java实现简单的小超市程序
本文实例为大家分享了java实现小超市程序的具体代码，供大家参考，具体内容如下
一.人物包
1.顾客类
package person;
public class Customer {
public String name;
public double money;
public boolean isDrivingCar;
}
二.超市包
1.小超市类
package supermarket;
public class LittleSuperMarket {
public String superMarketName;
public String address;
public int parkingCount;
public double incomingSum;
public Merchandise[] merchandises;
public int[] merchandisesold;
}
2.商品类
package supermarket;
public class Merchandise {
public String name;
public String id;
public int count;
public double soldPrice;
public double purchasePrice;
}
三.主程序
import person.Customer;
import supermarket.LittleSuperMarket;
import supermarket.Merchandise;
import java.util.Scanner;
public class Run {
public static void main(String[] args) {
//通过小超市类创建超市实体
LittleSuperMarket littleSuperMarket = new LittleSuperMarket();
//为超市属性赋值
littleSuperMarket.address = "世纪大道999号";
littleSuperMarket.superMarketName = "我家超市";
littleSuperMarket.parkingCount = 200;
//为超市商品属性new一个大小为200的数组，类型为Merchandise
littleSuperMarket.merchandises = new Merchandise[200];
//创造下标相同的数组记录相同下标商品的卖出个数
littleSuperMarket.merchandisesold = new int[littleSuperMarket.merchandises.length];
//赋值
for (int i = 0; i < littleSuperMarket.merchandises.length; i++) {
//创建类型为merchandise的局部变量m，并为其赋值
Merchandise m = new Merchandise();
m.count = 200;
m.id = "ID" + i;
m.name = "商品" + i;
m.purchasePrice = 200 * Math.random();
m.soldPrice = (1 + Math.random()) * m.purchasePrice;
//将每次局部变量的值赋给对应下标的merchandise实体，此时实体merchandise有了值
littleSuperMarket.merchandises[i] = m;
}
System.out.println("超市开张了！! ！");
boolean open = true;
Scanner scanner = new Scanner(System.in);
while (open) {
System.out.println("本店叫做：" + littleSuperMarket.superMarketName);
System.out.println("本店地址：" + littleSuperMarket.address);
System.out.println("共拥有停车位：" + littleSuperMarket.parkingCount);
System.out.println("今天的营业额为：" + littleSuperMarket.incomingSum);
System.out.println("共有商品：" + littleSuperMarket.merchandises.length + "种");
//为顾客的属性赋值
Customer customer = new Customer();
customer.name = "编号：" + ((int) (Math.random() * 500));
customer.isDrivingCar = Math.random() > 0.4;
customer.money = (1 + Math.random()) * 10000;
//先判断顾客是否开车
if (customer.isDrivingCar) {
System.out.println("欢迎顾客" + customer.name + "号的顾客驾车而来！");
//顾客开车的条件下车位数>0，车位减一，否则重新进入循环（车位小于零，顾客无法停车）
if (littleSuperMarket.parkingCount > 0) {
littleSuperMarket.parkingCount--;
System.out.println("欢迎顾客" + customer.name + "号的顾客光临" + littleSuperMarket.superMarketName + ",车位剩余" + littleSuperMarket.parkingCount + "，钱包剩余" + customer.money);
} else {
System.out.println("对不起，停车位已满，欢迎下次光临");
continue;
}
//没开车，直接进入
} else {
System.out.println("欢迎顾客" + customer.name + "号的顾客光临" + littleSuperMarket.superMarketName + "钱包剩余" + customer.money);
}
//在购买流程外部创建变量统计总共花费和购买数量
double totalCast = 0;
int numToBuy;
//购买循环
while (true) {
System.out.println("本店提供" + littleSuperMarket.merchandises.length + "种商品，欢迎选购。请输入商品编号:");
int InDex = scanner.nextInt();
//对商品索引的合法性进行检测
if (InDex <= 0) {
break;
}
if (InDex > littleSuperMarket.merchandises.length - 1) {
System.out.println("对不起，本店没有那么多商品。请输入0到" + (littleSuperMarket.merchandises.length - 1) + "之间的数字");
continue;
}
System.out.println("您选购的商品的名字是:" + littleSuperMarket.merchandises[InDex].name + "\t售价为：" + littleSuperMarket.merchandises[InDex].soldPrice);
System.out.println("请问你要买几个？");
numToBuy = scanner.nextInt();
//对购买数量的合法性进行检测
if (numToBuy <= 0) {
System.out.println("不买看看也好，欢迎继续选购");
continue;
}
if (numToBuy > littleSuperMarket.merchandises[InDex].count) {
System.out.println("本店没有那么多商品，欢迎继续挑选");
continue;
}
/*其实这里的逻辑不太好，但是懒得改了，等再学习一段时间再好好完善这个小程序。这里把花费放在购买循环外面才是比较好的逻辑，然后在这里用if循环判断购买的一系列合法性即可。
或者把售卖个数的属性也在这里改变赋值会容易懂，我这里放到后面了，懒得改了。等下次优化功能时再整体优化逻辑
*/
//输入合法，求总共花费，并对商品库存进行相应的扣除
totalCast += littleSuperMarket.merchandises[InDex].soldPrice * numToBuy;
littleSuperMarket.merchandises[InDex].count -= numToBuy;
//仍然属于合法性检测，检测顾客的钱是否够支付他所购买商品的总价
if (customer.money < totalCast) {
System.out.println("对不起，您身上的钱不足以支付您的商品，欢迎下次选购");
//钱不足以支付，对应商品的数量再把刚才购买但未成功支付的商品数量归还
//就像你在超市里买东西，放进购物车了，货架上超市库存少了，其他顾客拿不到了，等你支付时钱不够，商品被放回，其他顾客可以拿到的数量增加，即商品库存增加
littleSuperMarket.merchandises[InDex].count += numToBuy;
//这一段当时写的时候我也比较乱
//因为总价计算在外面了，此时总价已将超出了你的钱数循环从这里出去如果总价不置零，你的钱数一直小于总价，该顾客一直无法购买商品
totalCast = 0;
} else {
//正确购买，售出数量对应增加，顾客口袋里的钱对应减少
littleSuperMarket.merchandisesold[InDex] += numToBuy;
customer.money -= totalCast;
//开车来的话，顾客离开，车位释放
if (customer.isDrivingCar) {
littleSuperMarket.parkingCount++;
}
}
}
littleSuperMarket.incomingSum += totalCast;
//每次循环结束，该人总钱数得出将该人的totalCast累加到littleSuperMarket.incomingSum中，得出总共收入
//littleSuperMarket.incomingSum和totalIncoming数值相等，基本为同一意思
//littleSuperMarket.incomingSum += totalCast;
System.out.println("顾客" + customer.name + "号的顾客共消费" + totalCast + "，还剩余" + customer.money);
System.out.println("今天还要继续营业吗？");
open = scanner.nextBoolean();
}
System.out.println("超市关门了！");
System.out.println("今天总的营业额为" + littleSuperMarket.incomingSum + "营业情况如下：");
//定义总收入和总净利润
double totalNetIncoming = 0;
double totalIncoming = 0;
for (int i = 0; i < littleSuperMarket.merchandisesold.length; i++) {
//只统计售出数量大于0的商品
if (littleSuperMarket.merchandisesold[i] > 0) {
//计算总利润和总净利润，通过累加求得
double incoming = littleSuperMarket.merchandises[i].soldPrice * littleSuperMarket.merchandisesold[i];
double netIncoming = (littleSuperMarket.merchandises[i].soldPrice - littleSuperMarket.merchandises[i].purchasePrice) * littleSuperMarket.merchandisesold[i];
totalIncoming += incoming;
totalNetIncoming += netIncoming;
System.out.println(littleSuperMarket.merchandises[i].name + "售出了" + littleSuperMarket.merchandisesold[i] + "个。销售额为" + incoming + ",净利润为" + netIncoming);
}
}
System.out.println("今日总销售额为：" + totalIncoming + ";今日总净利润为：" + totalNetIncoming);
}
}
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