C Nested structure:
A C Nested Structure can be defined in two ways:
By separate structure:
Defining a Nested Structure by separate structure simply means to use a structure inside another structure as a member of that structure. In this way, a single structure can be used in many structures.
Example 1:
#include<stdio.h> #include <string.h> struct Date { int dd; int mm; int yyyy; }; struct student { int roll_no; char name[30]; struct Date doj; }s; void main( ) { s.doj.dd=21; s.doj.mm=9; s.doj.yyyy=2014; s.roll_no = 1; strcpy(s.name, "Vibhuti Singh"); printf( "Student Date of Joining (D/M/Y) : %d/%d/%d\n", s.doj.dd,s.doj.mm,s.doj.yyyy); printf( "Student Enrollment No. : %d\n", s.roll_no); printf( "Student Name : %s\n\n", s.name); } |
Output
Student Date of Joining (D/M/Y) : 21/9/2014 Student Enrollment No. : 1 Student Name : Vibhuti Singh |
By Embedded structure
Defining a Nested Structure by embedded structure simply means to define a structure inside another structure. In this way, number of code lines decreases, however, a single structure can not be used in other structures.
Example 2:
#include<stdio.h> #include <string.h> struct student { int roll_no; char name[30]; struct Date { int dd; int mm; int yyyy; }doj; }s; void main( ) { s.doj.dd=21; s.doj.mm=9; s.doj.yyyy=2014; s.roll_no = 1; strcpy(s.name, "Vibhuti Singh"); printf( "Student Date of Joining (D/M/Y) : %d/%d/%d\n", s.doj.dd,s.doj.mm,s.doj.yyyy); printf( "Student Enrollment No. : %d\n", s.roll_no); printf( "Student Name : %s\n\n", s.name); } |
Output
Student Date of Joining (D/M/Y) : 21/9/2014 Student Enrollment No. : 1 Student Name : Vibhuti Singh |
Accessing a member of Nested Structure:
Syntax:
Outer_Structure.Nested_Structure.member
