what is pointer

Question Posted / sudipta kumar mondal

1 Answers
5203 Views
TCS, I also Faced
E-Mail Answers

what is pointer..

Answer / vignesh1988i

a pointer is an memory location in which it holds a particular ADDRESS of a particular data type. and mean while through the ADDRESS it will point to that corresponding value in that data typed variable.
DECLARATION OF A POINTER VARIABLE :
int *pointer_variable;

for eg:
int a=45; //line 1
int *b; // line 2
b=&a; //line 3
printf("%d\n",*b); //line 4

explanation:

line 1 :
consider let address of the location 'a' be 1000, which contains a value 45 of integer data type.
line 2 :
*b , represents the integer pointer which can hold an integer variable address.
line 3 :
when we take any variable such as int a or int c etc, when we call as 'a' we will refer to the content inside 'a' (for eg.),in the same way as in the above coding *b is given . but b=&a; this means when we call 'b' the content (ie) the address of variable 'a', and that 'b' will be pointing indirectly the value of 'a' through the 'a's address.
line 4 :
when we want to refer to that pointed value we must give as *pointer_variable & here *b when you give the same 45 will get printed.

thank u

Is This Answer Correct ?

5 Yes

0 No

Post New Answer