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  1. #include <stdio.h>
  2.  
  3. #define BASE 10
  4.  
  5. int main() {
  6. 	char user_input[5];
  7. 	int x;
  8.  
  9. 	printf("Enter a number:");
  10. 	if (fgets(user_input, sizeof(user_input), stdin)) {
  11. 		if (sscanf(user_input, "%d", &x) == 1) {
  12. 			int sum = 0;
  13. 			while (x > 0) {
  14. 				sum += x % BASE;
  15. 				x /= BASE;
  16. 			}
  17. 			printf("Sum: %d\n", sum);
  18. 		}
  19. 	}
  20.  
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 2172KB
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stdin
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4567
stdout
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Enter a number:Sum: 22
https://ideone.com/mgYr89
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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