Category 

C++-Specific Keywords, Type specifiers 

Syntax  

<classkey> <classname> <baselist> { <member list> }

• <classkey> is either a class, struct, or union.
• <classname> can be any name unique within its scope.
• <baselist> lists the base class(es) that this class derives from. <baselist> is optional
• <member list> declares the class's data members and member functions.

Use the class keyword to define a C++ class. 

Within a class:

• the data are called data members
• the functions are called member functions