#include <iostream.h>
#include <math.h>

// class declaration

class Complex
{
  // friends list
  friend float addreal(Complex&, Complex&);
  friend float addimag(Complex&, Complex&);
  private:
    float real;
    float imag;
  public:
    Complex(float = 0, float = 0);  // constructor
    void display();

};

// implementation section

Complex::Complex(float rl, float im)
{
  real = rl;
  imag = im;
}

void Complex::display()
{
  char sign = '+';

  if(imag < 0) sign = '-';
  cout << real << sign << fabs(imag) << 'i';

  return;
}

// friend implementations

float addreal(Complex &a, Complex &b)
{
  return(a.real + b.real);
}

float addimag(Complex &a, Complex &b)
{
  return(a.imag + b.imag);
}

int main()
{
  Complex a(3.2, 5.6), b(1.1, -8.4);
  float re, im;

  cout << "\nThe first complex number is ";
  a.display();
  cout << "\nThe second complex number is ";
  b.display();

  re = addreal(a,b);
  im = addimag(a,b);
  Complex c(re,im);  // create a new Complex object
  cout << "\n\nThe sum of these two complex numbers is ";
  c.display();

  return 0;
}