POINTERS TO STRUCTURES

POINTERS TO STRUCTURES:

We know that pointer is a variable which holds address of a variable (int or float or any datatype )or address of a function.

            Similarly a pointer to a structure can also be defined which holds the base address of structure member variable.

           

A pointer to a structure can be declared as follows:

struct tagname *variable;

Eg.,

struct book

{

char name[10];

int pages;

float price;

};

struct book *ptr;

           

The members of the structure can be accessed through pointer variable using arrow operator( -> )which is also known as member selection operator.

           

The members of the structure book can be accessed as:

ptr->name

ptr->pages

ptr->price

Ø  A Program on pointers to structures

void main()

{

struct student

{

char name[10];

int rollno;

float avg;

};

struct student s1={“Ajay”,5,80.5};

struct student *ptr;

ptr=&s1;

printf(“name=%s\n”ptr->name);

printf(“rollno=%d\n”,ptr->rollno);

printf(“avg=%f”,ptr->avg);

}