5-9

#include<stdio.h>
double fact_s(int n);
int main(void)
{
    int i,n;
    printf("Input n:");
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        printf("%3d!=%.0f\n",i,fact_s(i));
    return 0;
}
double fact_s(int n)
{
    static double f=1;
    f=f*n;
    return (f);
}