ARRAY OF STRUCTURE

• We can create an array of structure just like we create an array of built in data type such as int, float etc.

• A single structure variable can store only information of single entity. In other words, a single structure variable can store only single record.

• Consider the following structure variable declaration of emp structure. Variable e1 can be used to store record of single employee only.

struct emp e1;

• In practical life we need to store multiple records of multiple employees with common information for all.

• In this case we can simply declare a structure variable as an array just like normal array declaration of basic data types which is called Array of Structure.

• The only difference is that in array of structure each array element will be of type structure.

• Note that structure variable p1 is declared as an array of structure. Memory representation for p1 will be as follow:

• Structure variable p1 can store three records of product and we can access each individual record using array index along with structure variable name just like normal array.

• For example to access first record or element we can simply use p1[0], to access second and third record p[1] and p1[2]

• Individual member of structure can be accessed with the same method as we did before i.e. using dot operator along with structure variable name and member name.

• For example, to access individual members of first record we can do so as follow:

Syntax:

struct_var_name [index]  . member_name

Example:

P1[0].pid  = 101;

• Consider the following example where we have used array of structure to store records of five employees.

//Program to declare array of structure to store records of five employees.
#include "stdio.h"
#include "conio.h"

struct product   // structure declaration
{
	int pid;
	char name[20];
	int qnty;
	float price;
};

void main()
{
   struct product p1[5];   //structure variable declaration where P1 is array of structure 
   int i;
   for( i = 0 ; i < 5 ; i++)   //read data
   {
      printf(“\n Enter Prduct ID, Name, QNT and Price :” ) ;
      scanf(“%d %s %d %f”, &p1[i].pid, &p1[i].name, &p1[i].qnty,
      &p1[i].price);
   }
   printf(“\n ID\tName\tQNT\tPrice” ) ;
   for( i = 0 ; i < 5 ; i++)   // print data
   {
      printf(“\n%d %s %d %f”, p1[i].pid, p1[i].name, p1[i].qnty,
      p1[i].price);
   }
   getch();
}