/*
   Copyright(C) 2008
   All Rights Reserved. Salih Yurttas, Computer Science, TAMU.

   Permission to use, copy, modify, and distribute this
   software and its documentation for EDUCATIONAL purposes
   and without fee is hereby granted provided that this
   copyright notice appears in all copies.
 
   date   : January 1, 2008.
   author : Salih Yurttas.

   A.h
*/


#ifndef A_H
#define A_H

#include <iostream>

using namespace std;

class A {
public:
  A(const int s=0,         // common size for the a1 and a2
    const int a=0,         // initial values for a1
    const int b=0);        // initial values for a2

  A(const A&);

  ~A();

  A& operator=(const A&);

  int get_size() const;

  int* get_a1() const;
  void set_a1(const int);  // every position assigned identical value

  int* get_a2() const;
  void set_a2(const int);  // every position assigned identical value

  void set_a(const int,    // new size
             const int,    // a1 is assigned with identical int
             const int);   // a2 is assigned with identical int

  void set_a(const int,    // new size
             const int*,   // a1 is assigned with new int*
             const int*);  // a2 is assigned with new int*

  A& operator+=(const A&);

  A& operator-=(const A&);

  friend A operator+(const A&,
                     const A&);

  friend A operator-(const A&,
                     const A&);

  friend bool operator==(const A&,
                         const A&);

  friend bool operator!=(const A&,
                         const A&);

  friend ostream& operator<<(ostream&,
                             const A&);

private:
  int size;                // common size for a1 and a2

  int* a1;
  int* a2;
};
#endif