标签：exti 变量 string public states int() 显示 地址 bre
import java.util.Scanner;
public class VersionAlliance {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String[] names = new String[4]; // 保存订餐人姓名
String[] dishMegs = new String[4]; // 保存菜名和分数的所选信息
String[] addresses = new String[4]; // 保存送餐地址
int[] times = new int[4]; // 保存送餐时间
int[] states = new int[4]; // 保存订单状态
double[] sumPrices = new double[4]; // 保存订单总金额 数组长度可以随便改，但长度要都保持一致！
String[] dishNames = { "红烧带鱼", "鱼香肉丝", "时令蔬菜" };
double[] prices = { 38.0, 20.0, 10.0 };
int[] praiseNums = new int[3];
// 初始化订单信息1
names[0] = "张晴";
dishMegs[0] = "红烧带鱼2份";
times[0] = 12;
addresses[0] = "天成路207号";
sumPrices[0] = 76.0;
states[0] = 1;
// 初始化订单信息2
names[1] = "张晴";
dishMegs[1] = "鱼香肉丝2份";
times[1] = 18;
addresses[1] = "天成路207号";
sumPrices[1] = 45.0;
states[1] = 0;
System.out.println("欢迎使用“吃货联盟订餐系统”");
int num;// num 作等值判断1234560
do {
// 显示菜单
System.out.println("*****************************");
System.out.println("1、我要订餐");
System.out.println("2、查看餐袋");
System.out.println("3、签收订单");
System.out.println("4、删除订单");
System.out.println("5、我要点赞");
System.out.println("6、退出系统");
System.out.println("*****************************");
System.out.println("请选择");
num = input.nextInt();
// 上面实现菜单切换
switch (num) {
case 1: {
System.out.println("***我要订餐***");
boolean flag = false;// 记录是否可以订餐
for (int j = 0; j < names.length; j++) {
if (names[j] == null) {
flag = true;
System.out.println("请输入订餐人姓名：");
String name = input.next();
// 菜单
System.out.println("序号\t菜名\t单价\t点赞数");
for (int i = 0; i < dishNames.length; i++) {
String praiseNum = (praiseNums[i] > 0 ? praiseNums[i] + "赞" : "0");
System.out.println((i + 1) + "\t" + dishNames[i] + "\t" + prices[i] + "\t" + praiseNum);
}
// 开始点菜
System.out.println("请选择您要点的菜品编号：");
int chooseDish = input.nextInt();
System.out.println("请选择您需要的份数：");
int number = input.nextInt();
String dishMeg = dishNames[chooseDish - 1] + "" + number + "份";
// 送餐时间
int time = 0;
do {
System.out.println("请输入送餐时间（送餐时间是10点至20点间整点送餐）：");
time = input.nextInt();
} while (time < 10 || time > 20);
// 送餐地址
System.out.println("请输入送餐地址：");// 海定区成府路207号
String add = input.next();
// 计算总价 单价乘以份数
double sumPrice = prices[chooseDish - 1] * number;
// 计算消费 三目运算
double tip = (sumPrice >= 50 ? 0 : 5);
// 打印输出结果
System.out.println("订餐成功！");
System.out.println("您订的是：" + dishMeg);
System.out.println("送餐时间：" + time + "点");
System.out.println("餐费：" + sumPrice + "元，送餐费:" + tip + "元，总计：" + (sumPrice + tip) + "元。");
// 将订单信息保存在数组中
names[j] = name;
dishMegs[j] = dishMeg;
times[j] = time;
addresses[j] = add;
sumPrices[j] = sumPrice + tip;
break;
}
}
if (!flag) {
System.out.println("对不起，您的餐袋已满！");
}
break;
}
case 2: {
System.out.println("***查看餐袋***");
System.out.println("序号\t订餐人\t餐品信息\t\t送餐日期\t送餐地址\t\t总金额\t订单状态");
for (int i = 0; i < names.length; i++) {
// 做判断 数组元素没有赋值 为null则不显示
if (names[i] != null) {
// states[0] states[1]前面已经初始化了 0就是预定，1就是完成
String state = (states[i] == 0) ? "已预订" : "已完成";
// 声明数组 只是为了方便书写 不声明也行
String date = times[i] + "点";
String sumPrice = sumPrices[i] + "元";
System.out.println((i + 1) + "\t" + names[i] + "\t" + dishMegs[i] + "\t" + date + "\t"
+ addresses[i] + "\t" + sumPrice + "\t" + state);
}
}
break;
}
case 3: {
System.out.println("***签收订单***");
boolean flag1 = false;
System.out.println("请选择要签收的订单序号：");
// 自定义一个要签收单号的变量
int signOrderId = input.nextInt();
// 遍历数组
for (int i = 0; i < names.length; i++) {
// 判断是否可以签收订单 订单是否完成 订单号是否存在
if (names[i] != null && states[i] == 0 && signOrderId == i + 1) {
states[i] = 1;
System.out.println("订单签收成功！");
flag1 = true;
} else if (names[i] != null && states[i] == 1 && signOrderId == i + 1) {
System.out.println("您选择的订单已完成签收，不能再次签收！");
flag1 = true;
}
}
if (!flag1) {
System.out.println("您选择的订单不存在！");
}
break;
}
case 4: {
System.out.println("***删除订单***");
// 立flag2判断订单是否存在
boolean flag2 = false;
System.out.println("请输入要删除的订单序号：");
int delId = input.nextInt();
for (int i = 0; i < names.length; i++) {
// 存在 遍历数组查找订单号 判断是否可以删除 没有签收的订单不可以删除
if (names[i] != null && states[i] == 1 && delId == i + 1) {
flag2 = true;
// 找到了 订单号 查找他在数组中的什么位置，数组从0开始，所以-1 ；然后所有元素前移一位
for (int j = delId - 1; j < names.length - 1; j++) {
names[j] = names[j + 1];
dishMegs[j] = dishMegs[j + 1];
times[j] = times[j + 1];
addresses[j] = addresses[j + 1];
states[j] = states[j + 1];
sumPrices[j] = sumPrices[j + 1];
}
// 最后一位数据清空 否则还会存在
int endIndex = names.length - 1;
names[endIndex] = null;
dishMegs[endIndex] = null;
times[endIndex] = 0;
addresses[endIndex] = null;
states[endIndex] = 0;
sumPrices[endIndex] = 0;
System.out.println("删除订单成功！");
break;
} else if (names[i] != null && states[i] == 0 && delId == i + 1) {
System.out.println("您选择的订单未签收，不能删除！");
flag2 = true;
break;
}
}
if (!flag2) {
System.out.println("您要删除的订单不存在！");
}
break;
}
case 5: {
System.out.println("***我要点赞***");
// 显示菜品信息，和前面case1一模一样
System.out.println("序号\t菜名+\t单价\t点赞数");
for (int i = 0; i < dishNames.length; i++) {
String price = prices[i] + "元";
//
String priaiseNum = (praiseNums[i]) > 0 ? praiseNums[i] + "赞" : "0";
System.out.println((i + 1) + "\t" + dishNames[i] + "\t" + price + "\t" + priaiseNum);
}
System.out.print("请选择您要点赞的菜品序号:");
int zanId = input.nextInt();
praiseNums[zanId - 1]++;
System.out.println("点赞成功！");
break;
}
case 6: {
System.out.println("谢谢使用，欢迎下次光临");
break;
}
default: {
System.out.println("***输入错误***");
break;
}
}
System.out.println("输入0返回主菜单：");
num = input.nextInt();
} while (num == 0);// 循环打印菜单
System.out.println("退出系统！");
}
}
标签：exti 变量 string public states int() 显示 地址 bre
原文地址：http://www.cnblogs.com/lanseyitai1224/p/6800635.html
