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  1. #include <stdio.h>
  2.  
  3. int cont()
  4. {
  5.   int c;
  6.   do {
  7.     int d;
  8.     printf("Continue (y/n): ");
  9.     if ((c = fgetc(stdin)) < 0) {
  10.       fprintf(stderr, "Input failed!\n"); return 0;
  11.     }
  12.     printf("Input '%c'\n", c);
  13.     for (d = c; d != '\n';) {
  14.       if ((d = fgetc(stdin)) < 0) {
  15.         fprintf(stderr, "Input failed!\n"); return 0;
  16.       }
  17.     }
  18.   } while (c != 'y' && c != 'n');
  19.   return c == 'y';
  20. }
  21.  
  22. int main()
  23. {
  24.   int i = 0;
  25.   do {
  26.     printf("Loop iteration %d.\n", ++i);
  27.   } while (cont());
  28.   /* done */
  29.   return 0;
  30. }
Success #stdin #stdout 0s 9424KB
comments (?)
stdin
copy 
y
Hello
n
stdout
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Loop iteration 1.
Continue (y/n): Input 'y'
Loop iteration 2.
Continue (y/n): Input 'H'
Continue (y/n): Input 'n'
https://ideone.com/X2NCEX
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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