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  1. #include <stdio.h>
  2.  
  3. void tohex(int n) {
  4.     if (n == 0) {
  5.         return; }
  6.     tohex(n / 16); 
  7.     int x=n%16; 
  8.     if (x<10) {
  9.         printf("%d",x); 
  10.     } 
  11.     else if(x==11){
  12. 		printf("A");
  13.     }
  14.     else if(x==11){
  15.     	printf("B");
  16.     }
  17.     else if(x==12){
  18.     	printf("C");
  19.     }
  20.     else if(x==13){
  21.     	printf("D");
  22.     }
  23.     else if(x==14){
  24.     	printf("E");
  25.     }
  26.     else if(x==15){
  27.     	printf("F");
  28.     }
  29. }
  30.  
  31. int main() {
  32.     int n;
  33.     scanf("%d", &n);
  34.     if (n > 0) {
  35.         printf("16進数表記は");
  36.         tohex(n); 
  37.     } 
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0s 5320KB
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16進数表記はFF
https://ideone.com/1XAJMG
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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