What Is The C Preprocessor ? Explain With The Help Of An Example. Explain In Brief Different Types Of Memory Allocation Functions Explain In Brief The Procedure Oriented Progrmming , Modular Programming And Object Oriented Programming. What Is Recursion Explain With The Help Of An Example

C Preprocessor is historically a seperate computer program which simply searches some things and replaces them with others.

Example:

#define PI 3.14

float f = PI; /* PI will be replaced with 3.14 by C Preprocessor*/

/* The contents of the other file will be pasted by C Preprocessor*/
#include "myotherfile.c"

With respect to C, there are two memory allocation functions:

Void * malloc(size_t number of bytes);
void * calloc(size_t sizeofEachItem, int numberOfItems);

first one requires you to precisely tell number bytes required
The other one asks you to tell the size of each item and number of items required

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