30道四则运算题的第一次升级

 1 /**
 2 作者：程鹏远
 3 题目：30道2年纪四则运算题目
 4 */
 5 #include <iostream.h>
 6 #include <stdlib.h>
 7 int main()
 8 {
 9     int a,b,c;
10     for(int i=0;i<30;i++)
11     {
12         cout<<"第"<<i+1<<"题： ";
13         a=rand()%100;//x+rand()%(y-x+1)随机生成【x，y】内的整数
14         b=rand()%100;
15         c=rand()%4;
16         switch (c)
17         {
18         case 1:
19             cout<<a<<"+"<<b<<"="<<endl;
20             break;
21         case 2:
22             if(a>b){cout<<a<<"-"<<b<<"="<<endl;}
23             else{cout<<b<<"-"<<a<<"="<<endl;}
24             break;
25         case 3:            
26             cout<<a<<"*"<<b<<"="<<endl;
27             break;
28         case 0:    
29             
30             int j=0;
31             while((j<100000)&&(a!=0)&&(b!=0)&&(a%b==0)){cout<<a<<"/"<<b<<"="<<endl;i++;j++;}
32         
33             if((a!=0)&&(b!=0)&&(a%b==0)){cout<<a<<"/"<<b<<"="<<endl;i++;}
34             else{
35                 int j=0;
36                 while(j<100000)
37                 {
38                     a=rand()%1000;//x+rand()%(y-x+1)随机生成【x，y】内的整数
39                     b=rand()%100;
40                     if((a!=0)&&(b!=0)&&(a%b==0)){cout<<a<<"/"<<b<<"="<<endl;i++;j=100000;j++;}
41                     else{j++;}
42                 }
43             }
44         
45             break;    
46         }    
47     }
48     return 0;
49 }