Enumeration access in different class

Question

I have enumeraion in Class A and class B have class A instance as member. How can I access Class A enumeraion in Class B using this instance

Class A{
   enum ab{
   a 1,
   b 2 };
}

IN class B i need to get this enumeraion

your code does not compile at all, Class should be class, there should be `=` between names and values. — nio, Jul 25 '13 at 15:26
See also [Declaring an enum within a class](http://stackoverflow.com/q/2503807/96780). — Daniel Daranas, Jul 25 '13 at 15:29

score 3 · Answer 1 · edited May 23 '17 at 12:21

3

A::ab

As long as ab is public.

Of course you need to fix the syntax of your enum first.

See also this question.

edited May 23 '17 at 12:21

Community

1
1

answered Jul 25 '13 at 15:26

Daniel Daranas

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score 2 · Answer 2 · answered Jul 25 '13 at 15:26

2

Like this:

class A
{
public:
   enum ab{
   a = 1,
   b = 2 };
}

class B
{
   A::ab myVariable;
}

answered Jul 25 '13 at 15:26

Nikola Dimitroff

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score 2 · Answer 3 · answered Jul 25 '13 at 15:27

2

You access the type via

A::ab;

and the values via

A::a;
A::b;

Of course, this assumes ab is public.

answered Jul 25 '13 at 15:27

Stefano Falasca

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nio · Accepted Answer · 2013-07-25T15:33:59.657

1

#include <iostream>
using namespace std;

class A{
   public:
   enum ab{
   a= 1,
   b= 2 };
};

class B{
    public:
    void test()
    {
        enum A::ab x=A::a;
        cout << "test A::a = " << x << endl;
        x=A::b;
        cout << "test A::b = " << x << endl;
    }
};

int main()
{
    cout << "A::a = " << A::a << endl;
    cout << "A::b = " << A::b << endl;
    class B b;
    b.test();
}

The enumerated names a,b do reside in class A namespace so, you can access them using A:: prefix like A::a.

edited Jul 25 '13 at 15:33

answered Jul 25 '13 at 15:28

nio

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can I use A::a to get 1 – Sijith Jul 25 '13 at 15:29

Enumeration access in different class

4 Answers4