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  1. #include <stdio.h>
  2.  
  3. void tohex(int n) {
  4.     if (n == 0) return;
  5.     tohex(n / 16);
  6.  
  7.     int digit = n % 16;
  8.     if (digit < 10)
  9.         printf("%d",digit);
  10.     else
  11.     				{switch(n%16){
  12. 				case 10:printf("A");
  13. 				break;
  14. 			    case 11:printf("B");
  15. 			    break;
  16. 				case 12: printf("C");
  17. 				break;
  18. 				case 13:printf("D");
  19. 				break;
  20. 				case 14: printf("E");
  21. 				break;
  22. 				case 15: printf("F");
  23. 				break;
  24.     }
  25. }
  26. }
  27.  
  28. int main(void) {
  29.     int n;
  30.     scanf("%d", &n);
  31. if (n == 0)
  32.         printf("0");
  33.     else
  34.         tohex(n);
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout 0s 5324KB
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https://ideone.com/uHz4qg
language:
C99 (gcc 8.3)
created:
6 days ago
visibility:
public

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