Structure, Declaration, Declaring Structure Variable

Structure:-

          A variable declared in ‘C’ holds data of one type at one time. Arrays hold a number of data items of the same type. But if we want to process many data items of different types together as a unit, them array is not useful. In order to solve this problem, C provides a data type, called structure which enables us to store and process different data types at the same time.

          Def- A structure is a collection of one or more variables grouped as a unit under a single name for easy processing.

          The construct structure is mainly used to store a “record” that contains different data types.

Declaration:-

          Syntax:-

                             struct name

{

data_type mem1;

data_type mem2;

-----------------

-----------------

data_type mem-n;

};

          In this declaration, struct is a keyword, ‘name’ is the name that identifies structure of this type and mem1, mem2, mem-n, are individual member declarations.

Ex:-

#include<stdio.h>

void main()

{

struct simple

{

int num;

char ch;

};

struct simple ez1;

ez1.num=2;

ez1.ch=’z’;

printf(“\n ez %num= %d,ez1.ch=%c\n”,ez1.num,ez1.ch);

}

Declaring Structure Variable:-

          After the declaration of structure data type, we may declare one or more variables to be of that type. As in above example ez1 is the variable of type simple.