books shops project

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;


class books
{
    char aname[20];
    char tname[20];
    char *author[4];
    char *title[4];
    char *price[4];
    char *publisher[4];
    char *stock[4];
    char ch;
    public :
    void showlist();
    void order();
};
void books::showlist()
{
    int i;
    char *author[4]={"kazinazrul","rabindranath","promothchow.","sufiakamal"};
    char *title[4]={"bindhasagor","seserkabita","biserbina","chototori"};
    char *price[4]={"100","200","300","400"};
    char *publisher[4]={"mina","raju","kabir","rahim"};
    char *stock[4]={"5","10","15","20"};
    cout<<endl<<endl<<endl<<'\t'<<"Author"<<'\t'<<'\t'<<"Title"<<'\t'<<'\t'<<"Price"<<'\t'<<"Publisher"<<'\t'<<"Stock"<<endl;
    cout<<'\t'<<"--------------------------------------------------------------"<<endl<<endl;
    for(i=0;i<4;i++)
    {
       cout<<'\t'<<author[i]<<'\t'<<title[i]<<'\t'<<price[i]<<'\t'<<publisher[i]<<'\t'<<'\t'<<stock[i]<<endl<<endl;
    }
}
void books::order()
{
    books ob;
    int i;

   cout<<endl<<endl<<"Are you sure want to order our books(y/n) ?";
   cin>>ch;
   if(ch=='Y' || ch=='y')
   {
       cout<<"Thank you very much to choice our products."<<endl;
       cout<<endl<<"Pls enter your Books Author name : "<<endl;
       cin>>ob.aname;
       cout<<endl<<"And Then enter your Books Title name : "<<endl;
       cin>>ob.tname;
       for(i=0;i<4;i++)
       {

           if((strcmp(ob.aname,ob.author[i])==0) && (strcmp(ob.tname,ob.title[i])==0) )
           {
                   cout<<endl<<"This Books are available in ours Shops."<<endl;

           }

       }
    
   }
}

int main()
{
    books o;
    while(true)
    {
        int index;
        cout<<endl<<endl<<"What do you want : "<<endl;
        cout<<"1 for see booklist"<<endl<<"2 for Order"<<endl;
        cout<<"3 for Exit the program"<<endl;
        cin>>index;
        switch(index)
        {
            case 1:
            o.showlist();
            break;

            case 2:
            o.order();
            break;

            default :
            cout<<endl<<endl<<"Many many thanks to perform this operation"<<endl<<endl;
            return 0;

        }

    }


}