用java写我行我素购物系统
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import java.util.Scanner;public class 管理员 {String name;String oldpsw;String newpsw;String repsw;Scanner input=new Scanner(System.in);public void Change(){System.out.println("请输入用户名:");String inputname=input.next();System.out.println("请输入密码:");String inputpsw=input.next();if(inputname.equals(name)&&inputpsw.equals(oldpsw)){System.out.println("请输入新密码");newpsw=input.next();System.out.println("请再次输入密码");repsw=input.next();if(newpsw.equals(repsw)){System.out.println("密码修改成功!");oldpsw=newpsw;}while(!(newpsw.equals(repsw))){System.out.println("密码输入错误,请重新输入!");System.out.println("请输入您的新密码:");newpsw=input.next();System.out.println("请再次输入新密码");repsw=input.next();}System.out.println("密码修改成功!");}else{System.out.println("您的账号密码输入有误,请重新输入!");}}public void show(){System.out.println("名称"+"\t\t价格");System.out.println("可乐330ml"+"\t3元");System.out.println("雪碧330ml"+"\t3元");System.out.println("电饭锅"+"\t\t300元");}public void pay(){String name = "";double price = 0.0;int goodsNo = 0;int amount = 0;double discount = 0.8;double total = 0.0;double payment = 0.0;System.out.println("*******************************************");System.out.println("请选择购买的商品编号:");System.out.println("1.可乐 2.雪碧 3.电饭锅");System.out.println("*******************************************");String answer = "y";while("y".equals(answer)){System.out.print("\n请输入商品编号:");goodsNo = input.nextInt();switch(goodsNo){case 1:name = "可乐";price = 3;break;case 2:name = "雪碧";price = 3;break;case 3:name = "电饭锅";price = 300;break;}System.out.print("请输入购买数量:");amount = input.nextInt();System.out.println(name+ "¥" + price +"\t数量 " + amount+ "\t合计 ¥" + price*amount);total += price*amount;System.out.print("是否继续(y/n)");answer = input.next();}System.out.println("\n折扣:" + discount);System.out.println("应付金额:" +total*discount);System.out.print("实付金额:");payment = input.nextDouble();while(payment - total*discount < 0){System.out.print("您输入的金额小于应付金额,请重新输入:");payment = input.nextDouble();}System.out.println("找钱:" + (payment - total*discount));}public void xingyun(){int random = (int) (Math.random() * 10);System.out.println("我行我素购物管理系统 > 幸运抽奖\n");System.out.print("请输入4位会员号: ");int custNo = input.nextInt();int baiwei = custNo / 100 % 10;if (baiwei == random) {System.out.println(custNo + "是幸运客户,获精美Mp3一个。");} else {System.out.println(custNo + " 谢谢您的支持!");}}public void huangou(){System.out.print("请输入消费金额:");double money = input.nextDouble();double extra = 0; int choice = 0; if(money>=50){System.out.println("是否参加优惠换购活动:");System.out.println("1:满50元,加2元换购百事可乐饮料1瓶");System.out.println("2:满100元,加3元换购500ml可乐一瓶");System.out.println("3:满100元,加10元换购5公斤面粉");System.out.println("4:满200元,加10元可换购1个苏泊尔炒菜锅");System.out.println("5:满200元,加20元可换购欧莱雅爽肤水一瓶");System.out.println("0:不换购");System.out.print("请选择:");if(input.hasNextInt()==true){choice = input.nextInt();switch(choice){case 1:if(money>=50){extra = 2;}break;case 2:if(money>=100){extra = 3;}break;case 3:if(money>=100){extra = 10;}break;case 4:if(money>=200){extra = 10;}break;case 5:if(money>200){extra = 20;}break;default:break;}}else{System.out.println("请输入正确的数字!");}}double total = money + extra;System.out.println("本次消费总金额:"+ total);if(choice == 1){System.out.println("成功换购:" + "百事可乐饮料1瓶。");}else if(choice ==2 ){System.out.println("成功换购:" + "500ml可乐一瓶。");}else if(choice == 3){System.out.println("成功换购:" + "5公斤面粉。");}else if(choice == 4){System.out.println("成功换购:" + "1个苏泊尔炒菜锅。");}else if(choice == 5){System.out.println("成功换购:" + "欧莱雅爽肤水一瓶。");}else {System.out.println("无换购项目!");}}}
import java.util.Scanner;public class 主体 {public static void main(String[] args) {// TODO Auto-generated method stub管理员 XG=new 管理员();Scanner input=new Scanner(System.in);String account="TOM";String pwd="123";System.out.println("请选择!");System.out.println("1.登录我行我素管理系统");System.out.println("2.修改管理员密码");int KS=input.nextInt();switch(KS){case 1:System.out.println("请输入您的账号");String A=input.next();System.out.println("请输入您的密码");String B=input.next();if(account.equals(A)&&pwd.equals(B)){System.out.println("登录成功!");System.out.println("欢迎进入我行我素~~");System.out.println("***************************");System.out.println("请选择您的选项");System.out.println("****************************");System.out.println("1.查询商品价格");System.out.println("2.购物结算计算");System.out.println("3.幸运抽奖");System.out.println("4.商品换购");int F=input.nextInt();switch(F){case 1:XG.show();break;case 2:XG.pay();break;case 3:XG.xingyun();break;case 4:XG.huangou();}}else{System.out.println("账号密码错误,请重新输入!");}break;case 2:XG.name="TOM";XG.oldpsw="123";XG.Change();break;}}}
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