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  1. #include <stdio.h>
  2.  
  3. int main() {
  4. int num = 0, count = 0;
  5.  
  6. printf("To quit, enter 0\n");
  7. while (1) {
  8. printf("Please, enter number: ");
  9. scanf("%d", &num);
  10. if (num == 0) {
  11. break;
  12. }
  13. if (num % 10 == 7) count++;
  14. }
  15. printf("Count = %d\n",count);
  16. }
  17.  
Success #stdin #stdout 0s 9424KB
stdin
231213
2132
34437
554
567
64
7
34437
0
stdout
To quit, enter 0
Please, enter number: Please, enter number: Please, enter number: Please, enter number: Please, enter number: Please, enter number: Please, enter number: Please, enter number: Please, enter number: Count = 4