c - 我找到阶乘的 C 程序没有给我想要的结果

Question

这是我的代码:

#include <stdio.h>

void main() {
    int n, f = 1;
    printf("enter any number: ");
    scanf("%d", &n);
    while (n > 0) {
        f = f * n;
        n = n - 1;
    }
    printf("factorial of %d is %d", n, f);
}

它给了我一个结果:

enter any number: 5factorial of 0 is 120

Answer 1

只需保存原始输入:

#include<stdio.h>
void main()
{
    int n,n1,f=1;
    printf("enter any number: ");
    scanf("%d",&n1);
    n = n1;
    while(n>0)
    {
        f=f*n;
        n=n-1;
    }
    printf("factorial of %d is %d",n1,f);
}