CSE2305 Topic 19: C++ Operator Overloading

CSE2305 Topic 19: C++ Operator Overloading:

An important use of operator overloading^¤

• Because we can overload the operators << and >>, we can allow user-defined classes^¤ to perform I/O just like inbuilt types (!)
  
• For example:

  #include 
  
  class Complex
  {
  public:
   Complex(float re, float im)
   : myReal(re), myImag(im)
   {}
  
   friend istream& operator>>(istream&, Complex&);
   friend ostream& operator<<(ostream&, const Complex&);
  
  private:
   float myReal;
   float myImag;
  };
  
  istream& operator>>(istream& in, Complex& c)
  {
   double real, imag;
   in >> real >> imag;
   if (in.good())
   {
    c.myReal = real;
    c.myImag = imag;
   }
   return in;
  }
  
  ostream& operator<<(ostream& out, const Complex& c)
  {
   out << "(" << c.myReal << "," << c.myImag << ")";
   return out;
  }