CODEWITHSUNDEEP
c++
ReddestHorse
ReddestHorse

Reputation: 11

Accessing class object

I have three .h and three .cpp files along with them.

I have made an object of a class in the first .h (say 1.h) in a class that is in 2.h. I want to use that class object in my 3.cpp.

1.h

class One
{ 
   bool pressed;
   ...
}

2.h

#include "1.h"
Class Two
{
public:
    One object;
    ...
}

3.h

#include "2.h"
Class Three
{ ...
}

3.cpp

#include "3.h"

void Three::OnPressed()
{
   object.pressed = true;
}

It allows me to make the object without complaints, however, my program gives this error when run:

error C2065 'object': undeclared identifier

I don't think this is a hard question, but I had trouble trying to explain my problem through a search bar. If you could help me out I'd appreciate it.

Upvotes: 0

Views: 72

Answers (1)

Remy Lebeau
Remy Lebeau

Reputation: 596256

OnPressed() is a member of Three, but Three does not derive from Two, so Three does not have any object member that OnPressed() can access. That is what the compiler is complaining about.

You would need to either:

  1. make Three derive from Two

    class Three : public Two

  2. give Three a member that is an instance of One (just like you did with Two):

    class Three
{
public:
    One object;
    void OnPressed();
    ...
};

void Three::OnPressed()
{
    object.pressed = true;
}

    Or give it an instance of Two:

    class Three
{
public:
    Two object2;
    void OnPressed();
    ...
};

void Three::OnPressed()
{
    object2.object.pressed = true;
}

Upvotes: 1

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