模拟银行ATM存款存取款的相关功能
具体需求：
模拟.3张银行卡,1001,1002,1003,分别设置密码和余额(可以用9个变里分别保存卡号.密码和余额)提示用户输入银行卡和密码如果用户输入正确—提示让用户选择取款﹒存款还是退出,并提示余额多少﹔若输入错误—重新输入卡号密码;选择取款–-~提示输入取款额度,如果超过余额,提示余额不足;否则,在余额上减掉相应金额;选择存款—输入存款额度,余额加上相应额度,并提示余额多少;选择退出–―退卡限制3次输入错误账号密码,提示银行卡已被锁定
上代码
public class ATM {public static void main(String[] args) {// TODO Auto-generated method stubScanner input = new Scanner(System.in);String cid1 = "1001";String cpassWord1 = "123456";double cbalance1 = 1000;String cid2 = "1002";String cpassWord2 = "123456";double cbalance2 = 1000;String cid3 = "1003";String cpassWord3 = "123456";double cbalance3 = 1000;int count = 0; //统计连续输出错误次数while(true) {System.out.println("--------------ATM-----------------");//登录功能double balance = 0;System.out.println("请输入账号: ");String id = input.next();System.out.println("请输入密码: ");String pwd = input.next();if(id.equals(cid1) && pwd.equals(cpassWord1)) {balance = cbalance1;}else if(id.equals(cid2) && pwd.equals(cpassWord2)) {balance = cbalance2;}else if(id.equals(cid3) && pwd.equals(cpassWord3)) {balance = cbalance3;}else {count++;if(count == 0) {System.out.println("您已经输入三次，账号被锁定");}else {System.out.println("您已经输入"+count+"次，还有"+(3 - count)+"次机会");continue;}}count = 0; //当在3次以内输入正确后，要清零，否则下一个账号会保存上一个账号输入错误次数//具体业务while(true) {System.out.println("请输入要办理业务编号：1.存款 2.取款 3.退卡");int flag = input.nextInt();if(flag == 1) {//控制存款业务while(true) {System.out.println("您的余额"+balance+"元，请输入您要存款金额：");double money1 = input.nextDouble();if(money1 <= 0) {System.out.println("您输入金额有误，不能小于等于0");continue;}else {balance += money1;System.out.println("您存款"+money1+"元，您的余额"+balance+"元");break;}}}else if(flag == 2) {//控制存款业务while(true) {System.out.println("您的余额"+balance+"元，请输入您要取款金额：");double money2 = input.nextDouble();if(money2 > balance) {System.out.println("您输入金额有误，不能大于等于现在余额");continue;}else {balance -= money2;System.out.println("您取款"+money2+"元，您的余额"+balance+"元");break;}}}else if(flag == 3){break;//退卡,重新输入卡号和密码}else {System.out.println("没有此业务，请重新选择");continue;}}}}}
