Array of class with a const member in C++

Question

I want to initialize an array of class which contains a const member that must be initialize at construction.

#include <iostream>
class A
{
    private:
        const int var_;

    public:
        A(const int var) : var_(var){};

        int getVar(){return var_;}
};

class B
{
    private:
        A tab[2];

    public:
        B() : tab{2,5} {}; // The trick should be here, I think !

        int getA(int index) { return tab[index].getVar();}
};

int main(void)
{

    B b; // constraint : Dynamic allocation not allowed
    std::cout << b.getA(0) << std::endl;

    return 0;
}

This code does not compile because the constructor for class B is not right. Thanks for your help, Nicolas

Does the compile just say "not right", or does it give a few details? If it gives details tell us. — doctorlove, Jul 11 '13 at 12:19
@Jimbo you are right, it is the same question. Sorry for that. — nbout, Jul 11 '13 at 12:31
@boutboutnico: no worries, it was an interesting question. I didn't know the answer but have learnt something too :) — Jimbo, Jul 11 '13 at 12:32

score 0 · Answer 1 · answered Jul 11 '13 at 12:18

0

The command

g++ -std=c++11 1.cpp

compiles the code above just fine. Running 1.exe prints 2 in the console.

P.S: g++.EXE (GCC) 4.9.0 20130616 (experimental)

answered Jul 11 '13 at 12:18

Sergey K.

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I cannot used c++11 but thanks. – nbout Jul 11 '13 at 12:22
2

Your code uses C++11 features. – Sergey K. Jul 11 '13 at 12:49

Array of class with a const member in C++

1 Answers1