A class is defined and implemented. The definition of the class sets the fields and the prototypes of the methods, and the implementation defines the individual methods.

The methods can be divided into four categories: constructors, destructors, modifiers, and inspectors. One of the constructors is called when the object is created and the destructor is called when it is destroyed. A constructor without parameters is called a default constructor. A class is not required to have a constructor; in fact, it does not have to have any members at all. However, I strongly recommend that you include at least one constructor to your classes. If there is at least one constructor, one of them has to be called when the object is created, which means that unless the default constructor is called, parameters have to be passed to the constructor when the object is created. Methods may be overloaded the same way as freestanding functions and a class may have several constructors as long as they have...