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constructors and destructors

constructors and destructors

/*******************************************************
*     MYCPLUS Sample Code - http://www.mycplus.com     *
*                                                     *
*   This code is made available as a service to our   *
*      visitors and is provided strictly for the      *
*               purpose of illustration.              *
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* Please direct all inquiries to saqib at mycplus.com *
*******************************************************/

#include 


class rectangle {              // A simple class
   int height;
   int width;
public:
   rectangle(void);            // with a constuctor,
   int area(void);             // two methods,
   void initialize(int, int);
   ~rectangle(void);           // and a destructor
};


rectangle::rectangle(void)     // constuctor
{
   height = 6;
   width = 6;
}


int rectangle::area(void)      //Area of a rectangle
{
   return height * width;
}


void rectangle::initialize(int init_height, int init_width)
{
   height = init_height;
   width = init_width;
}


rectangle::~rectangle(void)    // destructor
{
   height = 0;
   width = 0;
}


struct pole {
   int length;
   int depth;
};





main()
{
rectangle box, square;
pole flag_pole;


   cout << "The area of the box is " <<
                       box.area() << "\n";
   cout << "The area of the square is " <<
                       square.area() << "\n";


// box.height = 12;
// box.width = 10;
// square.height = square.width = 8;


   box.initialize(12, 10);
   square.initialize(8, 8);


   flag_pole.length = 50;
   flag_pole.depth = 6;


   cout << "The area of the box is " <<
                       box.area() << "\n";
   cout << "The area of the square is " <<
                       square.area() << "\n";
// cout << "The funny area is " <<
//                     area(square.height, box.width) << "\n";
// cout << "The bad area is " <<
//                     area(square.height, flag_pole.depth) << "\n";
}

// Result of execution
//
// The area of the box is 36
// The area of the square is 36
// The area of the box is 120
// The area of the square is 64

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