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  1. #include <stdio.h>
  2.  
  3. void allEven(int number, int *result);
  4.  
  5. int main()
  6. {
  7.     int num;
  8.     int result = 1;
  9.     printf("Enter a number: ");
  10.     scanf("%d", &num);
  11.     allEven(num, &result);
  12.     printf("allEven(): %d", result);
  13.     return 0;
  14.  
  15. }
  16. void allEven(int number, int *result)
  17. {
  18.     if ((number % 10) % 2) // if the last digit is odd
  19.     {
  20.         *result = 0;
  21.     }
  22.     else
  23.     {
  24.         *result = 1;
  25.         if ((number / 10) != 0) //not the last digit to evaluate, we call the function again.
  26.         {
  27.             allEven((number / 10), result);
  28.         }
  29.     }
  30. }
  31.  
Success #stdin #stdout 0s 2012KB
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Enter a number: allEven(): 0
https://ideone.com/dTJDx8
language:
C (gcc 8.3)
created:
10 years ago
visibility:
secret

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