结对编程（二）

 1 package wpy.test;
 2 
 3 import java.util.Scanner;
 4 
 5 public class test {
 6     private static Scanner in = new Scanner(System.in);
 7     private static final int RANGE_LOW = 0;// 允许用户输入的最小值
 8     private static final int RANGE_HIGH = 100;// 允许用户输入的最大值
 9     private static final int LIMIT = 10;
10     private static int result;// 返回结果
11 
12 
13     public static int getUserInput() {
14         int number = -1;
15         System.out.println("请输出0~100的整数！");
16         while (true) {
17             if (in.hasNextInt()) {
18                 number = in.nextInt();
19                 if (number > RANGE_HIGH || number < RANGE_LOW) {
20                     System.err.println("输入不在1~100！");
21                 } else {
22                     break;
23                 }
24             } else {
25                 in.nextLine();
26                 System.out.println("请输入整数！");
27             }
28         }
29         return number;
30     }
31 
32 
33     public static int getResult(int num1, int num2) {
34         if (num1 < num2) {
35             return num1 + num2;
36         }
37         return num1 + num2;
38     }
39 
40     public static void main(String[] args) {
41         int op1 = getUserInput();
42         int op2 = getUserInput();
43         System.out.println("******************************************************");
44         System.out.println("第一次输入 " + op1 + "      第二次输入 " + op2);
45         if (op1 < LIMIT && op2 < LIMIT) {
46             System.out.println("输入都小于 10!!!");
47             return;
48         }
49         result = getResult(op1, op2);
50         if (result > 0) {
51             if (result > 100) {
52                 System.out.println("Illegal!");
53             } else {
54                 System.out.println("和为 " + result);
55             }
56         } else {
57             if (result < -50) {
58                 System.out.println("Illegal!");
59             } else {
60                 System.out.println("差为 " + result);
61             }
62         }
63     }
64 
65 }