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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int teste1 = carries(9, 1);
  5. 	int teste2 = carries(99, 1);
  6. 	int teste3 = carries(999, 1);
  7. 	int teste4 = carries(999, 10);
  8.  
  9. 	printf("9+1: %i carries\n", teste1);
  10. 	printf("99+1: %i carries\n", teste2);
  11. 	printf("999+1: %i carries\n", teste3);
  12. 	printf("999+10: %i carries\n", teste4);
  13.  
  14. 	return 0;
  15. }
  16.  
  17. int carries(int a, int b) {
  18. 	return (sumDigits(a) + sumDigits(b) - sumDigits(a+b)) / 9;
  19. }
  20.  
  21. int sumDigits(int num) {
  22. 	int sum = 0;
  23.     while (num != 0) {
  24.         sum += num % 10;
  25.         num /= 10;
  26.     }
  27.     return sum;
  28. }
Success #stdin #stdout 0s 2112KB
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stdin
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Standard input is empty
stdout
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9+1: 1 carries
99+1: 2 carries
999+1: 3 carries
999+10: 2 carries
https://ideone.com/P8OZ5t
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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