Help please: Runtime error... I can't solve

Code:

#include <iostream>
#include <string>
#include <cmath>
#include <conio.h>
#include <cstdlib>


using namespace std;


class animal_game{
    public:
            string name(){};
            int leg (){};
};

//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
class bird : public animal_game{
     public:
            string name ()
             {return (" Bird ");}

            int leg ()
             {return (2);}
           };
//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
class fish : public animal_game{
     public:
            string name ()
             {return (" Fish ");}

            int leg ()
             {return (0);}
           };
//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
class insect:public animal_game{
     public:
            string name ()
             {return (" Insect ");}

            int leg ()
             {return (6);}
           };
//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
class play {
    private:
     int pl1,pl2,no,luck;

    public:
           animal_game *ani;

           play ()
           { srand (time(NULL));
             pl1=0;
             pl2=0;
           }

           void find_luck()
            {
                luck=rand()%10;
                }

           void find (){

             no=rand()%3;

             if (no==0)
                 ani=new fish();
             else if (no==1)
                 ani=new bird();
             else
                 ani=new insect();
                            }



            int score()
             {return(luck * ani->leg());}


            void main_game_play()
             {
                int hlp1,hlp2;
                cout << endl <<" Player 1: Press ENTER to obtain an animal."<< endl ;
                find_luck();
                find();
                hlp1=score();
                getch();


                cout << endl << " Player1 obtained 1  " << ani->name()
                     << " with lucky number  " << luck << ". Total legs = "
                     << score() << endl;
                     pl1 = score()+pl1;



                cout << endl <<" Player 2: Press ENTER to obtain an animal." <<endl;
                find_luck();
                find();
                hlp2=score();
                getch();

                cout << endl << " Player 2 obtained 1  " << ani->name()
                     << " with lucky number  " << luck << ". Total legs = "
                     << score() << endl;
                     pl2 = score()+pl2;



                if (hlp1 > hlp2)
                 {
                  cout << endl <<" Player 1 WIN!" << endl;
                  cout << " Total score (leg count): " <<endl;
                  cout << " Player 1 Score is: " << pl1 << endl
                       << " Player 2 Score is: " << pl2 << endl;
                 }

                else if (hlp1<hlp2)
                 {
                  cout << endl <<" Player 2 WIN!" << endl;
                  cout << " Total score (leg count): " <<endl;
                  cout << " Player 1 Score is: " << pl1 << endl
                       << " Player 2 Score is: " << pl2 << endl;
                 }

                else if (hlp1 == hlp2)
                 {
                  cout << endl << " DRAW!!!" << endl;
                  cout << " Total score (leg count): " <<endl;
                  cout << " Player 1 Score is: " << pl1 << endl
                       << " Player 2 Score is: " << pl2 << endl;
                 }

             }

     ~play(){
        if (pl1 == pl2)
            cout << "Draw!\n";
        else if (pl1 > pl2)
            cout << "Winner: Player1. Congrats!\n";
        else
            cout << "Winner: Player2. Congrats!\n";

        cout << endl;
        delete ani;
        ani = NULL;
        system("pause");
     }


};
//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
int main ()
{
    play *ply;
    int r,i;
    char ans;

    do{
        cout << " How many rounds you want to play -> ";
        cin >> r;

        for (i=1;i<=r;i++)
         {cout << "Round #" << i << endl;
          ply->main_game_play();}

        cout << " Do you want to continue (Please enter Y (Yes) or N (No)) ->  ";
        cin >> ans;

      }while(ans== 'Y' || ans == 'y');

      return 0;
}

I checked many times (scanning the codes and by using cout to test the output) but I cannot find the error.

Please help.

 

Why then, do you think that your code has any error at all ?

Why don't u explain your problem ?
Just posting a "Help me ..." won't fetch you any help.

 

Do you have a image of the origional script. Double check to see if the file is correct in all catogories one wrong thing or one wrong letter will give you that message. I found myself when making scprits that somethimes on the orgional it has a sppace at the top that i dont relize and that usualy fix's it for me. But thats all the info i can give based on the info you provided. Try telling us what system your using what type of file did you put it in that stuff.

 

Cause it could not compile previously so I had no idea where I went wrong.

But it's solved. I didn't set my variables in the base class to abstract (well, this I tried before but I got errors... someone else managed to do it correctly for me) and forgot to create an object for the pointer *ply <--this is my biggest mistake.

But thank you for replying. I appreciate any help since I am still a beginner at this.