Structure

structure can be defined as a user defined data type that contains a range of other data types . we can say that it is a composite type

lets see example of a structure of a book database

struct structure_name

{

Char title[30];

Char author[30];

Int page;

};

So we can see that  the structure starts with a struct keyword followed by the structure name and then we have the different fields of the structure or data type declared

Individual fields of a structure can be assessed by the dot operator

We can declare other variable of the structure we have made

For example

struct employee  //structure defination

{

char name[20];

float salary;

int age;

}

main()

{

struct employee  emp1,emp2; // structure variable declaration

emp1.age = 28;  //assigning vale to the age field of the structure

printf(" age is %d \n",emp1.age); //printing the structure field content

getch();

}

In this example we first define the  body of the structure above the main function , then we declare some variable of the structure type and then we use the dot operator with the structure variable to assign value to one of the field of the structure , and last we display the content of the structure

We can pass structure to a function just like any other variable

Function( employee) // passing a structure variable employee to a function

Function_2(struct employee employee2) // accepting the passed value

{

printf(“%d”,employee2.age);

}

We can also return a structure like this

employee1 = read_enployee();

The function look likes this

read_employee()

{

struct employee emp

scanf(“%d”,&emp.age);

return emp;

}