What are Character sets and Tokens in c++ ?

CHARACTER SETS AND TOKENS

Definition Of character set

A character set is a set of valid characters that a language can recognise . A character set represent any letter , digit , or any other sign . C++ has the following set:

Letters    :  A-Z , a-z

Digits :       0-9

Special Symbols :  Space   + - * / ^ \ () [] {} =  > <  . ' " $ , ; : ......etc.

White Spaces:  Blank space , Horizontal tab (->)Carriage return , new line , Form feed.

Other Characters :  C++ can process any of the 256  ASCII  characters.

TOKENS

The smallest individual unit in a program is known as Token. C++ has the following tokens:

Keywords, Identifiers,Literals , Punctuators and Operators.

Keywords : These are the words that convey a special meaning to the language compiler.

Identifiers : An Identifier is the name given by user for a unit of a program.

Literials : Literials are data items that never change their value during a program run.

C++ allows several kinds of literials 

1. integer - constant

2. character - constant

3.floating - constant

4.String - constant