java基础第五天小练习（商品库存管理）

 1 import java.util.Scanner;
 2 
 3 public class TestOne {
 4         public static void main(String[] args) {
 5             //定义5个数组
 6             String [] brand  = {"MacBookAir","ThinkPadT450"};
 7             double [] size = {13.3,15.6};
 8             double [] price = {9999.99,6666.66};
 9             int [] count = {0,0};
10             while(true) {
11             int choose = chooseFunction();
12             switch (choose) {
13             case 1:
14                 show(brand, size, price, count);
15                 break;
16             case 2:
17                 change(brand, count);
18                 break;
19             case 3:
20                 return;        
21             default:
22                 System.out.println("输入有误没有这个功能");
23                 break;
24             }
25             }
26             
27         }
28     //实现用户的选择功能，把功能的需要返回
29     public static int chooseFunction() {
30         System.out.println(">>>>>>欢迎登陆库存管理系统6.b");
31         System.out.println("1.查看商品库存清单");
32         System.out.println("2.修改商品库存数量");
33         System.out.println("3.退出");
34         System.out.println("请输入要执行的操作序号：");
35         //接受用户键盘输入
36         Scanner sc = new Scanner(System.in);
37         int chooseNumber = sc.nextInt();
38         return chooseNumber;
39     }
40     //展示所有库存清单
41     public static void show(String[] brand,double [] size,double [] price,int [] count) {
42         System.out.println("---------商品库存清单---------");
43         System.out.println("品牌型号     尺寸     价格    库存数");
44         //定义变量，计算总库存，和总价格
45         int totalCount = 0;
46         int totalMoney = 0;
47         for(int i = 0;i<brand.length;i++) {
48             System.out.println(brand[i]+"  "+size[i]+"   "+price[i]+"  "+count[i]);
49             totalCount += count[i];
50             totalMoney += count[i]*price[i];
51         }
52         System.out.println("总库存数：" + totalCount);
53         System.out.println("商品总金额：" + totalMoney);
54     }
55     //修改所有商品的库存数量
56     public static void change(String[] brand,int [] count) {
57         System.out.println("");
58         Scanner sc = new Scanner(System.in);
59         for(int i = 0;i<brand.length;i++) {
60             System.out.println("请输入"+brand[i]+"库存数");
61             int userCount = sc.nextInt();
62             count[i] = userCount;        
63         }        
64     }
65 }