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  1. #include <stdio.h>
  2.  
  3. int fact(int n);
  4.  
  5.  int main (void) {
  6.     int n;
  7.  
  8.     scanf("%d", &n);
  9.     printf("%d\n",fact(n));
  10.     return 0;
  11. }
  12.  
  13. int fact (int n) {
  14.  
  15.     int i;
  16.     int ans=1;
  17.  
  18.     for(i=n-1; i<=n; i++)
  19.         ans*=i;
  20.  
  21.     return ans;
  22.  
  23. }
  24.  
  25.  
Success #stdin #stdout 0s 5316KB
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https://ideone.com/oPmP6b
language:
C (gcc 8.3)
created:
19 hours ago
visibility:
public

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