Explain nested structures with examples.

C provides us the feature of nesting one structure within another structure by using
which, complex data types are created. For example, we may need to store the
address of an entity employee in a structure. The attribute address may also have
the subparts as street number, city, state, and pin code. Hence, to store the address
of the employee, we need to store the address of the employee into a separate
structure and nest the structure address into the structure employee. Consider the
following program.

#include<stdio.h>
#include<conio.h>
struct address
{
 char city[20];
 int pin;
 char phone[14];
};
struct employee
{
 char name[20];
 struct address add;
};
void main ()
{
 struct employee emp;
 clrscr();
 printf("Enter employee information?\n");
 scanf("%s %s %d %s",emp.name,emp.add.city, &emp.add.pin,
emp.add.phone);
 printf("Printing the employee information....\n");
 printf("name: %s\nCity: %s\nPincode: %d\nPhone:
%s",emp.name,emp.add.city,emp.add.pin,emp.add.phone);
 getch();
}