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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int b;
  5.     for (;;) { // Repeat forever
  6.         int numRead = scanf("%d",&b);
  7.         if (numRead == 1) {
  8.             break;
  9.         }
  10.         printf("You did not enter a number\n");
  11.         scanf("%*s");
  12.     }
  13.     printf("b=%d\n", b);
  14. }
  15.  
Success #stdin #stdout 0s 2252KB
comments (?)
stdin
copy 
hello
world
123
stdout
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You did not enter a number
You did not enter a number
b=123
https://ideone.com/l3J6Id
language:
C99 (gcc 8.3)
created:
11 years ago
visibility:
public

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