const expression needed for static class initialization

Question

This program may look like foolish program but i want to know the solution for it

#include <iostream>

using namespace std;

class base
{
    public:
     static int i;
     static int &j = i;
};

int base::i=9;

int main()
{

    cout<<base::j<<" "<<base::i;

    return 0;
}

when i am compiling this program i am getting the error "const expression needed for static class initialization" can anyone help me thanks in advance

Angew is no longer proud of SO · Accepted Answer · 2013-05-28 09:57:28Z

3

Simple: move it out of class as well:

#include <iostream>

using namespace std;

class base
{
    public:
     static int i;
     static int &j;
};

int base::i=9;
int &base::j=base::i;

int main()
{

    cout<<base::j<<" "<<base::i;

    return 0;
}

Live example

answered May 28, 2013 at 9:57

Angew is no longer proud of SO

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1 Comment

Angew is no longer proud of SO Over a year ago

@user2413497 If it works for you, you can accept the answer (green tickmark). That's how SO works.

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