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  1. #include <stdio.h>
  2.  
  3. long long fact(int n) {
  4.     long long f = 1;
  5.     int i;
  6.  
  7.     for (i = 1; i <= n; i++) {
  8.         f *= i;
  9.     }
  10.  
  11.     return f;
  12. }
  13.  
  14. int main(void) {
  15.     int n;
  16.  
  17.     printf("正の整数を入力してください: ");
  18.     scanf("%d", &n);
  19.  
  20.     printf("%d! = %lld\n", n, fact(n));
  21.  
  22.     return 0;
  23. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
4
stdout 
正の整数を入力してください: 4! = 24
https://ideone.com/YzZxZu
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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