Help - how to initialize reference variable?

[BJT]

Hi,

This is an urgent issue so your help would be highly appreciated.

The following code is extracted from a real project.

#include <iostream>
using namespace std;

class B
{
  public:
    B(const int &n) : i(n)
    {
      cout << "In B constructor" << endl;
    }

  private:
    int &i;
};

int main()
{
  int i = 28;
  B b(i);

  return 0;
}

In this code snap, B::i must be a reference and B's constructor must take "const int &n". When building this code, I got compile error:

const_constructor.cpp: In constructor 'B::B(const int&)':
const_constructor.cpp:8: error: invalid initialization of reference of type 'int&' from expression of type 'const int'

Could someone please tell me how I fix this compile error?

Thanks,
BJT