C Pre-processor-:

C Pre-processor 

1-Macro Pre-processor
2-Represented with #
3-Provides the ability for the inclusion of header files, macro expansions, conditional compilation.
4-Pre-processing is a program which performs before compilation.It only notice statement which    starts with #.
5-The work of pre-processor is that,it link the function body which are used in the program,under a header file.

For Example-: The pre-processor replaces the line #include<stdio.h> with the text of the file 'stdio.h',which declares printf() function.

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