第二次作业：可以定制题数，支持真分数

#include<iostream>
using namespace std;
void main()
{
    int fenshuRand;
    int numRand1,numRand2; 
    int fuhaoRand; 
    int count; 
    for(count=0;count<30;count++)
    {
        cout<<"\t("<<count+1<<")\t";
        fenshuRand=rand()%2+1;
        if(fenshuRand==1)
        {
        numRand1=rand()%100+1;
        cout<<numRand1;
        }
        if(fenshuRand==2)
        {
        numRand1=rand()%100+1;
        numRand2=rand()%100+1;
        if(numRand1<numRand2)
            cout<<"("<<numRand1<<"/"<<numRand2<<")";
        else
            cout<<"("<<numRand2<<"/"<<numRand1<<")";
        }
        fuhaoRand=rand()%4+1;
        if(fuhaoRand==1)
            cout<<" ＋ ";
        else if(fuhaoRand==2)
            cout<<" － ";
        else if(fuhaoRand==3)
            cout<<" × ";
        else
            cout<<" ÷ ";

        fenshuRand=rand()%2+1;
        if(fenshuRand==1)
        {
            numRand1=rand()%100+1;
            cout<<numRand1;
        }
        if(fenshuRand==2)
　　  {
           numRand1=rand()%100+1;
　　     numRand2=rand()%100+1;
           if(numRand1<numRand2)
                cout<<"("<<numRand1<<"/"<<numRand2<<")";
           else
                cout<<"("<<numRand2<<"/"<<numRand1<<")";

         }
    cout<<"="<<endl;
    }
}