文章标题

来源：互联网发布：vr全景合成软件编辑：程序博客网时间：2024/06/11 00:08

package com.hxzy.string;

import java.util.Scanner;

/登录验证通过后，显示批发商品信息; 输入批发商品编号和数量，以指定格式显示总金额/

public class Demo11 {

public static void main(String[] args) {
Scanner input = new Scanner(System.in);

    user1 p1 = new user1();//新建对象    boolean flag;  //定义个开关    do {        System.out.print("请输入用户名：");        String name = input.next();        System.out.print("请输入密码：");        String pwd = input.next();        flag = p1.show(name, pwd);//调用方法    } while (flag);    System.out.println("********欢迎进入商品批发城********");    System.out.println("\t编号" + "\t商品" + "\t价格");    System.out.println("\t1" + "\t电风扇" + "\t124.23");    System.out.println("\t2" + "\t洗衣机" + "\t4,500.0");    System.out.println("\t3" + "\t电视机" + "\t8,800.9");    System.out.println("\t4" + "\t冰箱" + "\t5,000.8");    System.out.println("\t5" + "\t空调" + "\t4,456.0");    System.out.println("*********************************");    System.out.print("请输入商品编号：");    int num1 = input.nextInt();    System.out.print("请输入批发数量：");    int num2 = input.nextInt();

//将整形转化成字符串
String st1 = String.valueOf(p1.showprice(num1, num2));
//将String转化成StringBuffer
StringBuffer sb = new StringBuffer(st1);
//找到 . 的位置隔3个位置给个，号
for (int i = sb.indexOf(“.”) - 3; i > 0; i = i - 3) {
sb.insert(i, “,”);
}
System.out.print(“你需要付款：” + sb + “元”);
}

}

class user1 {

public boolean show(String name, String pwd) {    boolean flag = false;    if (name.equals("TOM") && pwd.equals("123")) {        System.out.println("登陆成功");    } else {        System.out.println("用户名或密码错误");        flag = true;    }    return flag;}// int num1 表示商品编号// int num2 表示批发数量public double showprice(int num1, int num2) {    double money = 0.0;    switch (num1) {    case 1:        money = (num2 * 124.23);        break;    case 2:        money = (num2 * 4500.0);        break;    case 3:        money = (num2 * 8800.9);        break;    case 4:        money = (num2 * 5000.88);        break;    case 5:        money = (num2 * 4456.0);        break;    default:        System.out.println("你输入的商品编号不存在");    }    return money;}

}

阅读全文

0 0