Instantiate class with non default constructor

[Richard]

I have two classes ClassA and ClassB.

ClassB has a constructor that has ClassA as it's parameter. How do I make
ClassB as a member object of ClassA so that ClassA (i.e. 'this') is passed
into ClassB on instatiation?

 

[John Harrison]

I have two classes ClassA and ClassB.

ClassB has a constructor that has ClassA as it's parameter. How do I make
ClassB as a member object of ClassA so that ClassA (i.e. 'this') is passed
into ClassB on instatiation?

class ClassA
{
public:
ClassA() : b(this) {}
private:
ClassB b;
};

Some compilers will give you warnings about this code because you are
using the this pointer before the ClassA object is constructed. But
provided you don't try and dereference the pointer in the ClassB
constructor it is OK.

john

 

[twoeyedhuman1111]

Your name better not be Richard Stallman...

 

[Richard]

Your name better not be Richard Stallman...

Nope my name is Richard Head.