Thread: Class members accessing problems

I have this function:

Code:

void Estacao::mostraInformacaoEstacao()
{
    cout << "++ Estacao " << nome << endl;
    cout << "   tem ligacoes para:" << endl;

    //percorre as ligações existentes
    for (int i = 0; i < ligacoes.size(); i++)
    {
        //mostra a estação para a qual tem ligação
        cout << "     - " << ligacoes[i] << endl;

        for (int j = 0; j < linhas.size(); j++)
        {
            if (linhas[j].estacoes[0] == nome && linhas[j].estacoes[1] == ligacoes[i])
            {
                cout << "(" << linhas.distancia << ", " << linhas.tipo << ")";
            }
        }
    }
}

that's defined inside estacao.cpp, that includes Estacao.h and Sistema.h, where the class Estacao is defined.

My problem is that linhas (in the second "for" loop) is not defined inside the class Estacao, but in the class Sistema (defined in Sistema.h).

I get the error that linhas is undeclared.

It's not a problem of includes because I included every single header file used.

Sorry if this has been posted before but i'm in a hurry.

Thanks in advance.

Does your definition of Estacao look something like this:

Code:

#include "Sistema.h"

class Estacao : public Sistema
{
// class code
};

If not, then you can't access members of Sistema from Estacao. If you want to do this you have two immediately obvious options:

1) Inherit Sistema in Estacao (as displayed above)
2) you need to create a Sistema object inside of Estacao. Ex:

Code:

#include "Sistema.h"

class Estacao
{
// Everything else
private:
  Sistema sistema;
// class code
};

Then you can do:

Code:

sistema.linhas.size()

Assuming that linhas is public in Sistema. If it's not public I'm fairly sure you can figure out how to create a function to grab it.

When i try the inheritance i get the following error:

[CODE]
C:\[...]\Estacao.h expected class-name before '{' token

I never used inheritance before, so i don't knoe what might me causing this.

Did you #include the header file of the other class as shown in the example?

Originally Posted by jverkoey

Did you #include the header file of the other class as shown in the example?

Yes.

I can't see any obvious problem, so I'd say your best bet is to just create a Sistema member in your Estacao class and use that.