階乘遞歸實現

# include <stdio.h>

//假定n的值是1或大於1的值
long f(long n)
{
    if (1 == n)
        return 1;
    else
        return f(n-1) * n;

}

int main(void)
{
    printf("%ld\n", f(100));

    return 0;
}