Understanding Header Files

 Collection of pre-defined Function Necessary For the operation of a program.

                                Names of the header files finish with .H

Header Files

1-      String. H –Contains String Manipulation Function.

2-      Alloc. H – Includes memory allocation Function.

3-      Time .H – Consists of time related Function

4-      Conio. H – Console input & output Function

5-       Ctype  H – Include type conversion function

6-      Stdlib. H – Standard Library function

7-      Graphics .H – Has Graphics Function

8-      Dos .H – Define date , time & Sound Related Function

9-      Process. H – Contains System Related Function

Note -

Several of the header files provided with the OS end with. Inc (Include file)

Additional header files Can be Found in Either /User/Include or

Usr/Include/Sys directory.

 The Main ( ) is surrounded by the Curly bracket has two parts.

Declaratory part – Declaring Variables

Achievable part – Contain the Code to be executed.

Without Main ( ), we cannot execute any C program.