Data Structure Structure

Structure

A composite data type used to define a grouped list of variables, to be placed under one name in a block of memory is called structure. Thus, by using a single pointer to the structure, we can get access to different variables.

Syntax:

struct structure_name   
{  
   data_type member1;  
   data_type member2;  
    .  
    .  
    data_type member;  
};

Structure Advantages:

Variables of different data types can be held by a structure.
Objects containing different types of attributes can be created.
The data layout can be reused across programs.
Other data structures like linked lists, stacks, queues, trees, graphs, etc., can also be implemented by a structure.

Structure Advantages Example :

#include<stdio.h>  
#include<conio.h>
void main( )  
{  
struct employee  
{  
int id;  
float salary;  
int phone;  
} ;  
struct employee e1,e2,e3,e4,e5;  
printf ("\nEnter id, salary & phone no. of 5 employees\n");  
scanf ("%d %f %d", &e1.id, &e1.salary, &e1.phone);  
scanf ("%d %f %d", &e2.id, &e2.salary, &e2.phone);  
scanf ("%d %f %d", &e3.id, &e3.salary, &e3.phone); 
scanf ("%d %f %d", &e4.id, &e4.salary, &e4.phone);  
scanf ("%d %f %d", &e5.id, &e5.salary, &e5.phone);
printf ("\n Entered Data: ");  
printf ("\n%d %f %d", e1.id, e1.salary, e1.phone);  
printf ("\n%d %f %d", e2.id, e2.salary, e2.phone);  
printf ("\n%d %f %d", e3.id, e3.salary, e3.phone);
printf ("\n%d %f %d", e4.id, e4.salary, e4.phone);  
printf ("\n%d %f %d", e5.id, e5.salary, e5.phone); 
getch();  
}

Output:

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