Home » Archimedes archive » Acorn User » AU 1995-04.adf » !C_C » c/dowhile
c/dowhile
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/dowhile |
| Read OK: | ✔ |
| File size: | 039F bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
/* Program to demonstrate the use of do-while */
/* Acorn User 'C for yourself' demonstration C program - April 1995 */
#include <stdio.h>
main()
{
int choice = 0;
do {
printf("1: Do this\n");
printf("2: Do that\n");
printf("3: Do the other\n\n");
printf("Please enter a choice from the menu:\n");
scanf("%d",&choice);
while (getchar() != '\n') {
/* Do nothing in the while loop! */
}
/* The above statement cleans up the information produced by
scanf() by skipping through characters remaining in the input
stream until a newline ('Return' character) is reached. */
if (choice < 1 || choice > 3) {
printf("Sorry - that option does not exist.\n");
printf("Please pick another option.\n\n");
}
} while (choice < 1 || choice > 3);
printf("You picked option %d\n",choice);
} 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 74 68 65 20 75 73 |monstrate the us|
00000020 65 20 6f 66 20 64 6f 2d 77 68 69 6c 65 20 2a 2f |e of do-while */|
00000030 0a 2f 2a 20 41 63 6f 72 6e 20 55 73 65 72 20 27 |./* Acorn User '|
00000040 43 20 66 6f 72 20 79 6f 75 72 73 65 6c 66 27 20 |C for yourself' |
00000050 64 65 6d 6f 6e 73 74 72 61 74 69 6f 6e 20 43 20 |demonstration C |
00000060 70 72 6f 67 72 61 6d 20 2d 20 41 70 72 69 6c 20 |program - April |
00000070 31 39 39 35 20 2a 2f 0a 0a 23 69 6e 63 6c 75 64 |1995 */..#includ|
00000080 65 20 20 20 20 3c 73 74 64 69 6f 2e 68 3e 0a 0a |e <stdio.h>..|
00000090 6d 61 69 6e 28 29 0a 7b 0a 20 20 20 20 69 6e 74 |main().{. int|
000000a0 20 63 68 6f 69 63 65 20 3d 20 30 3b 0a 0a 20 20 | choice = 0;.. |
000000b0 20 20 64 6f 20 7b 0a 20 20 20 20 20 20 20 20 70 | do {. p|
000000c0 72 69 6e 74 66 28 22 31 3a 20 44 6f 20 74 68 69 |rintf("1: Do thi|
000000d0 73 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 70 |s\n");. p|
000000e0 72 69 6e 74 66 28 22 32 3a 20 44 6f 20 74 68 61 |rintf("2: Do tha|
000000f0 74 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 70 |t\n");. p|
00000100 72 69 6e 74 66 28 22 33 3a 20 44 6f 20 74 68 65 |rintf("3: Do the|
00000110 20 6f 74 68 65 72 5c 6e 5c 6e 22 29 3b 0a 20 20 | other\n\n");. |
00000120 20 20 20 20 20 20 70 72 69 6e 74 66 28 22 50 6c | printf("Pl|
00000130 65 61 73 65 20 65 6e 74 65 72 20 61 20 63 68 6f |ease enter a cho|
00000140 69 63 65 20 66 72 6f 6d 20 74 68 65 20 6d 65 6e |ice from the men|
00000150 75 3a 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 |u:\n");. |
00000160 73 63 61 6e 66 28 22 25 64 22 2c 26 63 68 6f 69 |scanf("%d",&choi|
00000170 63 65 29 3b 0a 20 20 20 20 20 20 20 20 77 68 69 |ce);. whi|
00000180 6c 65 20 28 67 65 74 63 68 61 72 28 29 20 21 3d |le (getchar() !=|
00000190 20 27 5c 6e 27 29 20 7b 0a 20 20 20 20 20 20 20 | '\n') {. |
000001a0 20 20 20 20 2f 2a 20 44 6f 20 6e 6f 74 68 69 6e | /* Do nothin|
000001b0 67 20 69 6e 20 74 68 65 20 77 68 69 6c 65 20 6c |g in the while l|
000001c0 6f 6f 70 21 20 2a 2f 0a 20 20 20 20 20 20 20 20 |oop! */. |
000001d0 7d 0a 0a 20 20 20 20 20 20 20 20 2f 2a 20 54 68 |}.. /* Th|
000001e0 65 20 61 62 6f 76 65 20 73 74 61 74 65 6d 65 6e |e above statemen|
000001f0 74 20 63 6c 65 61 6e 73 20 75 70 20 74 68 65 20 |t cleans up the |
00000200 69 6e 66 6f 72 6d 61 74 69 6f 6e 20 70 72 6f 64 |information prod|
00000210 75 63 65 64 20 62 79 0a 20 20 20 20 20 20 20 20 |uced by. |
00000220 73 63 61 6e 66 28 29 20 62 79 20 73 6b 69 70 70 |scanf() by skipp|
00000230 69 6e 67 20 74 68 72 6f 75 67 68 20 63 68 61 72 |ing through char|
00000240 61 63 74 65 72 73 20 72 65 6d 61 69 6e 69 6e 67 |acters remaining|
00000250 20 69 6e 20 74 68 65 20 69 6e 70 75 74 0a 20 20 | in the input. |
00000260 20 20 20 20 20 20 73 74 72 65 61 6d 20 75 6e 74 | stream unt|
00000270 69 6c 20 61 20 6e 65 77 6c 69 6e 65 20 28 27 52 |il a newline ('R|
00000280 65 74 75 72 6e 27 20 63 68 61 72 61 63 74 65 72 |eturn' character|
00000290 29 20 69 73 20 72 65 61 63 68 65 64 2e 20 2a 2f |) is reached. */|
000002a0 0a 0a 20 20 20 20 20 20 20 20 69 66 20 28 63 68 |.. if (ch|
000002b0 6f 69 63 65 20 3c 20 31 20 7c 7c 20 63 68 6f 69 |oice < 1 || choi|
000002c0 63 65 20 3e 20 33 29 20 7b 0a 20 20 20 20 20 20 |ce > 3) {. |
000002d0 20 20 20 20 20 20 70 72 69 6e 74 66 28 22 53 6f | printf("So|
000002e0 72 72 79 20 2d 20 74 68 61 74 20 6f 70 74 69 6f |rry - that optio|
000002f0 6e 20 64 6f 65 73 20 6e 6f 74 20 65 78 69 73 74 |n does not exist|
00000300 2e 5c 6e 22 29 3b 0a 20 20 20 20 20 20 20 20 20 |.\n");. |
00000310 20 20 20 70 72 69 6e 74 66 28 22 50 6c 65 61 73 | printf("Pleas|
00000320 65 20 70 69 63 6b 20 61 6e 6f 74 68 65 72 20 6f |e pick another o|
00000330 70 74 69 6f 6e 2e 5c 6e 5c 6e 22 29 3b 0a 20 20 |ption.\n\n");. |
00000340 20 20 20 20 20 20 7d 0a 20 20 20 20 7d 20 77 68 | }. } wh|
00000350 69 6c 65 20 28 63 68 6f 69 63 65 20 3c 20 31 20 |ile (choice < 1 |
00000360 7c 7c 20 63 68 6f 69 63 65 20 3e 20 33 29 3b 0a ||| choice > 3);.|
00000370 0a 20 20 20 20 70 72 69 6e 74 66 28 22 59 6f 75 |. printf("You|
00000380 20 70 69 63 6b 65 64 20 6f 70 74 69 6f 6e 20 25 | picked option %|
00000390 64 5c 6e 22 2c 63 68 6f 69 63 65 29 3b 0a 7d |d\n",choice);.}|
0000039f 
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