无法弄清楚为什么值没有改变

Question

我是 OOP 和 C# 的新手。

我曾尝试使用继承和封装概念，但卡住了。

无法弄清楚为什么当我通过 Atm_1 class.

调用 Deposit 方法时它不起作用

parent class

  class Atm
  {

    public int TotalBalance { get; private set; } = 1000;

    public Atm() { }

    public void DepoSit(int deposit)  { TotalBalance += deposit; }  

  }

child class

  class Atm_1:Atm 
  {

  }

主要

 class Program
 {

    static void Main()
    {


        var atm = new Atm();
        var atm_1 = new Atm_1();

       //Before Deposit 
        Console.WriteLine("Total Balance is "+atm.TotalBalance);     //1000

        //Deposit
        atm_1.DepoSit(20);

        //After Deposit
        Console.WriteLine("Total Balance is " + atm.TotalBalance);   //Still 1000 ??



        atm.DepoSit(500);
        Console.WriteLine("Total Balance is " + atm.TotalBalance);   //Now 1500
        //This Works -why the above didn't work?  

    }
}

Answer 1

Atm_1继承了Atm的属性TotalBalance、构造函数Atm()和方法DepoSit(int deposit)，但没有继承你设置的数据至 new Atm();。

Atm_1 和 Atm 是同一 class 的两个不同实例。尝试将对象 Amt_1 和 Amt 可视化为变量，设置一个变量数据不会更改其他数据。

Answer 2

From Peter Dunniho Comments, I can figure out what i need to do is to create an array instead. Thanks for all comments and answers :)

class Program
{
    static void Main(string[] args)
    {

        Atm[] atm = new Atm[3];

        atm[0] = new Atm(50);
        atm[1] = new Atm(100000);
        atm[2] = new Atm(25);

        int totalBalance=0;

       for( int i=0;i<atm.Length;i++)
        {
            totalBalance += atm[i].Balance;
        }

        Console.WriteLine("TotalBalance is "+totalBalance.ToString("c"));


        Console.ReadKey();


    }
}



class Atm
{
    public int Balance { get; private set; }

    public Atm(int balance)
    {
         Balance=balance;
    }

}

无法弄清楚为什么值没有改变

Can't figue out why the value didn't change

c#

inheritance

encapsulation