CPP/Classes/FriendClass

FriendClass.cpp

#include <iostream>
 
//forward declaration    
class B;
 
class A
{
  private:
    friend class B;
    int a;
 
  public:
    A(int aA) : a(aA) { };
 
};
 
class B
{
  private:
 
  public:
    int getAa(const A& aObj) { return aObj.a; };
};
 
int main(int argc, char *argv[])
{
  A objA(42);
  B objB;
  std::cout << "Value of A.a is " << objB.getAa(objA) << std::endl;
  return 0;
}