C Programming - Pointers - Discussion

Thanks Pavan Sharath for clearify Structure.

To access data members of a structure we have to create a variable if thar variable if normal variable then we will use "."(dot) operator if thar is pointer variable then we will use "->"arrow operator.
example:
#include<stdio.h>
struct st
{
int x;
};
main()
{
struct st var1; creating normal variable
struct st *var2; creating pointer variable
//accessing data members of structure normal variable
scanf("%d",var1.x);
printf("%d",var1.x);
//accessing data membres of structure pointer vairables
scanf("%d",var1->x);
printf("%d",var1->x);
}

Pointer is a address of value. Then will find the address if you are submit that values.

Can any one help me by telling how execute programs on India bix (c) through online compiler by giving my own input at command prompt.

An individual structure member can be accessed in terms of its corresponding pointer variable by writing.

ptr -> member.

Can anybody say what is the actual difference, when we acces the member of struct by using "." operator & "->" operator ?

Pointer variable can also be accessible by two type
Type:1
(*a).p//if a is the pointer variable of p.
type:2
It can also be written same as..
a->p;

Pointer definition: it can store the & of the another variable, so we are using pointer, using arrow "->", operator, ". ", dot operator are used in pointer.

What is enum? in what situation we use it? can anybody help me out? please.

enum is a one of the userdefined datatype,and it defines the list of keywords.

Ex:
enum rainbow
{
1.Red
2.Orange
3.Yellow
4.Green
5.Blue
6.Indigo
7.Violet
} ;