Void: A data type in C++. When used as a parameter in a function call, it indicates there is no return value. void+ indicates that a generic pointer value is returned. When used in casts, it indicates that a given value is to be discarded.

Virtual Function: A function qualified by the virtual keyword. When a virtual function is called via a pointer, the class of the object pointed to determines which function definition will be used. Virtual functions implement polymorphism, whereby objects belonging to different classes can respond to the same message in different ways.

Virtual Base Class: A base class that has been qualified as virtual in the inheritance definition. In multiple inheritance, a derived class can inherit the members of a base class via two or more inheritance paths. If the base class is not virtual, the derived class will inherit more than one copy of the members of the base class. For a virtual base class, however, only one copy of its members will be inherited regardless of the number of inheritance paths between the base class and the derived class.

Variable Name: The symbolic name given to a section of memory used to store a variable.

Variable: A name that refers to a value. The data represented by the variable name can, at different times during the execution of a program, assume different values.

Union: A data type that allows different data types to be assigned to the same storage location.

Typedef Name: A name given to a type via a type-name definition introduced by the key-word typedef.

Type Conversion: A conversion of a value from one type to another.

Turbo C++: A version of the C++ language for personal computers developed by Borland.

Truncation: An operation on a real number whereby any fractional part is discarded.

Translation: Creation of a new program in an alternate language logically equivalent to an existing program in a source language.

This: This is a pointer to the current object. It is passed implicitly to an overload operator function.

Temporary Variable: A variable whose storage is allocated from the stack. The variable is initialized each time the block in which it is defined is entered. It exists only during the execution of that block.

Syntax Error: An error in the proper construction of a C++ expression.

Syntax: Rules that govern the construction of statements.