CS 340 - 2/4/13

operator ++ or --

   ++i

   i++

   j  = ++i;   // unary   prefix
   j  = i++;   // binary  postfix

   j = +k;
   j = -k;

   j = m+n;
   j = m-n;

   Complex c1, c2;

   ++c1;   // c1.operator++( );

   c2 = ++c1;  // c2 = c1.operator++( );


 Note:  Using return-by-reference

class Complex
{
  ....
  Complex& operator++ ( );



};

Complex& Complex::operator++ ()
  {
    real_ = real_ + 1.0;  // ++real_

    return *this;
  }

The following return-by-refernce usage is an ERROR

Complex&  Complex::methodX(int deltaR, int deltaI)
{
    Complex temp (real_ + deltaR, 
                  imag_ + deltaI);
    
    return temp;
}

Homework what is the error???
    


The above is a great place for a return-by-reference

     CAUTION:  USE ONLY AS DIRECTED