ATM程序设计

package com.arthur.object;

import java.util.Scanner;

/***
* 简单的ATM存取款程序 1.登陆页面 2.登陆 3.菜单：1,查询，2，存款，3，取款，4，修改密码，5退出 初始密码：123 用户名：admin
*/
public class ATM2 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

// 1.输出登陆页面

String pwd = "";
String pass = "";// 密码
double monnery = 12000;
String go = "y";
int end = 0;
for (int i = 1; i < 5; i++) {
// 判断密码输入次数

// 判断密码登陆
if (i > 3) {
System.out.println("密码输入次数过多，请稍后再试......");
break;
}

System.out.println("请输入密码");

pass = scanner.next();
if (!pass.equals("123")) {
System.out.println("输入错误,请重新输入");
} else {

System.out.println("登陆成功！");// 判断密码登陆结束
System.out.println("\t**************\t\t\t\t\t****************");
System.out.println("******************************\tATM取款程序\t********************************");
System.out.println("\t**************\t\t\t\t\t****************");
break;
}
}
do {
System.out.println("业务如下:");
System.out.println("1.查询 2.存款 3.取款 4.修改密码 5.退出");
System.out.println("请输入相对应的业务代码:");
int select = scanner.nextInt();
switch (select) {
case 1:// 查询余额
System.out.println("余额是:" + monnery + "元");
break;
case 2:// 存款
System.out.println("请输入金额:");
double deposit = scanner.nextDouble();// 存款
if (deposit <= 0) {
System.out.println("金额不能为负数");
continue;
}
if (deposit % 100 != 0) {
System.out.println("存款金额必须为100倍数");
continue;
}
monnery += deposit;
System.out.println("存款成功,余额为:" + monnery + "元");
break;
case 3:// 取款
System.out.println("请输入金额:");
double withdraw_money = scanner.nextDouble();

if (withdraw_money < 0) {
System.out.println("取款不能为负数！");
continue;
}
if (withdraw_money % 100 != 0) {
System.out.println("取款必须为100倍数");
continue;
}


if (withdraw_money > 10000 ) {
System.out.println("每次取款不能超过1000元");
continue;
}
if(withdraw_money > monnery){
System.out.println("余额不足！");
}

monnery -= withdraw_money;// 取款
System.out.println("取款成功,剩余金额为:" + monnery + "元");
break;
case 4:// 修改密码
System.out.println("请输入原密码:");
pass = scanner.next();
if (pass.equals("123")) {
System.out.println("请输入新密码:");
String new_pass = scanner.next();
System.out.println("请再次输入新密码:");
String new2_pass = scanner.next();
if (new_pass.equals(new2_pass)) {// 比较两次输入新密码是否相同
pass = new_pass;
System.out.println("密码修改成功！新密码为:" + new_pass);
} else {
System.out.println("密码修改失败！");
}
} else {
System.out.println("原密码不对...");
}
break;
case 5:

end = -1;
break;
default:
System.out.println("输入操作代码不对，请重新输入");

break;

}
if (end == -1) {
System.out.println("退出成功！");
break;
}
if (end != -1) {
System.out.println("是否继续?（y/n）");
go = scanner.next();
}

} while (go.equals("y"));

if (go.equals("n")) {
System.out.println("退出成功！");
}

}

}