importjava.util.Scanner;publicclass管理员{Stringname;Stringoldpsw;Stringnewpsw;Stringrepsw;Scannerinput=newScanner(System.in);publicvoidChange(){System.out.println("请输入用户名：");Stringinputname=input.next();System.out.println("请输入密码：");Stringinputpsw=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！");}}publicvoidshow(){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");}publicvoidpay(){Stringname="";doubleprice=0.0;intgoodsNo=0;intamount=0;doublediscount=0.8;doubletotal=0.0;doublepayment=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("*******************************************");Stringanswer="y";while("y".equals(answer)){System.out.print("\n请输入商品编号：");goodsNo=input.nextInt();switch(goodsNo){case1:name="可乐";price=3;break;case2:name="雪碧";price=3;break;case3: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));}publicvoidxingyun(){intrandom=(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：");intcustNo=input.nextInt();intbaiwei=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！");}}publicvoidhuangou(){System.out.print("请输入消费金额：");doublemoney=input.nextDouble();doubleextra=0;intchoice=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){case1:if(money>=50){extra=2;}break;case2:if(money>=100){extra=3;}break;case3:if(money>=100){extra=10;}break;case4:if(money>=200){extra=10;}break;case5:if(money>200){extra=20;}break;default:break;}}else{System.out.println("请输入正确的数字！");}}doubletotal=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。");}elseif(choice==2){System.out.println("成功换购："+"500ml可乐一瓶。");}elseif(choice==3){System.out.println("成功换购："+"5公斤面粉。");}elseif(choice==4){System.out.println("成功换购："+"1个苏泊尔炒菜锅。");}elseif(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！");}}}

importjava.util.Scanner;publicclass主体{/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstub管理员XG=new管理员();Scannerinput=newScanner(System.in);Stringaccount="TOM";Stringpwd="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");intKS=input.nextInt();switch(KS){case1:System.out.println("请输入您的账号");StringA=input.next();System.out.println("请输入您的密码");StringB=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");intF=input.nextInt();switch(F){case1:XG.show();break;case2:XG.pay();break;case3:XG.xingyun();break;case4:XG.huangou();}}else{System.out.println("账号密码错误，请重新输入！");}break;case2:XG.name="TOM";XG.oldpsw="123";XG.Change();break;}}}