In the first group, we put those that were also present in theĬ programming language and have been carried over intoĪuto const double float int short struct unsignedīreak continue else for long signed switch voidĬase default enum goto register sizeof typedef volatileĬhar do extern if return static union while

The reserved words of C++ may be conveniently placed into several The same sense that others use reserved word. As an illustration, some authors use keyword in Nevertheless, be aware that the terminology is Which are sometimes collectively referred toĪs keywords. One+two (cannot use special characters, like + character)Ī Caution: reserved words, 'keywords,' and predefined identifiers. Hello! (cannot use special characters, like exclamation mark) Unlike reserved words, predefined identifiers may be redefined- but generally not good idea.Some predefined identifiers (cout and cin).Identifiers: must begin with letter or underscore (best not.Identifiers: consist of letters, digits, and underscore character (_).Identifiers: used as names for variables, constants, and functions.

Reserved words: always lowercase, each considered to be single symbol with special meaning.

Some tokens made up of two characters (with no blank)-still considered as single symbol.

Include mathematical symbols and punctuation marks.

Token: divided into special symbols, word symbols, and identifiers.

Token: smallest individual program unit.

Every C++ program has one and ONLY one function called main().

Subprogram or function is collection of statements that, when invoked, performs some task.

C++ program: collection of one or more subprograms-called functions.

Metalanguage: term used to describe syntax rules.

Compiler checks that program follows syntax rules.

Programming instructions must be written according to syntax rules.

Semantic rule: meaning of the instruction.

Programming language: a set of rules, symbols, and special words.

Syntax: rules that specify which statements (instructions) are legal.

Programming: planning/creating a program.

Computer program: sequence of statements designed to accomplish some task.

Basic programming language definition