计算阶乘
#include<stdio.h>
long Fact(int n);
int main()
{
int n;
long ret;
printf(“Input n:”);
scanf_s("%d", &n);
ret = Fact(n);
printf("%d!=%ld\n", n, ret);
return 0;
}
long Fact(int n)
{
int i;
long result = 1;
for (i = 2; i <= n; i++)
{
result *= i;
}
return result;
}