• 结对编程--四则运算


    结对编程对象:张忠玉

     1 package com.jkxy.yxj.arithmetic;
     2 
     3 public class Arithmetic {
     4     //产生分数
     5     String fraction() {
     6         int i = (int) (Math.random() * 10);
     7         int j ;
     8          do{
     9             j = (int) (Math.random() * 10);
    10             }while (j == 0);//分母不能为0                
    11         return (i + "/" + j);
    12     }
    13 
    14     public static void main(String[] args) {
    15         String fa, fb;//记录两个分数
    16         int k;//确定两个数的构成,为两个都是分数,一个分数一个整数,两个都是整数
    17         Arithmetic math = new Arithmetic();
    18         for (int n = 0; n < 100; n++) {
    19             fa = math.fraction();//产生两个分数
    20             fb = math.fraction();
    21             int i = (int) (Math.random() * 100);
    22             int j = (int) (Math.random() * 100);
    23             //随机产生0,1,2,3,分别代表加减乘除
    24             switch ((int) (Math.random() * 4)) {
    25             case 0:
    26                 k = (int) (Math.random() * 3);
    27                 if (k == 0)
    28                     System.out.println(i + "+" + j + "=");
    29                 else if (k == 1)
    30                     System.out.println(fa + "+" + j + "=");
    31                 else if (k == 2)
    32                     System.out.println(fb + "+" + fa + "=");
    33                 break;
    34             case 1:
    35                 k = (int) (Math.random() * 3);
    36                 //小学生没有学过负数,所以在进行减法时,假如出现被减数大于减数,则将两数交换,再进行减法;
    37                 if (i < j) {
    38                     int temp = i;
    39                     i = j;
    40                     j = temp;
    41                 }
    42                 if (k == 0)
    43                     System.out.println(i + "-" + j + "=");
    44                 else if (k == 1)
    45                     System.out.println(j + "-" + fa + "=");
    46                 else if (k == 2)
    47                     System.out.println(fb + "-" + fa + "=");
    48                 break;
    49             case 2:
    50                 k = (int) (Math.random() * 3);
    51                 if (k == 0)
    52                     System.out.println(i + "*" + j + "=");
    53                 else if (k == 1)
    54                     System.out.println(fa + "*" + j + "=");
    55                 else if (k == 2)
    56                     System.out.println(fb + "*" + fa + "=");
    57                 break;
    58             case 3:
    59                 while (j == 0)//除数不能为0,假如除数为0,则再产生一个随机数
    60                     j = (int) (Math.random() * 100);
    61                 k = (int) (Math.random() * 3);
    62                 if (k == 0)
    63                     System.out.println(i + "/" + j + "=");
    64                 else if (k == 1)
    65                     System.out.println(fa + "/" + j + "=");
    66                 else if (k == 2)
    67                     System.out.println(fb + "/" + fa + "=");
    68                 break;
    69             }
    70         }
    71     }
    72 }

    总结:

    通过这次项目的实践,我深切体会到结对编程带来的好处,通过讨论以后发现,一起思考容易让问题得到更加全面的解决,而且相互激励能将问题解决的更快。这样的训练不仅可以提高我们与同学的沟通能力,而且能发现一些新的思维方式。

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  • 原文地址:https://www.cnblogs.com/yxj63/p/5376335.html
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