//complex.h
#pragma once
class complex {
private:
    double real;
    double imaginary;
public:
    complex(double, double);
    double Real() const;
    double Imaginary() const;
};


//complex.cpp

#include "complex.h"
using namespace std;

class complex  {
  private:
      double real;
      double imaginary;
  public:
     complex (double r = 0.0, double i = 0.0) :  real(r), imaginary(i) {  }
    double Real () const { return real; }
    double imaginary () const { return imaginary; }
};