ATM程式設計(java)

標籤：password   程式設計   welcome   private   package   

package com.authr.day2;

import java.util.Scanner;

public class ATM2 {

private static String username ="admin";

private static String password= "123";

private static double monery = 10000;

private static String isContinue="y";

static Scanner scanner  = new Scanner(System.in);

public static void main(String[] args) {

welcome();

Login();

}

/***

* 歡迎介面

* 

*/

public static void welcome(){

System.out.println("**********************************");

System.out.println("*********    歡迎進入          ********");

System.out.println("*********  中國建設銀行     *********");

System.out.println("*************    Version1.0*******");

System.out.println("**********************************");

}

/*****

* 

* 登陸判斷

* 

*/

private static void Login() {

for (int i = 3; i >0; i--) {

System.out.println("請輸入帳號:");

String input_username = scanner.next();

System.out.println("請輸入密碼:");

String input_password = scanner.next();

if((!input_username.equals(username) || !input_password.equals(password))&&(i-1)>0 ){

System.out.println("帳號或密碼錯誤!輸入機會還剩下"+(i-1)+"次");

}else if((i-1)==0){

System.out.println("錯誤輸入3次,已吞卡,請聯絡客服.....");

break;

}else {

System.out.println("登陸成功!");

showMenu();

break;

}

}

}

   

/***

* 

* 操作菜單

* 

*/

private static void showMenu() {

while(isContinue.equals("y")){

System.out.println("操作如下\n 1.查詢  2.存款  3.取款  4.修改密碼  5.退出");

int code = scanner.nextInt();

switch(code){

case 1:

showMonery();

break;

case 2:

inputMonery();

break;

case 3:

outMonery();

break;

case 4:

modifyMonery();

break;

case 5:

layout();

break;

default:

System.out.println("非法輸入");

}

}

}

/***

     *

     * 查詢餘額

     * 

     */

private static void showMonery() {

System.out.println("當前餘額為:"+monery);

isContinue();

}

/***

* 

* 存款

* 

*/

private static void inputMonery() {

System.out.println("請輸入要存款的金額:");

double temp_monery = scanner.nextDouble();

if(temp_monery<=0){

System.out.println("輸入金額非法");

}else if(temp_monery>10000){

System.out.println("單次存款最高1萬元");

}else if(temp_monery%100 !=0){

System.out.println("存款的金額必須是100的倍數");

}else{

monery +=temp_monery;

System.out.println("存款成功!當前餘額為:"+monery);

}

isContinue();

}

/***

* 取款

* 

*/

private static void outMonery() {

System.out.println("請輸入要取款的金額:");

double outMonery = scanner.nextDouble();

if(outMonery <=0){

System.out.println("輸入取款的金額非法");

}else if(outMonery>monery){

System.out.println("餘額不足!");

}else if(outMonery>5000){

System.out.println("單次取款不能超過5000元");

}else if(outMonery %100 !=0){

System.out.println("取款的金額必須為100的倍數");

}else{

monery -=outMonery;

System.out.println("取款成功!當前餘額為:"+monery);

}

isContinue();

}

/***

* 

* modify;修改密碼

*/ 

private static void modifyMonery() {

System.out.println("請輸入舊密碼:");

String temp_password = scanner.next();

if(!temp_password.equals(password)){

System.out.println("舊密碼不對!舊密碼為"+password);

}else{

System.out.println("請輸入新密碼:");

String newpass = scanner.next();

System.out.println("請再次輸入新密碼");

String newpass2 = scanner.next();

if(!newpass.equals(newpass2)){

System.out.println("兩次輸入新密碼不一致!");

}else{

password = newpass;

System.out.println("修改密碼成功!當前密碼為:"+password);

}

}

isContinue();

}

/***

* 

* 退出

*/

private static void layout() {

System.out.println("退出成功!");

System.exit(0);

}

/****

* 

* 判斷是否繼續

*/

private static void isContinue(){

System.out.println("是否繼續?(y/n)");

isContinue = scanner.next();

if(isContinue.equals("n")){

System.out.println("程式結束!");

System.exit(0);

}else if(!isContinue.equals("y") && !isContinue.equals("n")){

System.out.println("非法輸入");

isContinue();

}

}

}

本文出自 “ATM程式設計” 部落格，轉載請與作者聯絡！

ATM程式設計(java)