0 Introduction-Structures

The C language allows us to create custom data types.

The structure is a custom data type which c combines different data types .

The structure is a custom data type which combine different data types to form a new user define data type.

Definition

A structure is a collection of variable reference under one name providing a convincible means of related information together.

Format: struct tag_name

{

data _type member1;

data_type member2;

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

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

};

here a keyboard struct declares a structes to hold the details of field of different data types.

Example:

struct addr

{

char name [30];

char city [15];

int pincode ;

};

Creating Structure variable

structure can be created in two ways:

1. declaration using tagname anywhere in the program.

Example:

struct book

{

char name [30];

char author [25];

float price;

};

struct book book1 book2

2. it is also allowed to combine structure declaration and variable declaration in one statement.

Example:

struct person

{

char *name;

int age;

char*address;

};

p1,p2,p3

while declaring structure variable along with their definition, the use of tag-name is optional.

Struct

{

char *name;

int age;

char * address;

}

p1,p2,p3

Image showing how the given value allocate in structure with the help of an example >

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