XIAO XUESHENG SHUXUECESHI

#include <iostream>
#include <stdlib.h>
#include <time.h>
using namespace std;
int main(void)
{enum ti {jia,jian,cheng};
int i,j,a,b,c,num=0,ge,ans;
cout<<"xuanzhe ti and geshu:"<<endl;
cin>>j>>ge;
for(i=0;i<ge;i++)
{a=rand();
b=rand();
cout<<a<<"and"<<b<<endl;
if(j==jia)
{c=a+b;
cout<<"answer is:";
cin>>ans;
if(ans==c)
num++;
else cout<<c<<endl;
}
if(j==jian)
{c=a-b;
cout<<"answer is:";
cin>>ans;
if(ans==c)
num++;
else cout<<c<<endl;
}
if(j==cheng)
{c=a*b;
cout<<"answer is:";
cin>>ans;
if(ans==c)
num++;
else cout<<c<<endl;
}
}
cout<<num;
system("pause");
}