随机生成三十个二年级的加减乘除法的题目代码

 1 #include<iostream>
 2 #include<stdlib.h>
 3 #include"time.h"
 4 using namespace std;
 5 void main()
 6 {
 7     int a, b, i, j, k;
 8     for (i = 0; i < 30; i++)
 9     {
10         a = rand() % 10;
11         b = rand() % 10;
12         if (a < b)
13         {
14             k = a;
15             a = b;
16             b = k;
17         }
18         cout << a;
19         j = rand() % 4;
20         switch (j)
21         {
22         case 0:cout << ‘+‘; break;
23         case 1:cout << ‘- ‘; break;
24         case 2:cout << ‘*‘; break;
25         case 3:cout << ‘/‘; break;
26 
27         }
28 
29         if (j % 4 == 3)
30             b++;
31         cout << b << "=" << endl;
32     }
33 }