案例介绍:
编写一个超市购物程序,在一家超市有牙刷、毛巾、水杯、苹果和香蕉五种商品,用户输入商品序列号进行商品购买,用户输入购买数量后计算出所需要花费的钱,一次购买结束后,需要用户输入“Y”或“N”,“Y”代表继续购买,“N”代表购物结束,此时需要计算并输出本次购物的总计花费的钱。商品价格如下表所示。
运行结果:
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完整代码:文章来源地址https://www.toymoban.com/news/detail-509852.html
import java.util.Scanner;
public class supermarket {
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
double toothbrush = 8.8;//牙刷
double towel = 10;//毛巾
double cup = 18.8;//水杯
double apple = 12.5;//苹果
double banana =15.5;//香蕉
System.out.println("------------黑马小商城------------");
System.out.println("1.牙刷的价格为:"+toothbrush+"元");
System.out.println("2.毛巾的价格为:"+towel+"元");
System.out.println("3.水杯的价格为:"+cup+"元");
System.out.println("4.苹果的价格为:"+apple+"元");
System.out.println("5.香蕉的价格为:"+banana+"元");
System.out.println("--------------------------------");
int item;//购买商品序列号
int count;//购买商品的数量
double total = 0;//购买商品总金额
String good = "商品名";
String goods = "商品量词";
double price = 0;
String choice = "Y";
do{
System.out.print("请输入您需要购买商品的序列号:");
item = scanner.nextInt();
switch (item)
{ //将序列号对应的商品名、商品量词、商品价格分别赋值给good、goods、price
case 1: good = "牙刷"; goods = "把"; price = toothbrush; break;
case 2: good = "毛巾"; goods = "条"; price = towel; break;
case 3: good = "水杯"; goods = "个"; price = cup; break;
case 4: good = "苹果"; goods = "斤"; price = apple; break;
case 5: good = "香蕉"; goods = "斤"; price =banana; break;
default:
item=0;//若序列号输入错误,将item赋值为0
System.out.println("---------商品序列号输入错误---------");
}
if(item!=0) //序列号输入正确,执行if语句
{
System.out.print("请输入您需要购买" + good + "的数量:");
count = scanner.nextInt();
total = total + count * price;
System.out.println("您购买了" + good + count + goods + ",需要花费" + count * price + "元");
}
System.out.print("需要继续购买请输入Y,否则输入N:");
choice = scanner.next();
while(!choice.equals("Y")&&!choice.equals("N"))//若输入字母不为Y或N,则进入while循环
{
System.out.println("--------是否继续购买识别失败--------");
System.out.print("需要继续购买请输入Y,否则输入N:");
choice = scanner.next();
}//输入"Y"循环继续,输入"N"循环退出
}while(choice.equals("Y"));
System.out.println("您本次购物共花费 "+total+" 元");
System.out.println("期待您的下次光临!");
}
}
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