Thread: Class-dilemma; One variable should contain all three classes

Hmm... No idea what that is. *googling*

I am sort of looking for that, I think... but, take this sample:

Code:

class A
{
private:
    int a;
public:
    int geta()
    {
        a = 1;
        return a;
    }
};

class B : virtual public A
{
private:
    int b;
public:
    int getb()
    {
        b = 2;
        return b;
    }
};

class C : virtual public A
{
private:
    int c;
public:
    int getc()
    {
        c = 3;
        return c;
    }
};

class D : public C, public B
{

};

int main()
{
    D* d = new D();
    cout << d->geta();
    cout << d->getc();
    cout << d->getb();


    return 0;
}

But, I want to do the above code "snippet"; without the fourth class D...
Is that even possible? No ? Not without letting B go to C or C go to B?

Or I could add a pointer in either C or B, then create one object of the one with the pointer? hmm... trying!

Code:

#include <iostream>

using namespace std;

class A
{
private:
    int a;
public:
    int geta()
    {
        a = 1;
        return a;
    }
};

class B : virtual public A
{
private:
    int b;
public:
    int getb()
    {
        b = 2;
        return b;
    }
};

class C : virtual public A
{
private:
    int c;
    B* bpointer;
public:
    C()
    {
        bpointer = new B();
    }

    void useB()
    {
        cout << bpointer->getb();
    }
    int getc()
    {
        c = 3;
        return c;
    }
};

int main()
{
    C* d = new C();
    cout << d->geta();
    cout << d->getc();
    d->useB();


    return 0;
}

Both works the way I want to, but not the way I thought I could do it!
It became so messy with a pointer instead of a fourth class. Damn!

It would be cleaner if class A could contain both B and C... but thats not an option.
Any other ideas ?

Sometimes the better path is to ask how to accomplish a particular goal than to ask how to follow a specific path. If you do the former and there is a better path to that goal then someone might volunteer a better path *to* that goal....the latter simply reinforces the travelling of a particular path, regardless if it is the right path or not...

Originally Posted by jeffcobb

Sometimes the better path is to ask how to accomplish a particular goal than to ask how to follow a specific path. If you do the former and there is a better path to that goal then someone might volunteer a better path *to* that goal....the latter simply reinforces the travelling of a particular path, regardless if it is the right path or not...

I second that. If you ask about how to solve a particular problem, maybe other people will tell you a way to do it that hasn't crossed your mind yet.

Originally Posted by ManyTimes

]
I have asked for "Any other ideas?", which mean if anyone has another way of doing this than what I've shown, if you haven't, or you do not want to share it for some odd reason, well do not post then.

*Sometimes I really miss thehelper.net*

We're just wishing you would tell us what "this" is. (Hint: Your first post is not it. Your first post is a homework assignment made by a teacher who doesn't know programming, but likes logic puzzles, but not real logic puzzles, rather the kind of logic puzzles that depend on using a word in a non-standard way.) Tell us what you're trying to accomplish, and we can help. The only thing we know is that you seem to think you don't want 100 "attributes", whatever they are, in one class. (As a note, if I'm counting correctly, there are 150-odd member ... things ... (constructors, functions, types, etc.) in the std::string class. And if they all belong together, then why not put them all together?) And maybe you have to have some inheritance (since you said you had to have three classes), or maybe not (since you said you could get away with just one class).

EDIT: Something more specific to help illustrate: you say that "everything I add to B will have to be called from C". So -- that implies that there should be some relationship between whatever B actually is and whatever C actually is; and that relationship will tell you how to code it (speaking in generalities). We don't know what that relationship is. We can guess until we get it right, but even we get tired of guessing after a while.