bank.java

一个模拟银行ATM提款算法

import java.io.*;
public class Bank 
{
	public static void main(String[] args) 
	{	
		int balance=0;
		new IdText();
		do
		{
			System.out.println("请输入操作序号：1.存款；2.取款；3.查询余额；4.显示账号");
			//new ChoiceCase();
			InPut thisInPut=new InPut();
			switch(thisInPut.num)
			{
			case 1:
				System.out.print("输入金额：");
				InPut thisInPut1=new InPut();
				balance+=thisInPut1.num;
				break;
			case 2:
				System.out.print("输入金额：");
				InPut thisInPut2=new InPut();
				if(balance<thisInPut2.num)
				{
					System.out.println("余额不足，请重新输入");
					break;
				}
				balance-=thisInPut2.num;
				break;
			case 3:
				System.out.println("银行余额："+balance);
				break;
			case 4:
				new IdText();
				break;
			default:System.out.println("操作错误，请重新输入");
			}
		}
		while (true);
	}
}
class IdText
{
	IdText()
	{
	System.out.println("账号：Ap0506426");
	System.out.println("姓名：叶光廷");
	System.out.println("开户时间：2008-10-10");
	System.out.println("身份证号码：0506426");
	}
}
/*class NoChoice
{
	void NoChoice()
	{
		System.out.println("请输入操作序号：1.存款；2.取款；3.查询余额；4.显示账号");
		ChoiceCase myChoiceCase=new ChoiceCase();
	}
}*/
/*class ChoiceCase
{
	InPut thisInPut=new InPut();
	ChoiceCase()
	{		
			switch(thisInPut.num)
			{
			case 1:
				System.out.print("输入金额：");
				InPut thisInPut1=new InPut();
				balance=50;
				break;
			case 2:
				System.out.print("输入金额：");
				InPut thisInPut2=new InPut();
				thisInPut2.num;
				break;
			case 3:
				System.out.println("银行余额："+balance);
				break;
			case 4:
				new IdText();
				break;
			default:System.out.println("操作错误，请重新输入");
			}
	}
}*/
class InPut
{
	public int num;
	InPut()
	{
	try
		{
			BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
			num=Integer.parseInt(br.readLine());
		}
	catch (IOException e)
		{
			System.err.println(e.toString());
		}
	}
}