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  1. #include <stdio.h>
  2.  
  3. void tohex(int n) {
  4.     if(n==0){
  5.         return;
  6.     }
  7.     tohex(n/16);
  8.     int digit=n%16;
  9.     if(digit<10){
  10.         printf("%d",digit);
  11.     }else{
  12.         printf("%c",'A'+(digit-10));
  13.     }
  14. }
  15.  
  16. int main(void) {
  17.     int a;
  18.     printf("正の整数を入力してください: ");
  19.     scanf("%d", &a);
  20.  
  21.     if (a == 0) {
  22.         printf("0\n");
  23.     } else if (a > 0) {
  24.         tohex(a);
  25.         printf("\n");
  26.     } else {
  27.         printf("正の整数を入力してください。\n");
  28.     }
  29.  
  30.     return 0;
  31. }
  32.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
254
stdout 
正の整数を入力してください: FE
https://ideone.com/O4XmEn
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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