CPP this Pointer

The this Pointer.

• Every class member function has a hidden pointer: the this pointer, which points to "this" individual object.
• In some cases the this pointer can be a powerful tool.
  Here is an Example

  #include <iostream>
  using namespace std;
  class Rectangle {
    public:
      void setLength(int length)
        { this->length = length; } // this object length= parameter length
      int getLength() const
        { return length; }
  
      void setWidth(int width)
        { this->width = width; } // this object width= parameter width
      int getWidth() const
        { return width; }
  
    private:
      int length;
      int width;
  };
  int main() {
     Rectangle * pRectangle = new Rectangle;
     pRectangle->setLength(34);
     cout << "The Rectangle length is " << pRectangle->getLength() << endl;  
     delete pRectangle;
     pRectangle=0; // Good rule but not necessary at this place
     return 0;
  }

  When we run this application the result could be:

  The Rectangle length is 34

  You can download this example here (needed tools can be found in the right menu on this page).