代码及设计思路

 1 #include<iostream>
 2 #include<cmath>
 3 #include<cstdlib>
 4 using namespace std;
 5 
 6 void main()
 7 {
 8     int a[30], b[30];
 9     char c[4];
10     int d;
11     int e[30], f[30], z;
12     c[0] = ‘+‘;
13     c[1] = ‘-‘;
14     c[2] = ‘*‘;
15     c[3] = ‘/‘;
16     d = 0;
17     for (int i = 0; i < 30; i++)
18     {
19         a[i] = rand() % 10;
20         b[i] = rand() % 10;
21         e[i] = rand() % 10;
22         f[i] = rand() % 10;
23         z = rand() % 2;
24         if (z == 0)                        //判断是否是分数；0为真分数，1为整数
25         {
26             if (a[i] < b[i])                //真分数的编程循环
27             {
28                 if (e[i] < f[i])
29                 {
30                     d = rand() % 4;
31                     cout << "第"<<i<<"题:" << a[i] << "/" << b[i] << c[d] << e[i] << "/" << f[i] << "="<<end
32                 }
33                 else
34                     i = i - 1;
35             
36             }
37             else
38                 i = i - 1;
39         }
40         else                            //整数的编程
41             cout <<  "第"<<i<<"题:" << a[i] << c[d] << e[i] << "="<<endl;
42     }
43     system("pause");
44 }