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Advanced Programming Techniques in C

Structure and Pointers

Learn how to create a pointer to a structure and an array of structures in C.

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What is a structure pointer?

A pointer pointing to a struct is known as a structure pointer.

Example program

The program given below demonstrates the use of a structure pointer.

C
# include <stdio.h>



int main( )

{

	// Declare structure book

	struct book 

	{

		char n[ 20 ] ;

		int nop ;

		float pr ;

	} ;

    // Initialize structure variable

	struct book b = { "Basic", 425, 135.00 } ;

	// Declare pointer to structure variable

    struct book *ptr;

	// Store address of structure variable

    ptr = &b;

    // Access structure elements using dot operator

    printf ( "%s %d %f\n", b.n, b.nop, b.pr  ) ;

    // Access structure elements using arrow operator

    printf ( "%s %d %f\n", ptr->n, ptr->nop, ptr->pr  ) ; 

}

Explanation

In the code given above, ptr is a pointer to a structure, not a structure variable. Therefore, we cannot use ...