老师 们看看 C# C#C#

Question

要求输入的数在1-20 ； 输入一个数 ，求其阶乘
这是小生我的 ；老师看看错在那儿了
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication10
{
class Program
{
static void Main(string[] args)
{
int c;
c = Convert.ToInt32(Console.ReadLine());
getways.jiecheng(c);
Console.WriteLine(getways.z);

    }
}
class getways
{
    public static int z;
    public static int jiecheng(int x)
    {

        if (x > 20)
        {
            Console.WriteLine("cuowu");

        }

        if (x == 1)
        {
            return x;
        }
        z = x * getways.jiecheng(z - 1);
        return z;
    }
} 

}

Answer 1

 z = x * getways.jiecheng(z - 1);
 改成
 z = x * getways.jiecheng(x - 1);