Java基础之模拟购物系统案例

//导入Scanner模块
import java.util.Scanner;
public class Test01{
public static void main(String[] args){

//创建Scanner类的对象
Scanner scan = new Scanner(System.in);

System.out.println("请输入您购买商品的单价：（￥）");
double price = scan.nextDouble();

System.out.println("请输入您购买商品的数量：");
int amount = scan.nextInt();

double totalPrice = price * amount;
System.out.println("您总共消费的金额为："+totalPrice+"元");

System.out.println("请输入您支付的金额：");
double money = scan.nextDouble();

//4.关闭Scanner对象
scan.close();

double change = 0; //初始化
if(money>=totalPrice){
change = money - totalPrice;

System.out.println("您总共消费："+totalPrice+"支付："+money+"找您："+change);
}else{
System.out.println("您输入的钱数不够，请重新输入...");
}
}
}