C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast


What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement


What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop


What is Function C User Defined Functions C Recursion C Passing Parameters


Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register


What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings


What is String C String Functions


What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer


What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def


What is Union


What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

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The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

Pointer to Structure

In C, the pointer is a variable that holds the address of another data variable. A pointer to structure means a pointer variable can hold the address of a structure. The address of structure variable can be obtained by using the '&' operator. All structure members inside the structure can be accessed using pointer, by assigning the structure variable address to the pointer. The pointer variable occupies 4 bytes of memory in 32-bit machine and 8 bytes in 64-bit machine.

Syntax - Pointer to Structure

struct structname {
data type member1;
data type member2;
}variable1, *ptrvariable1;     //Pointer to structure declaration

Accessing Structure Members Using Pointers

A structure member can be accessed using its corresponding pointer variable. To access structure members, the (.)dot operator is used with the pointer variable.


The (•)dot operator has a higher precedence than operator ' * '. The alternative to (•)dot operator is −> operator. Now it can also be written as,

*ptrvariable −> member1;

The "−>" can be combined with (.)dot (or) period operator to access a structure members.

C program - Pointers to Structure

Lets code pointers to structure and have some fun

#include <stdio.h>
int main()
//Structure Declaration
struct student{
char name[40];
struct avg{
int sub1, sub2, sub3;
float average;
}stud1, *studptr = &stud1;  //Pointer variable stores the address of structure variable
int total;
printf("Enter the Name of the student : ");
scanf("%s", (*studptr).name);
printf("\n------Enter the marks of the student------ ");
printf("\nEnter sub1 marks : ");
printf("\nEnter sub2 marks : ");
printf("\nEnter sub3 marks : ");
total = (studptr->avg.sub1 + studptr->avg.sub2 + studptr->avg.sub3);
studptr->avg.average = total / 3;
printf("\n-------Student Details-------\n ");
printf("Name: %s", studptr->name);
printf("\nsub1: %d ", studptr->avg.sub1);
printf("\nsub2: %d ", studptr->avg.sub2);
printf("\nsub3: %d ", studptr->avg.sub3);
printf("\nAverage: %f ", studptr->avg.average);
return 0;
  • Enter the Name of the student :siva
  • ------Enter the marks of the student------
  • Enter sub1 marks :78
  • Enter sub2 marks :82
  • Enter sub3 marks :80
  • -------Student Details-------
  • Name: siva
  • sub1: 78
  • sub2: 82
  • sub3: 80
  • Average:80.000000


The above program illustrates that the structure members are accessed through pointer variable studptr.

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