Ŀ

գҪıйص䡣
Ӽһn n! ֵҪ͵úfact(n)n!βnintdouble
ʾ˵
5        (n=5)
5! = 120.000000



#include <stdio.h>
int main(void)
{    
    int n;
    double factorial;
    double fact(int n);

    scanf ("%d", &n);
/*---------*/
    printf("%d! = %f\n", n, factorial);
}

/*---------*/

