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  1. #include <stdio.h>
  2.  
  3. int first = 1;  
  4.  
  5. void factor(int n) {
  6.     if (n == 1) {
  7.         return;
  8.     }
  9.     else {
  10.         for (int i = 2; i <= n; i++) {
  11.             if (n % i == 0) {
  12.                 if (first) {
  13.                     printf("%d", i);
  14.                     first = 0;
  15.                 } else {
  16.                     printf("×%d", i);
  17.                 }
  18.                 factor(n / i);
  19.                 break;
  20.             }
  21.         }
  22.     }
  23. }
  24.  
  25. int main() {
  26.     int n;
  27.     scanf("%d", &n);
  28.     printf("%d=", n, n);
  29.     factor(n);
  30.     return 0;
  31. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin
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30
stdout
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30=2×3×5
https://ideone.com/Ev1geT
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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