java 第五章 查询商品价格 关键代码

<span style="font-size:18px;"> Scanner input = new Scanner(System.in);
System.out.println("\tMyShooping管理系统>购物结算");
String name = "";
double price = 0.0;
int goodsNo = 0;
double discount=0.8;
String answer = "y";
int shu;
double shifu=0.0;
double zong=0.0;
System.out.println("******************************************\n");
System.out.println("请选择购买的商品编码:");
System.out.println("1.T恤\t2.网球鞋\t3.网球拍");
System.out.println("*******************************************\n");
while ("y".equals(answer)) {
System.out.println("请输入商品编号");
goodsNo = input.nextInt();
switch (goodsNo) {
case 1:
name = "T恤";
price = 245.0;
break;
case 2:
name = "网球拍";
price = 570.0;
break;
case 3:
name = "网球鞋";
price =320.0;
break;
}
System.out.println("请输入购买数量");
shu=input.nextInt();
System.out.println(name+"￥"+price+"\t"+shu+"\t合计"+(price*shu));
zong=price*shu;
System.out.println(price*shu);
System.out.println("是否继续执行(y/n)");
answer = input.next();

}
System.out.println("折扣:"+discount);
System.out.println("应付金额为:"+zong*discount);
System.out.println("实付金额为:");
shifu=input.nextDouble();
System.out.println("找钱:"+(shifu-zong*discount));
System.out.println("程序结束!");

</span>