shape.h

// File: shape.h
// Purpose: Class prototype for our generic shape & a helper function.

#ifndef SHAPE_H
#define SHAPE_H
class shape {
public:
  virtual void draw()=0;
  virtual void getUserParameters(int firstLine)=0;
};

// Helper function, which allows a user to create a shape.
// If the user decides, instead, to quit, it returns NULL
shape *getUserShape();

#endif