程序代码：

 int b,d;
    scanf("%d",&b);
    while(b>=1 && b<=9)
        {
             d=b;
        }
     while(d>=1)
        {
            b=b*d;
            d=d-1;
        }
    printf("%d",b);
    system("pause");
    return 0;

程序代码：

 int b,d;
    scanf("%d",&b);
    if(b>=1 && b<=9)
        {
             d=b;
        }
     while(d>=1)
        {
            b=b*d;
            d=d-1;
        }
    printf("%d",b);
    system("pause");
    return 0;

程序代码：

#include <iostream>

long factorial(long num)
{
    if (num == 1)
        return 1;
    else
        return num * factorial(num - 1);
}
int main()
{
    int num;
    std::cin >> num;
    printf("%d的阶乘等于  %d\n",num, factorial(num));
}

[此贴子已经被作者于2022-5-28 14:51编辑过]

程序代码：

#include <stdio.h>
long factorial(long num)
{
    if (num == 1)
        return 1;
    else
        return num * factorial(num - 1);
}
int main()
{
    int num = 0, innum = 0;
    printf("请输入需要计算阶乘最大数\n");
    scanf("%d", &innum);
    for(num=1; num<=innum; num++)
    printf("%2d的阶乘等于  %d\n",num, factorial(num));
}

程序代码：

#include <stdio.h>
long factoral(int num)
{
    long x = 1;
    int y = 0;
    for (y = 1; y <= num; y++)
    {
        x = x * y;
    }
    return x;
}
int main()
{
    int num = 0, innum = 0;
    printf("请输入需要计算阶乘最大数\n");
    scanf("%d", &innum);
    for (num = 1; num <= innum; num++)
    {
        printf("%2d的阶乘等于  %d\n", num, factoral(num));
    }
    return 0;
}

程序代码：

#include <stdio.h>

int main()
{
    int b,d=1;
    scanf("%d",&b);
    while(b>=1)
    {
        d*=b;
        b--;
    }
    printf("%d",d);
    return 0;
}

程序代码：

#include <stdio.h>

int main()
{
    int b,d=1;
    scanf("%d",&b);
    for(int i=1;i<=b;i++) d*=i;
    printf("%d",d);
    return 0;
}