� 30,580:�"are in the surrounding 8 squares."
X
�0,black%
bY� 30,530:�"Maximum number of reds around blue square without blue being eaten = ";n6%
l�0,dbrown%
vp� 30,440:� "Prey(blues) can die of other causes, - illness, disease, accidents, old age - so we can specify"
�k� 30,400:�"the average percentage of the blue population that may die in each cycle from these causes."
�
�0,black%
�O� 30,340:�"Average percentage of 'accidental' blue deaths per cycle = ";pb%
��
�� �_own_parameters
�!�0,pgrey%:ȓ Ȑ 0,0,1599,1142
��
�ȗ � 100,600
�� 23,17,7,6,16;16;0;0;
�>�0,vdgrey%:� 30,1120:� "1,  Processing space/dead areas:-"
�� 23,17,7,6,8;16;0;0;
��0,dbrown%
�r� 30,1060:� "Each grey square is surrounded by 8 squares, each of which could be predator(red), prey(blue) or"
r� 30,1020:�"empty(grey). To breed, the minimum number of red cells in this group of 8 must be 2, but may have"
_� 30,980:�"to be greater if extra predators are needed to provide a viable breeding group."
S� 30,940:�"Select this minimum number below by clicking Select on a box below."
 � +6
*� option%=0 � 3
49�_button(64+384*option%,832,50,mgrey%,dgrey%,vdgrey%)
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H
� 0,colr%
R	� op$
\
� option%
f"� red%,"     Minimum reds = 2"
p"� red%,"     Minimum reds = 3"
z"� red%,"     Minimum reds = 4"
�"� red%,"     Minimum reds = 5"
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�optn%=-1
��
�optn%+=1
�+�_mouse(64+384*optn%,832,50,optn%,opt%)
�� optn%=3 � optn%=-1
�� opt%<>-1
�
Ȏ opt% �
�
� 0:n1%=1
�
� 1:n1%=2
�
� 2:n1%=3
�
� 3:n1%=4
	�
	� n1%>0 � n1%<5
	,�0,pgrey%:ȓ Ȑ 0,824,1599,120:�0,black%
	$`� 30,920:�"Minimum number of reds around grey space to allow breeding of more reds = ";n1%+1
	.�
	8�0,dbrown%:� 30,850
	Be�"Successful breeding is unlikely if there are no prey to sustain the young predators. So one or"
	L_� 30,810:�"more of the spaces must contain prey. You can select this minimum number below."
	V� +6
	`� option%=0 � 2
	j:�_button(144+464*option%,704,50,mgrey%,dgrey%,vdgrey%)
	t� colr%,op$
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� 0,colr%
	�	� op$
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� option%
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	�$� blue%,"     Minimum blues = 2"
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(�
2� n2%>-1 � n2%<3
<+�0,pgrey%:ȓ Ȑ 0,690,1599,80:�0,black%
FW� 30,750:�"Minimum number of blues around grey space to feed the young red= ";n2%+1
P�
Z�0,dbrown%:� 30,670
db�"To breed, the minimum number of blue cells in this group of 8 must be 2, but may have to be"
nT� 30,630:�"greater if extra prey are needed to provide a viable breeding group."
xS� 30,590:�"Select this minimum number below by clicking Select on a box below."
�� +6
�� option%=0 � 3
�9�_button(64+384*option%,480,50,mgrey%,dgrey%,vdgrey%)
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�
� 0,colr%
�	� op$
�
� option%
�$� blue%,"     Minimum blues = 2"
�$� blue%,"     Minimum blues = 3"
�$� blue%,"     Minimum blues = 4"
�$� blue%,"     Minimum blues = 5"
�opt%=-1
�optn%=-1
�
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"� optn%=3 � optn%=-1
,� opt%<>-1
6
Ȏ opt% �
@
� 0:n3%=1
J
� 1:n3%=2
T
� 2:n3%=3
^
� 3:n3%=4
h�
r� n3%>0 � n3%<5
|,�0,pgrey%:ȓ Ȑ 0,470,1599,122:�0,black%
�a� 30,560:�"Minimum number of blues around grey space to allow breeding of more blues= ";n3%+1
��
��0,dbrown%:� 30,500
�h�"Successful breeding of prey(blues) is unlikely if there are predators(reds) around the grey space"
�o� 30,460:�"so one can specify the maximum number of reds in the 8 surrounding spaces that can be toterated"
�?� 30,420:�"that will still allow the prey(blues) to breed."
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�� option%=0 � 2
�:�_button(144+464*option%,320,50,mgrey%,dgrey%,vdgrey%)
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�
� 0,colr%
�	� op$
�
� option%
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.$� blue%,"     Minimum blues = 1"
8$� blue%,"     Minimum blues = 2"
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`optn%=-1
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toptn%+=1
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�
Ȏ opt% �
�
� 0:n5%=1
�
� 1:n5%=2
�
� 2:n5%=3
�
� 3:n5%=4
��
�� n5%>0 � n5%<5
�,�0,pgrey%:ȓ Ȑ 0,824,1599,120:�0,black%
�]� 30,920:�"Minimum number of blues around red square to prevent red from starving = ";n5%
��
ȗ � 100,600

�0,dbrown%
l� 30,840:� "Predators(reds) can die of other causes, - illness, disease, accidents, old age - so we can"
i� 30,800:�"specify the average percentage of the red population that is likely to die in each cycle."
(_� 30,760:�"Choose this percentage by clicking with the mouse Select button on a box below."
2� +6
<� option%=0 � 5
F9�_button(80+256*option%,640,50,mgrey%,dgrey%,vdgrey%)
P� colr%,op$
Z
� 0,colr%
d	� op$
n
� option%
x� red%,"      10%"
�� red%,"      20%"
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�� red%,"      60%"
�opt%=-1
�optn%=-1
��
�optn%+=1
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�
Ȏ opt% �
� 0:pr%=10
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"� 3:pr%=40
,� 4:pr%=50
6� 5:pr%=60
@�
J� pr%>0 � pr%<70
T,�0,pgrey%:ȓ Ȑ 0,630,1599,135:�0,black%
^N� 30,740:�"Average percentage of 'accidental' red deaths per cycle = ";pr%
h�
rȗ � 100,600
|� 23,17,7,6,16;16;0;0;
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�� 23,17,7,6,8;16;0;0;
��0,dbrown%
�n� 30,620:� "Prey(the blues) are likely to be killed if more than a specifiable number of predators(reds) "
�1� 30,580:�"are in the surrounding 8 squares."
�F� 30,540:�"Choose this minimum number by clicking on a box below."
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�� option%=0 � 3
�9�_button(64+384*option%,432,50,mgrey%,dgrey%,vdgrey%)
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�
� 0,colr%
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� option%
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"� red%,"     Maximum reds = 1"
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&"� red%,"     Maximum reds = 3"
0opt%=-1
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Noptn%+=1
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�
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�
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��
�� n6%>-1 � n6%<4
�,�0,pgrey%:ȓ Ȑ 0,425,1599,120:�0,black%
�Y� 30,530:�"Maximum number of reds around blue square without blue being eaten = ";n6%
��
��0,dbrown%
�p� 30,440:� "Prey(blues) can die of other causes, - illness, disease, accidents, old age - so we can specify"
�k� 30,400:�"the average percentage of the blue population that may die in each cycle from these causes."
�_� 30,360:�"Choose this percentage by clicking with the mouse Select button on a box below."
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� option%=0 � 5
9�_button(80+256*option%,240,50,mgrey%,dgrey%,vdgrey%)
 � colr%,op$
*
� 0,colr%
4	� op$
>
� option%
H� blue%,"      10%"
R� blue%,"      20%"
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�optn%+=1
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�� optn%=5 � optn%=-1
�� opt%<>-1
�
Ȏ opt% �
�� 0:pb%=10
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�� 2:pb%=30
�� 3:pb%=40
�� 4:pb%=50
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�
� pb%>0 � pb%<70
$,�0,pgrey%:ȓ Ȑ 0,230,1599,135:�0,black%
.O� 30,340:�"Average percentage of 'accidental' blue deaths per cycle = ";pb%
8�
B� �tut_com_colours
Lpgrey%     =  0
Vdbrown%    =  1
`blue%      =  4
jred%       =  5
twhite%     =  7
~black%     =  8
�mgrey%     =  9
�dgrey%     = 10
�vdgrey%    = 11
�lbrown%    = 12
�mgreen%    = 14
�� blue%,        0,  0,255
�� red%,       255,  0,  0
�� black%,       0,  0,  0
�� white%,     255,255,255
�� pgrey%,     200,200,200
�� mgrey%,     170,170,170
�� dgrey%,     140,140,140
� vdgrey%,     70, 70, 70

� lbrown%,    220,100, 30
� mgreen%,      0,120,  0
� dbrown%,    120, 60, 60
(� 15,         112,255,112
2�
<G� �head3(hd$,xs%,ys%,vdx%,vdy%,xshift%,yshift%,ulcol%,drcol%,tcol%)
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P-�0,ulcol%:� xs%-xshift%,ys%+yshift%:� hd$
Z-�0,drcol%:� xs%+xshift%,ys%-yshift%:� hd$
d�0,tcol%:� xs%,ys%:� hd$
n�
x� �tutborder(x%,y%,w%,h%)
�gcol%=8:dx%=0
�� 0,pgrey%
�+ȓ Ȑ x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%
�dx% +=4
��
�
gcol% +=1
�
� 0,gcol%
�+ȓ Ȑ x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%
�dx% +=4
�� gcol%=11
��
�gcol% -=1:dx% +=4
�
� 0,gcol%
+ȓ Ȑ x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%

� gcol%=9
dx% +=4:� 0,pgrey%
"+ȓ Ȑ x% + dx%,y%+dx%,w%-2*dx%,h%-2*dx%
,� 23,17,7,6,16;16;0;0;
6�
@ � �paging(pages%,� nowpage%)
J� +6
T� option%=0 � 2
^8�_button(80+544*option%,32,52,mgrey%,dgrey%,vdgrey%)
h� colr%,op$
r
� 0,colr%
|	� op$
�
� option%
�� col_menu%, "   Menu"
� � col_back%, "   <<<<< Back"
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�opt%=-1
�optn%=-1
��
�optn%+=1
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�� optn%=2 � optn%=-1
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�
Ȏ opt% �
�� 0
 � leave loop, return to menu
� 1
� nowpage%>1 � nowpage%-=1
&� 2
0#� nowpage%<pages% � nowpage%+=1
:�
Dȗ ȓ 0,0,1599,1199
N�
X$� �populations(nowpage%,cycles%)
b� pages%
l!� col_menu%,col_back%,col_on%
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��
�pages%=2:col_menu%=lbrown%
��
�#col_back%=black%:col_on%=black%
�&� nowpage%=1      col_back%=mgrey%
�&� nowpage%=pages% col_on%  =mgrey%
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�,� 1:�pops_page1(pages%,nowpage%,cycles%)
�$� 2:�pops_page2(pages%,nowpage%)
��
��paging(pages%,nowpage%)
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��
*� �pops_page1(pages%,nowpage%,cycles%)
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4�23,17,7,6,8;16;0;0;
>�0,blue%:� 74,78
Hc�"Hold down key ""S"" to stop cycles(max.=48),  then click 'On' for graph or 'Menu' to restart"
Rȗ � 1100,200
\�23,17,7,6,8;8;0;0;
f9�0,black%:� 50,1160:�"Cycle   Reds    Blues   Spaces"
p�23,17,7,6,8;8;0;0;
z5ox%=557:oy%=1160:lenx%=1000:leny%=lenx%:divs%=100
�
�0,mgrey%
�� i%=0 � divs%
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�� i%
�� i%=0 � divs%
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�� i%
�/A()=0:redpop%=0:bluepop%=0:dead%=0:cycle%=0
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�dummy=�(-�)
�� j%=0 � divs%-1
�� k%=0 � divs%-1
�cell%=�(300)
(� cell%>=250 A(j%,k%)=10:� red cells
3� cell%>=50 � cell%<250 A(j%,k%)=1:� blue cells
.� cell%<50 A(j%,k%)=0:� dead or grey cells
$� A(j%,k%)=10 redpop%+=1
.� A(j%,k%)=1 bluepop%+=1
8� A(j%,k%)=0 dead%+=1
B� k%
L� j%
V>totals(0,0)=redpop%:totals(0,1)=bluepop%:totals(0,2)=dead%
`
�0,black%
jF@%=&00000505:ypos%=1130:xcycle%=20:xred%=163:xblue%=295:xdead%=430
t1� xcycle%,ypos%:�cycle%:�xred%,ypos%:�redpop%
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�� j%=0 � divs%-1
�� k%=0 � divs%-1
�� A(j%,k%) = 10 �
��0,red%
�5ȏ Ȑ ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
��
�� A(j%,k%) = 1 �
��0,blue%
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��
�� A(j%,k%) = 0 �
�
�0,dgrey%
5ȏ Ȑ ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4

�
� k%
� j%
(cycle%=1:key$="G"
2"ȕ cycle%<=cycles% � key$<>"S"
< redpop%=0:bluepop%=0:dead%=0
F
key$=�(5)
P*FX15,1
Z� j%=0 � divs%-1
d� k%=0 � divs%-1
n
Ȏ � �
xB� j%<>0 � k%<>0 � j%<>divs%-1 � k%<>divs%-1:� all except edges
�hsum%=A(j%-1,k%-1)+A(j%-1,k%)+A(j%-1,k%+1)+A(j%,k%-1)+A(j%,k%+1)+A(j%+1,k%-1)+A(j%+1,k%)+A(j%+1,k%+1)
� � j%=0 � k%<>0 � k%<>divs%-1
�fsum%=A(divs%-1,k%-1)+A(divs%-1,k%)+A(divs%-1,k%+1)+A(0,k%-1)+A(0,k%+1)+A(1,k%-1)+A(1,k%)+A(1,k%+1)
�&� j%=divs%-1 � k%<>0 � k%<>divs%-1
�rsum%=A(divs%-2,k%-1)+A(divs%-2,k%)+A(divs%-2,k%+1)+A(divs%-1,k%-1)+A(divs%-1,k%+1)+A(0,k%-1)+A(0,k%)+A(0,k%+1)
� � k%=0 � j%<>0 � j%<>divs%-1
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�&� k%=divs%-1 � j%<>0 � j%<>divs%-1
�rsum%=A(j%-1,divs%-2)+A(j%-1,divs%-1)+A(j%-1,0)+A(j%,divs%-2)+A(j%,0)+A(j%+1,divs%-2)+A(j%+1,divs%-1)+A(j%+1,0)
�� j%=0 � k%=0
�dsum%=A(divs%-1,divs%-1)+A(divs%-1,0)+A(divs%-1,1)+A(0,divs%-1)+A(0,1)+A(1,divs%-1)+A(1,0)+A(1,1)
�� j%=0 � k%=divs%-1
�psum%=A(divs%-1,divs%-2)+A(divs%-1,divs%-1)+A(divs%-1,0)+A(0,divs%-2)+A(0,0)+A(1,divs%-2)+A(1,divs%-1)+A(1,0)
� j%=divs%-1 � k%=0
psum%=A(divs%-2,divs%-1)+A(divs%-2,0)+A(divs%-2,1)+A(divs%-1,divs%-1)+A(divs%-1,1)+A(0,divs%-1)+A(0,0)+A(0,1)
� j%=divs%-1 � k%=divs%-1
"|sum%=A(divs%-2,divs%-2)+A(divs%-2,divs%-1)+A(divs%-2,0)+A(divs%-1,divs%-2)+A(divs%-1,0)+A(0,divs%-2)+A(0,divs%-1)+A(0,0)
,�
6/redsum%=�(sum%/10):bluesum%=sum%-10*redsum%
@deadsum%=8-redsum%-bluesum%
J� dead cell processing-
T� A(j%,k%)=0 �
^temp(j%,k%)=0
h/� redsum%>n1% � bluesum%>n2% temp(j%,k%)=10
r.� bluesum%>n3% � redsum%<n4% temp(j%,k%)=1
|�
�� red cell processing-
�� A(j%,k%)=10 �
�temp(j%,k%)=10
� � bluesum%<n5% temp(j%,k%)=0
�0dummy=�(-�):� �(100)>(100-pr%) temp(j%,k%)=0
��
�� blue cell processing-
�� A(j%,k%)=1 �
�temp(j%,k%)=1
�� redsum%>n6% temp(j%,k%)=0
�0dummy=�(-�):� �(100)>(100-pb%) temp(j%,k%)=0
��
�� k%
� j%
A()=temp():temp()=0
� j%=0 � divs%-1
&� k%=0 � divs%-1
0� A(j%,k%) = 10 �
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D5ȏ Ȑ ox%+k%*lenx%/divs%+5,oy%-j%*leny%/divs%-5,4
N�
X� A(j%,k%) = 1 �
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v�
�� A(j%,k%) = 0 �
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��
�� k%
�� j%
�/�0,black%:� xcycle%,ypos%-20*cycle%:�cycle%
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cycle%+=1
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�0,white%
�� i%=0 � 50
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�� i%
�� i%=0 � 50
�"� xo%,yo%+i%*yl%/50:� BY xl%,0
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4� xo%+(i%+1)*xl%/50,yo%+totals(i%+1,2)*yl%/10000
� i%

�0,black%
(�tutborder(0,0,1599,124)
2�
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ht=height
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ln=len
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�Ȏ count% �
�� 1
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�� 1
�"� &8D,xpos+len/2,ypos+height/2
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� opt%=-1
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�
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00004d80  41 28 6a 25 2c 6b 25 2b  31 29 2b 41 28 6a 25 2b  |A(j%,k%+1)+A(j%+|
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00004dd0  19 96 66 73 75 6d 25 3d  41 28 64 69 76 73 25 2d  |..fsum%=A(divs%-|
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00004e00  6b 25 2b 31 29 2b 41 28  30 2c 6b 25 2d 31 29 2b  |k%+1)+A(0,k%-1)+|
00004e10  41 28 30 2c 6b 25 2b 31  29 2b 41 28 31 2c 6b 25  |A(0,k%+1)+A(1,k%|
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00004e80  29 2b 41 28 64 69 76 73  25 2d 32 2c 6b 25 2b 31  |)+A(divs%-2,k%+1|
00004e90  29 2b 41 28 64 69 76 73  25 2d 31 2c 6b 25 2d 31  |)+A(divs%-1,k%-1|
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00004f40  41 28 6a 25 2b 31 2c 30  29 2b 41 28 6a 25 2b 31  |A(j%+1,0)+A(j%+1|
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00004fd0  29 2b 41 28 6a 25 2b 31  2c 64 69 76 73 25 2d 31  |)+A(j%+1,divs%-1|
00004fe0  29 2b 41 28 6a 25 2b 31  2c 30 29 0d 19 dc 11 c9  |)+A(j%+1,0).....|
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