Structures

Nested Structures :

Structure within structure is called as nested structures. We can declare a structure within another structure. 

Example :
struct struct1
{
    struct1-member declarations

    struct sub-structA
    {
       substructA-member declarations
     }sub-structA-variable;

    struct sub-structB
    {
       substructB-member declarations
     }sub-structB-variable;
   
     |
     |
     |
}struct1-variablename;

Example:
struct Office
{
  char location[30];  

 struct Dept
 {
   int dno;
   char dname[30];
  }d;

 struct Emp
 {
   int eno;
   char ename[30];
  }e;
}O;