Source Code : Pointers In C

Pointers

Pointer is a special variable that stores address of another variable

Addresses are integers. Hence pointer stores integer data

Size of pointer = size of int

Pointer that stores address of integer variable is called as integer pointer and is declared as int *ip;

Pointers that store address of a double, char and float are called as double pointer, character pointer and float pointer respectively.

char *cp

float *fp

double *dp;

Assigning value to a pointer

int *ip = &a; //a is an int already declared

Example:

int a;

a=10;  //a stores 10

int *ip;

ip = &a;  //ip stores address of a (say 1000)

ip  :  fetches 1000

*ip   :   fetches 10

* Is called as dereferencing operator