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  1. #include <stdio.h>
  2.  
  3. void soinsu(int x){
  4.  
  5.     static int i = 2;
  6.     static int kaisu = 0;
  7.  
  8.     for( ; i <= x ; i++){
  9.         if(x % i == 0){
  10.  
  11.             if(kaisu == 0){
  12.                 printf(" %d",i);
  13.                 kaisu++;
  14.             }
  15.             else{
  16.                 printf(" × %d",i);
  17.             }
  18.  
  19.             soinsu(x / i);
  20.  
  21.             break;
  22.         }
  23.     }
  24. }
  25.  
  26.  
  27. int main(void){
  28.  
  29.     int n;
  30.  
  31.     do{
  32.     printf("3以上の整数を入力してください：");
  33.     scanf("%d",&n);
  34.     printf("%d\n",n);
  35.     }while(n<3);
  36.  
  37.     printf("%d =",n);
  38.     soinsu(n);
  39.  
  40.     return 0;
  41. }
Success #stdin #stdout 0.01s 5476KB
comments (?)
stdin
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2
999
stdout
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3以上の整数を入力してください：2
3以上の整数を入力してください：999
999 = 3 × 3 × 3 × 37
https://ideone.com/nIFSY1
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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