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Answer Posted / 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
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