Home » Archimedes archive » Acorn User » AU 1995-04.adf » !C_C » c/numgame
c/numgame
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 1995-04.adf » !C_C |
| Filename: | c/numgame |
| Read OK: | ✔ |
| File size: | 0E6F bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
/* Program to demonstrate multiple if statements, switch constructions,
infinite for loops and do-while loops as well as random number
generation! */
/* Acorn User 'C for yourself' demonstration C program - April 1995 */
#include <stdio.h>
#include <stdlib.h>
main ()
{
int number = 0;
int chance = 0;
int guess = 0, correct = 0;
int choice = 0;
float temp = 0.0;
printf("Number guesser\n--------------\n\n");
printf("You have ten chances to guess a number between 0 and 100.\n\n");
printf("Please enter a positive integer to 'seed' the number generator.\n");
scanf("%d",&number);
while (getchar() != '\n');
if (number < 0) number = -number;
srand(number);
for ( ; ; ) {
/* This is an infinite 'for' loop, and the only way the program
can terminate is through the 'return' statement towards the end
of the code */
temp = (float) rand() / (float) RAND_MAX;
/* The above statement scales the random number generated by the
'rand()' function into a floating point number between 0 and 1.
'rand()' and RAND_MAX are predefined in ANSI C. */
number = 100*temp;
/* Now the fraction has been used to pick an integer between
0 and 100 */
correct = 0;
for (chance = 1; chance <= 10; chance ++) {
printf("Please enter guess no. %d:\n",chance);
guess = 0;
scanf("%d",&guess);
while (getchar() != '\n') ;
/* The 'while' statement above cleans the input after the
scanf function. If this wasn't performed and the user entered
something odd such as a string instead of an integer, the program
would get somewhat confused and further input would be
corrupted. */
if (guess < number) {
printf("Sorry, you're too low.\n");
} else if (guess > number) {
printf("Nope - too high.\n");
} else {
printf("Congratulations! Spot on!\n");
correct = 1;
break;
}
/* This is a multiple 'if' construction - note that a maximum of two
comparisons are made. If 'guess' isn't smaller or larger than
'number', then they must be equal. The 'correct' flag is used to
determine which end-of-game message to print. */
}
if (correct == 1) {
printf("Well done - you guessed the mystery number.\n");
} else {
printf("Sorry, you didn't guess the number - it was %d.\n",number);
}
/* An if-else statement */
do {
printf("1: Play again\n");
printf("2: Quit program\n");
scanf("%d",&choice);
while (getchar() != '\n') ;
switch(choice) {
case 1:
/* Don't need to do anything here */
break;
case 2:
printf("Thanks for playing. Bye!\n");
return;
break;
default:
printf("Sorry - I didn't recognise that response.\n");
printf("Please choose again.\n\n");
}
/* A 'switch' construction that responds to the integers 1 and
2 - any other values cause the default case to be executed. */
} while (choice < 1 || choice > 2);
/* The do-while loop keeps iterating until the user picks a valid
option - if an invalid option is picked, the 'default' case is
executed. The 'break' statement terminates the do-while loop and so
passes control back to the infinite for loop, which starts the game
once more. The 'return' statement terminates the 'main()' function,
and so stops the program completely. */
}
} 00000000 2f 2a 20 50 72 6f 67 72 61 6d 20 74 6f 20 64 65 |/* Program to de|
00000010 6d 6f 6e 73 74 72 61 74 65 20 6d 75 6c 74 69 70 |monstrate multip|
00000020 6c 65 20 69 66 20 73 74 61 74 65 6d 65 6e 74 73 |le if statements|
00000030 2c 20 73 77 69 74 63 68 20 63 6f 6e 73 74 72 75 |, switch constru|
00000040 63 74 69 6f 6e 73 2c 0a 69 6e 66 69 6e 69 74 65 |ctions,.infinite|
00000050 20 66 6f 72 20 6c 6f 6f 70 73 20 61 6e 64 20 64 | for loops and d|
00000060 6f 2d 77 68 69 6c 65 20 6c 6f 6f 70 73 20 61 73 |o-while loops as|
00000070 20 77 65 6c 6c 20 61 73 20 72 61 6e 64 6f 6d 20 | well as random |
00000080 6e 75 6d 62 65 72 0a 67 65 6e 65 72 61 74 69 6f |number.generatio|
00000090 6e 21 20 2a 2f 0a 2f 2a 20 41 63 6f 72 6e 20 55 |n! */./* Acorn U|
000000a0 73 65 72 20 27 43 20 66 6f 72 20 79 6f 75 72 73 |ser 'C for yours|
000000b0 65 6c 66 27 20 64 65 6d 6f 6e 73 74 72 61 74 69 |elf' demonstrati|
000000c0 6f 6e 20 43 20 70 72 6f 67 72 61 6d 20 2d 20 41 |on C program - A|
000000d0 70 72 69 6c 20 31 39 39 35 20 2a 2f 0a 0a 23 69 |pril 1995 */..#i|
000000e0 6e 63 6c 75 64 65 20 3c 73 74 64 69 6f 2e 68 3e |nclude <stdio.h>|
000000f0 0a 23 69 6e 63 6c 75 64 65 20 3c 73 74 64 6c 69 |.#include <stdli|
00000100 62 2e 68 3e 0a 0a 6d 61 69 6e 20 28 29 0a 7b 0a |b.h>..main ().{.|
00000110 20 20 20 69 6e 74 20 20 20 6e 75 6d 62 65 72 20 | int number |
00000120 3d 20 30 3b 0a 20 20 20 69 6e 74 20 20 20 63 68 |= 0;. int ch|
00000130 61 6e 63 65 20 3d 20 30 3b 0a 20 20 20 69 6e 74 |ance = 0;. int|
00000140 20 20 20 67 75 65 73 73 20 3d 20 30 2c 20 63 6f | guess = 0, co|
00000150 72 72 65 63 74 20 3d 20 30 3b 0a 20 20 20 69 6e |rrect = 0;. in|
00000160 74 20 20 20 63 68 6f 69 63 65 20 3d 20 30 3b 0a |t choice = 0;.|
00000170 20 20 20 66 6c 6f 61 74 20 74 65 6d 70 20 3d 20 | float temp = |
00000180 30 2e 30 3b 0a 0a 20 20 20 70 72 69 6e 74 66 28 |0.0;.. printf(|
00000190 22 4e 75 6d 62 65 72 20 67 75 65 73 73 65 72 5c |"Number guesser\|
000001a0 6e 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 5c |n--------------\|
000001b0 6e 5c 6e 22 29 3b 0a 20 20 20 70 72 69 6e 74 66 |n\n");. printf|
000001c0 28 22 59 6f 75 20 68 61 76 65 20 74 65 6e 20 63 |("You have ten c|
000001d0 68 61 6e 63 65 73 20 74 6f 20 67 75 65 73 73 20 |hances to guess |
000001e0 61 20 6e 75 6d 62 65 72 20 62 65 74 77 65 65 6e |a number between|
000001f0 20 30 20 61 6e 64 20 31 30 30 2e 5c 6e 5c 6e 22 | 0 and 100.\n\n"|
00000200 29 3b 0a 20 20 20 70 72 69 6e 74 66 28 22 50 6c |);. printf("Pl|
00000210 65 61 73 65 20 65 6e 74 65 72 20 61 20 70 6f 73 |ease enter a pos|
00000220 69 74 69 76 65 20 69 6e 74 65 67 65 72 20 74 6f |itive integer to|
00000230 20 27 73 65 65 64 27 20 74 68 65 20 6e 75 6d 62 | 'seed' the numb|
00000240 65 72 20 67 65 6e 65 72 61 74 6f 72 2e 5c 6e 22 |er generator.\n"|
00000250 29 3b 0a 20 20 20 73 63 61 6e 66 28 22 25 64 22 |);. scanf("%d"|
00000260 2c 26 6e 75 6d 62 65 72 29 3b 0a 20 20 20 77 68 |,&number);. wh|
00000270 69 6c 65 20 28 67 65 74 63 68 61 72 28 29 20 21 |ile (getchar() !|
00000280 3d 20 27 5c 6e 27 29 3b 0a 20 20 20 69 66 20 28 |= '\n');. if (|
00000290 6e 75 6d 62 65 72 20 3c 20 30 29 20 6e 75 6d 62 |number < 0) numb|
000002a0 65 72 20 3d 20 2d 6e 75 6d 62 65 72 3b 0a 20 20 |er = -number;. |
000002b0 20 73 72 61 6e 64 28 6e 75 6d 62 65 72 29 3b 0a | srand(number);.|
000002c0 20 20 20 20 0a 20 20 20 66 6f 72 20 28 20 3b 20 | . for ( ; |
000002d0 3b 20 29 20 7b 0a 0a 20 20 20 20 20 20 2f 2a 20 |; ) {.. /* |
000002e0 54 68 69 73 20 69 73 20 61 6e 20 69 6e 66 69 6e |This is an infin|
000002f0 69 74 65 20 27 66 6f 72 27 20 6c 6f 6f 70 2c 20 |ite 'for' loop, |
00000300 61 6e 64 20 74 68 65 20 6f 6e 6c 79 20 77 61 79 |and the only way|
00000310 20 74 68 65 20 70 72 6f 67 72 61 6d 0a 20 20 20 | the program. |
00000320 20 20 20 63 61 6e 20 74 65 72 6d 69 6e 61 74 65 | can terminate|
00000330 20 69 73 20 74 68 72 6f 75 67 68 20 74 68 65 20 | is through the |
00000340 27 72 65 74 75 72 6e 27 20 73 74 61 74 65 6d 65 |'return' stateme|
00000350 6e 74 20 74 6f 77 61 72 64 73 20 74 68 65 20 65 |nt towards the e|
00000360 6e 64 0a 20 20 20 20 20 20 6f 66 20 74 68 65 20 |nd. of the |
00000370 63 6f 64 65 20 2a 2f 0a 0a 20 20 20 20 20 20 74 |code */.. t|
00000380 65 6d 70 20 3d 20 28 66 6c 6f 61 74 29 20 72 61 |emp = (float) ra|
00000390 6e 64 28 29 20 2f 20 28 66 6c 6f 61 74 29 20 52 |nd() / (float) R|
000003a0 41 4e 44 5f 4d 41 58 3b 0a 0a 20 20 20 20 20 20 |AND_MAX;.. |
000003b0 2f 2a 20 54 68 65 20 61 62 6f 76 65 20 73 74 61 |/* The above sta|
000003c0 74 65 6d 65 6e 74 20 73 63 61 6c 65 73 20 74 68 |tement scales th|
000003d0 65 20 72 61 6e 64 6f 6d 20 6e 75 6d 62 65 72 20 |e random number |
000003e0 67 65 6e 65 72 61 74 65 64 20 62 79 20 74 68 65 |generated by the|
000003f0 0a 20 20 20 20 20 20 27 72 61 6e 64 28 29 27 20 |. 'rand()' |
00000400 66 75 6e 63 74 69 6f 6e 20 69 6e 74 6f 20 61 20 |function into a |
00000410 66 6c 6f 61 74 69 6e 67 20 70 6f 69 6e 74 20 6e |floating point n|
00000420 75 6d 62 65 72 20 62 65 74 77 65 65 6e 20 30 20 |umber between 0 |
00000430 61 6e 64 20 31 2e 0a 20 20 20 20 20 20 27 72 61 |and 1.. 'ra|
00000440 6e 64 28 29 27 20 61 6e 64 20 52 41 4e 44 5f 4d |nd()' and RAND_M|
00000450 41 58 20 61 72 65 20 70 72 65 64 65 66 69 6e 65 |AX are predefine|
00000460 64 20 69 6e 20 41 4e 53 49 20 43 2e 20 2a 2f 0a |d in ANSI C. */.|
00000470 0a 20 20 20 20 20 20 6e 75 6d 62 65 72 20 3d 20 |. number = |
00000480 31 30 30 2a 74 65 6d 70 3b 0a 0a 20 20 20 20 20 |100*temp;.. |
00000490 20 2f 2a 20 4e 6f 77 20 74 68 65 20 66 72 61 63 | /* Now the frac|
000004a0 74 69 6f 6e 20 68 61 73 20 62 65 65 6e 20 75 73 |tion has been us|
000004b0 65 64 20 74 6f 20 70 69 63 6b 20 61 6e 20 69 6e |ed to pick an in|
000004c0 74 65 67 65 72 20 62 65 74 77 65 65 6e 0a 20 20 |teger between. |
000004d0 20 20 20 20 30 20 61 6e 64 20 31 30 30 20 2a 2f | 0 and 100 */|
000004e0 0a 0a 20 20 20 20 20 20 63 6f 72 72 65 63 74 20 |.. correct |
000004f0 3d 20 30 3b 0a 20 20 20 0a 20 20 20 20 20 20 66 |= 0;. . f|
00000500 6f 72 20 28 63 68 61 6e 63 65 20 3d 20 31 3b 20 |or (chance = 1; |
00000510 63 68 61 6e 63 65 20 3c 3d 20 31 30 3b 20 63 68 |chance <= 10; ch|
00000520 61 6e 63 65 20 2b 2b 29 20 7b 0a 20 20 20 20 20 |ance ++) {. |
00000530 20 20 20 20 70 72 69 6e 74 66 28 22 50 6c 65 61 | printf("Plea|
00000540 73 65 20 65 6e 74 65 72 20 67 75 65 73 73 20 6e |se enter guess n|
00000550 6f 2e 20 25 64 3a 5c 6e 22 2c 63 68 61 6e 63 65 |o. %d:\n",chance|
00000560 29 3b 0a 20 20 20 20 20 20 20 20 20 67 75 65 73 |);. gues|
00000570 73 20 3d 20 30 3b 0a 20 20 20 20 20 20 20 20 20 |s = 0;. |
00000580 73 63 61 6e 66 28 22 25 64 22 2c 26 67 75 65 73 |scanf("%d",&gues|
00000590 73 29 3b 0a 20 20 20 20 20 20 20 20 20 77 68 69 |s);. whi|
000005a0 6c 65 20 28 67 65 74 63 68 61 72 28 29 20 21 3d |le (getchar() !=|
000005b0 20 27 5c 6e 27 29 20 3b 0a 0a 20 20 20 20 20 20 | '\n') ;.. |
000005c0 20 20 20 2f 2a 20 54 68 65 20 27 77 68 69 6c 65 | /* The 'while|
000005d0 27 20 73 74 61 74 65 6d 65 6e 74 20 61 62 6f 76 |' statement abov|
000005e0 65 20 63 6c 65 61 6e 73 20 74 68 65 20 69 6e 70 |e cleans the inp|
000005f0 75 74 20 61 66 74 65 72 20 74 68 65 0a 20 20 20 |ut after the. |
00000600 20 20 20 20 20 20 73 63 61 6e 66 20 66 75 6e 63 | scanf func|
00000610 74 69 6f 6e 2e 20 49 66 20 74 68 69 73 20 77 61 |tion. If this wa|
00000620 73 6e 27 74 20 70 65 72 66 6f 72 6d 65 64 20 61 |sn't performed a|
00000630 6e 64 20 74 68 65 20 75 73 65 72 20 65 6e 74 65 |nd the user ente|
00000640 72 65 64 0a 20 20 20 20 20 20 20 20 20 73 6f 6d |red. som|
00000650 65 74 68 69 6e 67 20 6f 64 64 20 73 75 63 68 20 |ething odd such |
00000660 61 73 20 61 20 73 74 72 69 6e 67 20 69 6e 73 74 |as a string inst|
00000670 65 61 64 20 6f 66 20 61 6e 20 69 6e 74 65 67 65 |ead of an intege|
00000680 72 2c 20 74 68 65 20 70 72 6f 67 72 61 6d 0a 20 |r, the program. |
00000690 20 20 20 20 20 20 20 20 77 6f 75 6c 64 20 67 65 | would ge|
000006a0 74 20 73 6f 6d 65 77 68 61 74 20 63 6f 6e 66 75 |t somewhat confu|
000006b0 73 65 64 20 61 6e 64 20 66 75 72 74 68 65 72 20 |sed and further |
000006c0 69 6e 70 75 74 20 77 6f 75 6c 64 20 62 65 0a 20 |input would be. |
000006d0 20 20 20 20 20 20 20 20 63 6f 72 72 75 70 74 65 | corrupte|
000006e0 64 2e 20 2a 2f 0a 0a 20 20 20 20 20 20 20 20 20 |d. */.. |
000006f0 69 66 20 28 67 75 65 73 73 20 3c 20 6e 75 6d 62 |if (guess < numb|
00000700 65 72 29 20 7b 0a 20 20 20 20 20 20 20 20 20 20 |er) {. |
00000710 20 20 70 72 69 6e 74 66 28 22 53 6f 72 72 79 2c | printf("Sorry,|
00000720 20 79 6f 75 27 72 65 20 74 6f 6f 20 6c 6f 77 2e | you're too low.|
00000730 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 20 7d |\n");. }|
00000740 20 65 6c 73 65 20 69 66 20 28 67 75 65 73 73 20 | else if (guess |
00000750 3e 20 6e 75 6d 62 65 72 29 20 7b 0a 20 20 20 20 |> number) {. |
00000760 20 20 20 20 20 20 20 20 70 72 69 6e 74 66 28 22 | printf("|
00000770 4e 6f 70 65 20 2d 20 74 6f 6f 20 68 69 67 68 2e |Nope - too high.|
00000780 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 20 7d |\n");. }|
00000790 20 65 6c 73 65 20 7b 0a 20 20 20 20 20 20 20 20 | else {. |
000007a0 20 20 20 20 70 72 69 6e 74 66 28 22 43 6f 6e 67 | printf("Cong|
000007b0 72 61 74 75 6c 61 74 69 6f 6e 73 21 20 53 70 6f |ratulations! Spo|
000007c0 74 20 6f 6e 21 5c 6e 22 29 3b 0a 20 20 20 20 20 |t on!\n");. |
000007d0 20 20 20 20 20 20 20 63 6f 72 72 65 63 74 20 3d | correct =|
000007e0 20 31 3b 0a 20 20 20 20 20 20 20 20 20 20 20 20 | 1;. |
000007f0 62 72 65 61 6b 3b 0a 20 20 20 20 20 20 20 20 20 |break;. |
00000800 7d 0a 0a 20 20 20 20 20 20 20 20 20 2f 2a 20 54 |}.. /* T|
00000810 68 69 73 20 69 73 20 61 20 6d 75 6c 74 69 70 6c |his is a multipl|
00000820 65 20 27 69 66 27 20 63 6f 6e 73 74 72 75 63 74 |e 'if' construct|
00000830 69 6f 6e 20 2d 20 6e 6f 74 65 20 74 68 61 74 20 |ion - note that |
00000840 61 20 6d 61 78 69 6d 75 6d 20 6f 66 20 74 77 6f |a maximum of two|
00000850 0a 20 20 20 20 20 20 20 20 20 63 6f 6d 70 61 72 |. compar|
00000860 69 73 6f 6e 73 20 61 72 65 20 6d 61 64 65 2e 20 |isons are made. |
00000870 49 66 20 27 67 75 65 73 73 27 20 69 73 6e 27 74 |If 'guess' isn't|
00000880 20 73 6d 61 6c 6c 65 72 20 6f 72 20 6c 61 72 67 | smaller or larg|
00000890 65 72 20 74 68 61 6e 0a 20 20 20 20 20 20 20 20 |er than. |
000008a0 20 27 6e 75 6d 62 65 72 27 2c 20 74 68 65 6e 20 | 'number', then |
000008b0 74 68 65 79 20 6d 75 73 74 20 62 65 20 65 71 75 |they must be equ|
000008c0 61 6c 2e 20 54 68 65 20 27 63 6f 72 72 65 63 74 |al. The 'correct|
000008d0 27 20 66 6c 61 67 20 69 73 20 75 73 65 64 20 74 |' flag is used t|
000008e0 6f 0a 20 20 20 20 20 20 20 20 20 64 65 74 65 72 |o. deter|
000008f0 6d 69 6e 65 20 77 68 69 63 68 20 65 6e 64 2d 6f |mine which end-o|
00000900 66 2d 67 61 6d 65 20 6d 65 73 73 61 67 65 20 74 |f-game message t|
00000910 6f 20 70 72 69 6e 74 2e 20 2a 2f 0a 0a 20 20 20 |o print. */.. |
00000920 20 20 20 7d 0a 20 20 20 0a 20 20 20 20 20 20 69 | }. . i|
00000930 66 20 28 63 6f 72 72 65 63 74 20 3d 3d 20 31 29 |f (correct == 1)|
00000940 20 7b 0a 20 20 20 20 20 20 20 20 20 70 72 69 6e | {. prin|
00000950 74 66 28 22 57 65 6c 6c 20 64 6f 6e 65 20 2d 20 |tf("Well done - |
00000960 79 6f 75 20 67 75 65 73 73 65 64 20 74 68 65 20 |you guessed the |
00000970 6d 79 73 74 65 72 79 20 6e 75 6d 62 65 72 2e 5c |mystery number.\|
00000980 6e 22 29 3b 0a 20 20 20 20 20 20 7d 20 65 6c 73 |n");. } els|
00000990 65 20 7b 0a 20 20 20 20 20 20 20 20 20 70 72 69 |e {. pri|
000009a0 6e 74 66 28 22 53 6f 72 72 79 2c 20 79 6f 75 20 |ntf("Sorry, you |
000009b0 64 69 64 6e 27 74 20 67 75 65 73 73 20 74 68 65 |didn't guess the|
000009c0 20 6e 75 6d 62 65 72 20 2d 20 69 74 20 77 61 73 | number - it was|
000009d0 20 25 64 2e 5c 6e 22 2c 6e 75 6d 62 65 72 29 3b | %d.\n",number);|
000009e0 0a 20 20 20 20 20 20 7d 0a 0a 20 20 20 20 20 20 |. }.. |
000009f0 2f 2a 20 41 6e 20 69 66 2d 65 6c 73 65 20 73 74 |/* An if-else st|
00000a00 61 74 65 6d 65 6e 74 20 2a 2f 0a 20 20 20 0a 20 |atement */. . |
00000a10 20 20 20 20 20 64 6f 20 7b 0a 20 20 20 20 20 20 | do {. |
00000a20 20 20 20 70 72 69 6e 74 66 28 22 31 3a 20 50 6c | printf("1: Pl|
00000a30 61 79 20 61 67 61 69 6e 5c 6e 22 29 3b 0a 20 20 |ay again\n");. |
00000a40 20 20 20 20 20 20 20 70 72 69 6e 74 66 28 22 32 | printf("2|
00000a50 3a 20 51 75 69 74 20 70 72 6f 67 72 61 6d 5c 6e |: Quit program\n|
00000a60 22 29 3b 0a 0a 20 20 20 20 20 20 20 20 20 73 63 |");.. sc|
00000a70 61 6e 66 28 22 25 64 22 2c 26 63 68 6f 69 63 65 |anf("%d",&choice|
00000a80 29 3b 0a 20 20 20 20 20 20 20 20 20 77 68 69 6c |);. whil|
00000a90 65 20 28 67 65 74 63 68 61 72 28 29 20 21 3d 20 |e (getchar() != |
00000aa0 27 5c 6e 27 29 20 3b 0a 0a 20 20 20 20 20 20 20 |'\n') ;.. |
00000ab0 20 20 73 77 69 74 63 68 28 63 68 6f 69 63 65 29 | switch(choice)|
00000ac0 20 7b 0a 20 20 20 20 20 20 20 20 20 63 61 73 65 | {. case|
00000ad0 20 31 3a 0a 20 20 20 20 20 20 20 20 20 20 20 20 | 1:. |
00000ae0 2f 2a 20 44 6f 6e 27 74 20 6e 65 65 64 20 74 6f |/* Don't need to|
00000af0 20 64 6f 20 61 6e 79 74 68 69 6e 67 20 68 65 72 | do anything her|
00000b00 65 20 2a 2f 0a 20 20 20 20 20 20 20 20 20 20 20 |e */. |
00000b10 20 62 72 65 61 6b 3b 0a 20 20 20 20 20 20 20 20 | break;. |
00000b20 20 63 61 73 65 20 32 3a 0a 20 20 20 20 20 20 20 | case 2:. |
00000b30 20 20 20 20 20 70 72 69 6e 74 66 28 22 54 68 61 | printf("Tha|
00000b40 6e 6b 73 20 66 6f 72 20 70 6c 61 79 69 6e 67 2e |nks for playing.|
00000b50 20 42 79 65 21 5c 6e 22 29 3b 0a 20 20 20 20 20 | Bye!\n");. |
00000b60 20 20 20 20 20 20 20 72 65 74 75 72 6e 3b 0a 20 | return;. |
00000b70 20 20 20 20 20 20 20 20 20 20 20 62 72 65 61 6b | break|
00000b80 3b 0a 20 20 20 20 20 20 20 20 20 64 65 66 61 75 |;. defau|
00000b90 6c 74 3a 0a 20 20 20 20 20 20 20 20 20 20 20 20 |lt:. |
00000ba0 70 72 69 6e 74 66 28 22 53 6f 72 72 79 20 2d 20 |printf("Sorry - |
00000bb0 49 20 64 69 64 6e 27 74 20 72 65 63 6f 67 6e 69 |I didn't recogni|
00000bc0 73 65 20 74 68 61 74 20 72 65 73 70 6f 6e 73 65 |se that response|
00000bd0 2e 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 20 |.\n");. |
00000be0 20 20 20 70 72 69 6e 74 66 28 22 50 6c 65 61 73 | printf("Pleas|
00000bf0 65 20 63 68 6f 6f 73 65 20 61 67 61 69 6e 2e 5c |e choose again.\|
00000c00 6e 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 20 |n\n");. |
00000c10 7d 0a 0a 20 20 20 20 20 20 20 20 20 2f 2a 20 41 |}.. /* A|
00000c20 20 27 73 77 69 74 63 68 27 20 63 6f 6e 73 74 72 | 'switch' constr|
00000c30 75 63 74 69 6f 6e 20 74 68 61 74 20 72 65 73 70 |uction that resp|
00000c40 6f 6e 64 73 20 74 6f 20 74 68 65 20 69 6e 74 65 |onds to the inte|
00000c50 67 65 72 73 20 31 20 61 6e 64 0a 20 20 20 20 20 |gers 1 and. |
00000c60 20 20 20 20 32 20 2d 20 61 6e 79 20 6f 74 68 65 | 2 - any othe|
00000c70 72 20 76 61 6c 75 65 73 20 63 61 75 73 65 20 74 |r values cause t|
00000c80 68 65 20 64 65 66 61 75 6c 74 20 63 61 73 65 20 |he default case |
00000c90 74 6f 20 62 65 20 65 78 65 63 75 74 65 64 2e 20 |to be executed. |
00000ca0 2a 2f 0a 0a 20 20 20 20 20 20 7d 20 77 68 69 6c |*/.. } whil|
00000cb0 65 20 28 63 68 6f 69 63 65 20 3c 20 31 20 7c 7c |e (choice < 1 |||
00000cc0 20 63 68 6f 69 63 65 20 3e 20 32 29 3b 0a 0a 20 | choice > 2);.. |
00000cd0 20 20 20 20 20 2f 2a 20 54 68 65 20 64 6f 2d 77 | /* The do-w|
00000ce0 68 69 6c 65 20 6c 6f 6f 70 20 6b 65 65 70 73 20 |hile loop keeps |
00000cf0 69 74 65 72 61 74 69 6e 67 20 75 6e 74 69 6c 20 |iterating until |
00000d00 74 68 65 20 75 73 65 72 20 70 69 63 6b 73 20 61 |the user picks a|
00000d10 20 76 61 6c 69 64 0a 20 20 20 20 20 20 6f 70 74 | valid. opt|
00000d20 69 6f 6e 20 2d 20 69 66 20 61 6e 20 69 6e 76 61 |ion - if an inva|
00000d30 6c 69 64 20 6f 70 74 69 6f 6e 20 69 73 20 70 69 |lid option is pi|
00000d40 63 6b 65 64 2c 20 74 68 65 20 27 64 65 66 61 75 |cked, the 'defau|
00000d50 6c 74 27 20 63 61 73 65 20 69 73 0a 20 20 20 20 |lt' case is. |
00000d60 20 20 65 78 65 63 75 74 65 64 2e 20 54 68 65 20 | executed. The |
00000d70 27 62 72 65 61 6b 27 20 73 74 61 74 65 6d 65 6e |'break' statemen|
00000d80 74 20 74 65 72 6d 69 6e 61 74 65 73 20 74 68 65 |t terminates the|
00000d90 20 64 6f 2d 77 68 69 6c 65 20 6c 6f 6f 70 20 61 | do-while loop a|
00000da0 6e 64 20 73 6f 0a 20 20 20 20 20 20 70 61 73 73 |nd so. pass|
00000db0 65 73 20 63 6f 6e 74 72 6f 6c 20 62 61 63 6b 20 |es control back |
00000dc0 74 6f 20 74 68 65 20 69 6e 66 69 6e 69 74 65 20 |to the infinite |
00000dd0 66 6f 72 20 6c 6f 6f 70 2c 20 77 68 69 63 68 20 |for loop, which |
00000de0 73 74 61 72 74 73 20 74 68 65 20 67 61 6d 65 0a |starts the game.|
00000df0 20 20 20 20 20 20 6f 6e 63 65 20 6d 6f 72 65 2e | once more.|
00000e00 20 54 68 65 20 27 72 65 74 75 72 6e 27 20 73 74 | The 'return' st|
00000e10 61 74 65 6d 65 6e 74 20 74 65 72 6d 69 6e 61 74 |atement terminat|
00000e20 65 73 20 74 68 65 20 27 6d 61 69 6e 28 29 27 20 |es the 'main()' |
00000e30 66 75 6e 63 74 69 6f 6e 2c 0a 20 20 20 20 20 20 |function,. |
00000e40 61 6e 64 20 73 6f 20 73 74 6f 70 73 20 74 68 65 |and so stops the|
00000e50 20 70 72 6f 67 72 61 6d 20 63 6f 6d 70 6c 65 74 | program complet|
00000e60 65 6c 79 2e 20 2a 2f 0a 0a 20 20 20 7d 0a 7d |ely. */.. }.}|
00000e6f 
.