What does this mean?

[ApertureScience101]

What does this block of code mean? And what does it do exactly?

  CRectangle::~CRectangle () 
  {   
     delete width;   
     delete height; 
  }

[LB]

It is the destructor for a class named CRectangle.

As for what it does, that depends entirely on how width and height are defined. They are probably useless pointers and are only dynamically allocated for demonstration purposes.