list0808.cpp

teach yourself C++ in 21 days 第五版

// Listing 8.8
// Using the this pointer

#include <iostream>

class Rectangle
{
  public:
    Rectangle();
    ~Rectangle();
    void SetLength(int length) 
      { this->itsLength = length; }
    int GetLength() const 
      { return this->itsLength; }

    void SetWidth(int width) 
      { itsWidth = width; }
    int GetWidth() const 
      { return itsWidth; }

  private:
    int itsLength;
    int itsWidth;
};

Rectangle::Rectangle()
{
   itsWidth = 5;
   itsLength = 10;
}
Rectangle::~Rectangle()
{}

int main()
{
   using namespace std;
   Rectangle theRect;
   cout << "theRect is " << theRect.GetLength() 
      << " feet long." << endl;
   cout << "theRect is " << theRect.GetWidth() 
      << " feet wide." << endl;
   theRect.SetLength(20);
   theRect.SetWidth(10);
   cout << "theRect is " << theRect.GetLength()
      << " feet long." << endl;
   cout << "theRect is " << theRect.GetWidth()
      << " feet wide. " << endl;
   return 0;
}