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C - Language Theory

Pointers

  • Pointer is a variable that stores the address of the another variable. This variable can be int, float, char...etc.

Syntax:

Data Type variable_name:
int *p; (Pointer to an integer variable)
float *p; (Pointer to a float variable)
char *p; (Pointer to a character variable)

Pointers in C:

Pointer is a variable that stores the address of the another variable. This variable can be int, float, char...etc.

Syntax:
data type *variable_name;
int *p; (Pointer to an integer variable)
float *p; (Pointer to a float variable)
char *p; (Pointer to a character variable)

Example:


#include <studio.h>
int main (void)
{
int var = 20;
int *ip;
ip = &var;


printf("Address of var variable:%x", &var);
printf("value of var variable:%d", var);


/* address stored in pointer variable*/
printf("Address stored in ip variable:%x", ip);


/* access the value using the pointer*/
printf("Value of *ip variable:%d", *ip);


return 0; }


Output:


Address of var variable: bffd8b3c
value of var variable: 20
Address stored in ip variable: bffd8b3c
Value of *ip variable: 20