Contoh Aturcara C++ -Constructor & Destructor

#include "iostream"


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