C / C++ / MFC

char c = 'c';
char d = 'd';
const char* p1 = &c;
char* const p2 = &c;
 
  *p1 = 'x';  // illegal
  p1 = &d;    // legal
  
  *p2 = 'z';  // legal
  p2 = &d;    // illegal

// class A ( a.h )
class B;
class A
{
  A( B* pPointerToClassB );
  B* m_pPointerToClassB;
}

// class A ( a.cpp )
#include "b.h"
A::A( B* pPointerToClassB ) : m_pPointerToClassB( pPointerToClassB )
{
}
//...

// a.h
class B;
class A
{
  A();
  B* m_pB;
}
// a.cpp 
#include "b.h"
A::A( )
{
 m_pB = new B( this );
}

// b.h
class A;
class B
{
  B( A* pA );
  A* m_pA;
};

// b.cpp
#include "a.h"
B::B( A* pA ) : m_pA( pA )
{
}

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

TOXCCT >>> GEII power

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)