1基础通过数组、选择结构、循环等实 现吃货联盟订餐系统。
1、我要订餐；
2、查看餐袋；
3、签收订单；
4、删除订单；
5、我要点赞；
6、退出系统；
public class Doy001 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String[] names = new String[4];
String[] dishMegs = new String[4];
int[] times = new int[4];
String[] addresses = new String[4];
int[] states = new int[4];
double[] sumPrices = new double[4];
names[0] = "wuli丫头";
dishMegs[0] = "汉堡2份";
times[0] = 12;
addresses[0] = "青年路";
sumPrices[0] = 76.0;
states[0] = 1;
// 第二条订单信息
names[1] = "wuli小仙女";
dishMegs[1] = "脆皮鸡2份";
times[1] = 18;
addresses[1] = "石佛营东里";
sumPrices[1] = 45.0;
states[1] = 0;
// 菜品信息
String[] dishNames = { "汉堡", "脆皮鸡", "柠檬水" };
double[] prices = new double[] { 38.0, 20.0, 10.0 };
int[] praiseNums = new int[3];
int num = -1;
boolean flag = false;
System.out.println("欢迎使用“吃货联盟订餐系统”");
// 进入循环
do {
// 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.print("请选择：");
int choose = input.nextInt();// 输入编号
switch (choose) {
case 1:
System.out.println("****我要订餐****");
boolean isAdd = false;
for (int i = 0; i < names.length; i++) {
if (names[i] == null) {
isAdd = true;
System.out.print("请输入订餐人姓名：");
String name = input.next();
// 菜品信息
System.out.println("序号" + "\t" + "菜名" + "\t" + "单价");
for (int j = 0; j < dishNames.length; j++) {
String price = prices[j] + "元";
String praiseNum = (praiseNums[j] > 0) ? praiseNums[j]
+ "赞"
: "0";
System.out.println((j + 1) + "\t" + dishNames[j]
+ " \t" + price);
}
// 点菜
System.out.print("请您选择要点的菜品编号：");
int chooseDish = input.nextInt();
System.out.print("请选择您需要的份数：");
int number = input.nextInt();
String dishMeg = dishNames[chooseDish - 1] + " "
+ number + "份";
double sumPrice = prices[chooseDish - 1] * number;
double deliCharge = (sumPrice >= 50) ? 0 : 5;// 满50免送餐费
System.out.print("请输入送餐时间(送餐时间是10点至20点间整点送餐)：");
int time = input.nextInt();
while (time < 10 || time > 20) {
System.out.print("您输入的时间有误，请输入10~20间的整数！");
time = input.nextInt();
}
// 订单信息
System.out.print("请输入送餐地址：");
String address = input.next();
System.out.println("订餐成功！");
System.out.println("您订的是：" + dishMeg);
System.out.println("送餐时间是：" + time + "点");
System.out.println("餐费" + sumPrice + "元,送餐费"
+ deliCharge + "元，总计："
+ (sumPrice + deliCharge) + "元");
names[i] = name;
dishMegs[i] = dishMeg;
times[i] = time;
addresses[i] = address;
sumPrices[i] = sumPrice + deliCharge;
break;
}
}
if (!isAdd) {
System.out.println("对不起，您的餐袋已满！");
}
break;
case 2:// 查看餐袋
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++) {
if (names[i] != null) {
String state = (states[i] == 0) ? "已预订" : "已完成";
String date = times[i] + "日";
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:// 签收订单
System.out.println("****签收订单****");
boolean isSignFind = false;// 找到要签收的订单
System.out.print("请选择要签收的订单序号：");
int choose1 = input.nextInt();
for (int i = 0; i < names.length; i++) {
if (names[i] != null && states[i] == 0 && choose1 == i + 1) {
states[i] = 1;
System.out.println("订单签收成功！");
isSignFind = true;
} else if (names[i] != null && states[i] == 1
&& choose1 == i + 1) {
System.out.println("您选择的订单已完成签收，不能再次签收！");
isSignFind = true;
}
}
if (!isSignFind) {
System.out.println("您选择的订单不存在！");
}
break;
case 4:// 删除订单
System.out.println("****签收订单****");
boolean isdelFind = false;// 是否删除找到的订单
System.out.print("请输入要删除的订单序号：");
int choose2 = input.nextInt();
for (int i = 0; i < names.length; i++) {
if (names[i] != null && states[i] == 1 && choose2 == i + 1) {
isdelFind = true;// 已找到订单
// 删除操作，删除后的元素依次后移
for (int j = choose2 - 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];
}
// 最后一位清空
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
&& choose2 == i + 1) {
System.out.println("您选择的订单未签收，不能删除！");
isdelFind = true;// 已找到订单
}
}
if (!isdelFind) {
System.out.println("您要删除的订单不存在！");
}
break;
case 5:// 我要点赞
System.out.println("****我要点赞****");
// 展示菜品信息
System.out.println("序号" + "\t" + "菜名" + "\t" + "单价");
for (int i = 0; i < dishNames.length; i++) {
String price = prices[i] + "元";
String praiseNum = (praiseNums[i] > 0) ? praiseNums[i]
+ "赞" : "0";
System.out.println((i + 1) + "\t" + dishNames[i] + "\t"
+ price + "\t" + praiseNum);
}
System.out.print("请选择您要点赞的菜品序号：");
int choose3 = input.nextInt();
praiseNums[choose3 - 1]++;
System.out.println("点赞成功！");
break;
case 6:// 退出系统
flag = true;
break;
default:
// 退出系统
flag = true;
break;
}
if (!flag) {
System.out.print("输入0返回！");
num = input.nextInt();
} else {
break;
}
} while (num == 0);
System.out.println("谢谢使用。欢迎下次光临！");
}
}