变量定义在主函数外面

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 变量定义在main函数外面
{
class Program
{
public int a;//变量定义在外面

struct student
{
public int sno;
public string name;
public string sex;
}

static void Main(string[] args)
{
Program pro = new Program();
Console.Write("请输入班级人数：");
pro.a= int.Parse(Console.ReadLine());
double []fenshu=new double[pro.a];

student stu=new student();//结构体初始化类，绿色的表示类

Console.ReadLine();
}
}
}