01: #include <stdio.h>
02:
03: int fact(int n);
04:
05: int main(void)
06: {
07: int n;
08:
09: printf("n=");
10: scanf("%d", &n);
11: printf("%d!=%d\n", n, fact(n));
12: return 0;
13: }
14:
15: int fact(int n)
16: {
17: int i;
18: int ans = 1;
19: for(i = 2;i <= n;i++)
20: {
21: ans *= i;
22: }
23: return ans;
24: }