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Java商品换购代码,java购买商品代码

IP云V管理员/2022-11-26/4 阅读

11/26

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java购物代码怎么把消费金额。。解码后输多少变到？？位置，还得加活动1的钱2快下面有图！！

import java.util.Scanner;

public class GoShopping {

public static void main(String[] args) {

double sum=0;

Scanner input = new Scanner(System.in);

System.out.println("请输入消费金额：");

double money = input.nextDouble();

System.out.println("是否参加优惠活动：");

System.out.println("1：满50元，加2元可换购百事可乐饮料一瓶");

System.out.println("2：满100元，加3元可换购500ml可乐一瓶");

System.out.println("3：满100元，加10元可换购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.println("请选择：");

int num = input.nextInt();

switch (num) {

case 0:

System.out.println("不换购！");

break;

case 1:

sum=money+2;

System.out.println("本次消费总金额："+sum);

System.out.println("成功换购：百事可乐一瓶！");

break;

case 2:

sum=money+3;

System.out.println("本次消费总金额："+sum);

System.out.println("成功换购：500ml可乐一瓶！");

break;

case 3:

sum=money+10;

System.out.println("本次消费总金额："+sum);

System.out.println("成功换购：5公斤面粉！");

break;

case 4:

sum=money+10;

System.out.println("本次消费总金额："+sum);

System.out.println("成功换购：苏泊尔炒菜锅!");

break;

case 5:

sum=money+20;

System.out.println("本次消费总金额："+sum);

System.out.println("成功换购：欧莱雅爽肤水一瓶！");

break;

default:

System.out.println("操作有误！请核对后输入！");

break;

}

}

}

要定义一个变量来接收消费总金额不能直接写成这样：

System.out.println("本次消费总金额："+money+2);

这样只是把两个数连接起来（+号起连接作用）而不是求和

相关问答

Q1: 用JAVA编写购物系统的代码是什么？（急）

算是最简单的吧

package cn.job01;

import java.util.Scanner;

public class Lx07 {

public static void choice() {

System.out.println("登陆菜单 ");

System.out.println("1登陆系统");

System.out.println("2退出");

}

static void choice1() {

System.out.println("购物管理系统客户信息");

System.out.println("1显示所有客户信息");

System.out.println("2添加客户信息");

System.out.println("3修改客户信息");

System.out.println("4查询客户信息");

}

static void choice2() {

System.out.println("购物管理系统真情回馈");

System.out.println("1幸运大放送");

System.out.println("2幸运抽奖");

System.out.println("3生日问候");

}

public static void main(String[] args) {

choice();

Scanner input = new Scanner(System.in);

System.out.println("请输入1or2");

int num = input.nextInt();

switch (num) {

case 1:

System.out.println("主菜单");

System.out.println("1客户信息管理");

System.out.println("2购物结算");

System.out.println("3真情回馈");

System.out.println("4注销");

break;

}

System.out.println("选择输入数字");

int num1 = input.nextInt();

switch (num1) {

case 1:

choice1();

break;

case 2:

System.out.println("购物结算");

break;

case 3:

choice2();

break;

case 4:

choice();

break;

}

}

}

Q2: java简单的购物车代码

package Test;

import java.util.LinkedHashMap;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Scanner;

public class Test {

public static void main(String[] args) {

init();//初始化

MapString,String map = new LinkedHashMap();

while(true){

Scanner in= new Scanner(System.in);

map = buy(in,map);//选择

System.out.println();

System.out.println("还要继续购物吗?(Y/N)");

String jx = in.nextLine();

if(jx.equals("N")){

break;

}

}

print(map);

}

public static void print(MapString, String m){

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

System.out.println(" 购物车清单");

Integer hj = 0;

for (EntryString, String entry : m.entrySet()) {

String key = entry.getKey();

String value = entry.getValue();

if(key.equals("1")){

hj += Integer.parseInt(value)*3;

System.out.println("哇哈哈纯净水: "+value+"件，合计：￥"+Integer.parseInt(value)*3);

}else if(key.equals("2")){

hj += Integer.parseInt(value)*5;

System.out.println("康师傅方便面: "+value+"件，合计：￥"+Integer.parseInt(value)*5);

}else if(key.equals("3")){

hj += Integer.parseInt(value)*4;

System.out.println("可口可乐: "+value+"件，合计：￥"+Integer.parseInt(value)*4);

}

}

System.out.println("合计金额:￥"+hj);

}

public static void init(){

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

System.out.println("\t商品列表\n");

System.out.println(" 商品名称价格");

System.out.println("1. 哇哈哈纯净水￥3");

System.out.println("2. 康师傅方便面￥5");

System.out.println("3. 可口可乐￥4");

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

}

public static MapString,String buy(Scanner scan,MapString,String m){

System.out.print("请输入编号:");

String bh = scan.nextLine();

System.out.print("请输入购买数量:");

String num = scan.nextLine();

if(m.size()0 m.keySet().contains(bh)){

m.put(bh,(Integer.parseInt(bh)+Integer.parseInt(num))+"");

}else{

m.put(bh, num);

}

return m;

}

}

Q3: 求高手给我个参考代码，我做半天没做出来。java的一个换购系统，题目如下

import java.util.Scanner; public class ChangeGoods { public static void main(String[] args) { System.out.println("输入消费金额："); Scanner scanner = new Scanner(System.in); String money = scanner.next(); int spendMoney = Integer.parseInt(money); System.out.println( "是否参加优惠换购活动?\n" + "1：满50元，加2元换购百事可乐饮料1瓶\n" + "2：满100元，加3元换购500ml可乐一瓶\n" + "3：满100元，加10元换购5公斤面粉\n" + "4：满200元，加10元可换购1个苏泊尔炒菜锅\n" + "5：满200元，加20元可换购欧莱雅爽肤水一瓶\n" + "0：不换购\n" + "请选择：" ); Scanner scannerInput = new Scanner(System.in); String select = scanner.next(); int option = Integer.parseInt(select); switch (option) { case 0: System.out.println("本次消费总金额：" + money); break; case 1: if(spendMoney=50){ System.out.println("本次消费总金额：" + (spendMoney + 2) ); System.out.println("成功换购：百事可乐饮料1瓶"); } break; case 2: if(spendMoney=100){ System.out.println("本次消费总金额：" + (spendMoney + 3) ); System.out.println("成功换购：500ml可乐一瓶"); } break; case 3: if(spendMoney=100){ System.out.println("本次消费总金额：" + (spendMoney + 10) ); System.out.println("成功换购：5公斤面粉"); } break; case 4: if(spendMoney=200){ System.out.println("本次消费总金额：" + (spendMoney + 10) ); System.out.println("成功换购：1个苏泊尔炒菜锅"); } break; case 5: if(spendMoney=200){ System.out.println("本次消费总金额：" + (spendMoney + 20) ); System.out.println("成功换购：欧莱雅爽肤水一瓶"); } break; default: break; } } }

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