Question

帮忙写一下Java中while循环语句的代码，题目请看补充

商品列表：
1.网球鞋￥320 2.网球拍￥200 3.T恤￥100
请选择购买的商品编号:
接收输入的商品编号：
请记录购买的商品个数
请将购物的总金额算出。
每完成一次购买提问用户是否继续购买
求高手写一下这个代码，刚学玩这个，没有思路啊！！

Answer 1

public static void main(String args[]) {
boolean isC = true;// 是否继续购买
int money = 0;// 总价
int goods1 = 0;// 商品1
int goods2 = 0;// 商品2
int goods3 = 0;// 商品3
BufferedReader br = null;
try {
while (isC) {
int price = 0;
System.out.println("请选择购买的商品编号:");
br = new BufferedReader(new InputStreamReader(System.in));
int num1 = Integer.parseInt(br.readLine());
System.out.println("请选择购买的商品数理:");
br = new BufferedReader(new InputStreamReader(System.in));
int num2 = Integer.parseInt(br.readLine());
System.out.println(num1);
switch (num1) {
case 1:
price = 320 * num2;
goods1 = goods1 + num2;
break;
case 2:
price = 200 * num2;
goods2 = goods2 + num2;
break;
case 3:
price = 100 * num2;
goods3 = goods3 + num2;
// default:System.out.println("您选择的商品不存在!");;1
}
money = money + price;
System.out.println("是否继续购买:Y/N");
br = new BufferedReader(new InputStreamReader(System.in));
String str = br.readLine();
if ("Y".equals(str)) {
isC = true;
} else {
isC = false;
}
}
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("你购买了如下商品:");
if(goods1>0){
System.out.println("网球鞋:"+goods1);
}
if(goods2>0){
System.out.println("网球拍:"+goods2);
}
if(goods3>0){
System.out.println("T恤:"+goods3);
}
System.out.println("总价:"+money);
}

追问

谢谢你，我把你的也看了一遍。你写的这个更人性化了，不愧是高手。受教了！

Answer 2

    while(true){
        System.out.println("请选择购买的商品编号:");
        BufferedReader str1=new BufferedReader(new InputStreamReader(System.in));
        int a=Integer.parseInt(str1.readLine());
        BufferedReader str2=new BufferedReader(new InputStreamReader(System.in));
        int b=Integer.parseInt(str2.readLine());
        int sum = a*b;
        System.out.println("用户是否继续购买(Y/N)?");
        BufferedReader str3=new BufferedReader(new InputStreamReader(System.in));
        if(str3.equles("N")){
            break;
        }
    }
}

大致代码如上，简单的写了下  如果严谨一点应该捕获转换异常，并且判断用户输入的内容是否正确

Answer 3

import java.util.Scanner;
public class Test{
    public static void main(String args[]){
    	System.out.println("\n\n商品列表");
    	String str="1:人妖 1320,2:小姐 300,3:少爷 800";
    	System.out.println(str);
    	Scanner can = new Scanner(System.in);
    	Boolean flag = true;
    	while(flag){
	    	System.out.println("请选择购买的商品编号:");
	    	int index = can.nextInt();
	    	System.out.println("请选择购买的数量:");
	    	int num = can.nextInt();
	    	System.out.println("你点的总价:"+(Integer.parseInt(str.split(",")[index-1].split(" ")[1])*num));
	    	System.out.println("是否继续享受?");
	    	String f = can.next();
	    	if(f.equals("是")){
	    		flag = true;
	    	}else{
	    		flag = false;
	    	}
    	}
    }
}

Answer 4

public static void main(String[] args){
double sum=0;
boolean YsOrNo=true;
int danjia=0;
String bianhao;
while(YsOrNo){
Scanner sc=new Scanner(System.in);
System.out.println("Please enter 编号: ");
bianhao=sc.next();
System.out.println("Please enter 数量: ");
int num=Integer.parseInt(sc.next());
if(bianhao.equals("1")){
danjia=320;
}else if(bianhao.equals("2")){
danjia=200;
}else if(bianhao.equals("2")){
danjia=100;
}
sum+=danjia*num;
System.out.println("是否继续购买（Y/N）? ");
if(sc.next().equals("N")){
YsOrNo=false;
System.out.println("总金额是："+sum);
break;
}else{
continue;
}
}
}

Answer 5

package tt;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.omg.CORBA.PUBLIC_MEMBER;

public class dee {
public static void main(String[] args) throws NumberFormatException, IOException {
int productId=0;
int numberProduct=0;
boolean continue_shop=true;
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
String string=null;
while(continue_shop)
{
System.out.println("1.网球鞋￥320 2.网球拍￥200 3.T恤￥100");
System.out.println("输入产品号：");
productId=Integer.parseInt(in.readLine());
System.err.println("输入数量：");
numberProduct=Integer.parseInt(in.readLine());
System.out.println("金额："+getPrice(productId, numberProduct));
System.out.println("yes/no?");
if(!in.readLine().toUpperCase().equals("YES"))
{
continue_shop=false;
}
}
}
public static int getPrice(int productId,int numberProduct)
{
int i=0;
switch (productId) {
case 1:i=320*numberProduct;
break;
case 2:i=200*numberProduct;
break;
case 3:i=100*numberProduct;
break;
}
return i;
}
}