Subj : Re: Need help, please!
To   : borland.public.cpp.borlandcpp
From : "Ed Mulroy [TeamB]" <dont_email_me@bitbuc.ket>
Date : Tue Nov 25 2003 07:13 pm

Here is the friend function taking two classes as arguments.  Yes, it was
slow to come about.  It was a bit delayed by phone calls.

---------------------------
C:\Lookat\q421
>type q421b.cpp
class ClassA
{
private:
    int iMember;

public:
    ClassA(int i = 0) : iMember(i) {}

    int  Value() const { return iMember; }
    void Value(int i) { iMember = i; }

    // Member function removed so that this
    // does not duplicate an existing function

    friend ClassA operator - (const ClassA& Obj1, const ClassA& Obj2);
};


ClassA operator - (const ClassA& obj1, const ClassA& obj2)
{
    ClassA tmp(obj1.iMember - obj2.iMember);

    return tmp;
}

#include <iostream>

using namespace std;

int main()
  {
  ClassA obj1(5);
  ClassA obj2(3);
  ClassA result = obj1 - obj2; // uses friend function

  cout << "obj1.Value() = " << obj1.Value() << endl;
  cout << "obj2.Value() = " << obj2.Value() << endl;
  cout << "obj1.Value() - obj2.Value() using friend = "
       << result.Value() << endl;
  return 0;
  }


C:\Lookat\q421
>bcc32 -WCR q421b
Borland C++ 5.6.4 for Win32 Copyright (c) 1993, 2002 Borland
Q421B.CPP:
Turbo Incremental Link 5.64 Copyright (c) 1997-2002 Borland

C:\Lookat\q421
>q421b
obj1.Value() = 5
obj2.Value() = 3
obj1.Value() - obj2.Value() using friend = 2

C:\Lookat\q421
>
---------------------------

..  Ed

> Bojidar Markov wrote in message
> news:3fc3d0e3@newsgroups.borland.com...

.