Question

Explain general form of class declaration.

Answer 1

Generally, a class declaration has the following form.

1. The term class suggests the following is an abstract data type class name.
2. The body of a class is contained in braces and concluded with a semicolon.
3. The class body contains declarations for variables and functions. Visibility labels are classified as either private or public. A colon follows the keywords.
4. Members marked as private can only be accessed from within the class. This protects data from external use and is an essential element of OOP.
5. The public members can be accessed from outside the classroom as well.
6. If both visibility labels are lacking, class members are set to private by default. This class is entirely concealed from the outer world and has no use.

Example: An example of a class declaration might be:

class item // specify a class
{
         int number; // class data
         float cost;
public:
         void getdata (int a, float b);
         void putdata (void);
};