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import java.util.Scanner;
 
public class A03 {
 
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner (System.in);
        System.out.println("****************************************");
        System.out.println("请选择购买的商品编号:");
        System.out.println("1.T恤\t2.网球拍\t3.网球拍");
        System.out.println("****************************************\n\n");
        String A="y";
        String name="";
        double money=0;
        while (A.equals("y")){
        System.out.print("请输入商品编号:");
        int No= input.nextInt();
        System.out.print("请输入购买数量:");
        int number=input.nextInt();
        switch (No) {
        case 1:
            name="T恤";
            money+=245*number;
            break;
        case 2:
            name="网球鞋";
            money+=570*number;
            break;
        case 3:
            name="网球拍";
            money+=320*number;
            break;
        default:
            break;
        }
        System.out.println(name+"\t数量"+number+"\t合计"+money);
        System.out.print("是否继续(y / n):");
        A=input.next();
    }
    System.out.println("折扣:0.8");
    System.out.println("应付金额:"+money*0.8);
    System.out.print("应付金额:");
    int pay=input.nextInt();
    System.out.println("找钱:"+(pay-money*0.8));
    }
}