C + + and OO Num Comp. Sci. Eng.-Part 5.

Class

The Class keyword provides a containment mechanism that combines the data and the methods of manipulating the data to be used as a built-in type.

A class can contain a private part that is accessible only to its members and friend classes, and the public part can be accessed anywhere in the program.

Constructors have duplicate names with classes. Destructors are used to define operations when objects are destroyed.

class pt2d { // class for 2D pointsprivate: // private membersdouble x; // x coordinatedouble y; // y coordinatepublic: // public members pt2d(double r, double s) { // constructorx = r; y =s;}void move(double, double); // move to new positionvoid move(pt2d); // move to new positionvoid draw() const; // a const memberfriend double norm(pt2d); // a friend};

C + + and OO Num Comp. Sci. Eng.-Part 5.