{"id":15208,"date":"2023-03-30T10:58:08","date_gmt":"2023-03-30T10:58:08","guid":{"rendered":"https:\/\/www.prepbytes.com\/blog\/?p=15208"},"modified":"2024-01-17T11:56:03","modified_gmt":"2024-01-17T11:56:03","slug":"what-is-nested-structure-in-c","status":"publish","type":"post","link":"https:\/\/prepbytes.com\/blog\/what-is-nested-structure-in-c\/","title":{"rendered":"What is Nested Structure in C"},"content":{"rendered":"

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Nested structures in the C programming language provide a powerful mechanism to organize and represent complex data. While a structure allows you to group related variables under a single name, nesting structures enables you to create more intricate and hierarchical data structures. This article delves into the concept of nested structures in C, exploring their syntax, advantages, and common use cases. Whether you’re a beginner or an experienced programmer, understanding nested structures can significantly enhance your ability to model real-world scenarios in your C programs.<\/p>\n

What is Structure in C Programming Language?<\/h2>\n

In C, The structure is a user-defined data type that is used to store a group of items of different data types as a single data type. Each element of a structure is known as its member.<\/p>\n

Syntax of Structure in C<\/h3>\n

The syntax of structure in C language:<\/p>\n

    struct struct_Name\n{\n    \/\/ Members of the structure \n            int studentId;\n        float marks;\n};<\/code><\/pre>\n
Suppose we have an entity \u2018Student\u2019, and we need the name and student id of each student. Instead of storing all the names and ids of each student in some array or vector, we can create a structure ‘Student’ in the following manner:<\/p>\n
Example of Structure in C<\/h3>\n
A simple example of structure in C language is discussed below:<\/p>\n
struct Student\n{\n                char name[30];\n                int studentId;\n};<\/code><\/pre>\n
Now, We have a brief understanding of Structure in C.<\/p>\n
What is Nested Structure in C?<\/h2>\n
In C, a structure is defined using the struct keyword, followed by the structure name, and then the structure members enclosed within curly braces.<\/p>\n
Syntax of Nested Structure in C<\/h3>\n
Below is the syntax of nested structure in C language:<\/p>\n
struct outer_struct {\n   \/\/ outer structure members\n   int outer_member1;\n   float outer_member2;\n\n   \/\/ nested structure definition\n   struct inner_struct {\n      \/\/ inner structure members\n      int inner_member1;\n      float inner_member2;\n   } inner;\n};<\/code><\/pre>\n
Example of Nested Structure in C<\/h3>\n
struct school{\n   int numberOfStudents;\n   int numberOfTeachers;\n    struct student{\n        char name[50];\n        int class;\n        int roll_Number;\n    } std;\n};<\/code><\/pre>\n
Explanation:<\/strong>
\nIn the above example of nested structure in C, there are two structures Student (depended structure)<\/strong> and another structure called School(Outer structure)<\/strong>. The structure School has the data members like numberOfStudents, numberOfTeachers, etc. and the Student structure is nested inside the structure School and it has the data members like name, class, roll_Number, etc.<\/p>\n
To access the members of the school structure, you use dot notation. For example, to access the numberOfStudents member of the school structure, you would use the following syntax:<\/p>\n
struct school s;\ns.numberOfStudents = 100;<\/code><\/pre>\n
To access the members of the nested student structure, you would use the following syntax:<\/p>\n
strcpy(s.std.name, \"John Smith\");\ns.std.class = 10;\ns.std.roll_Number = 1;<\/code><\/pre>\n
Note that the dot notation is used to access the members of the std structure, which is a member of the school structure.
\nThe nested structure student contains three members: name, class, and roll_Number. This structure can be useful in situations where you need to store information about a student, such as their name, class, and roll number.<\/p>\n
Ways in Which a Structure Can Be Nested<\/h3>\n
The structure can be nested in the following different ways:<\/p>\n
    \n
  1. By Separate Nested Structure<\/strong><\/li>\n
  2. By Embedded Nested Structure.<\/strong><\/li>\n<\/ol>\n
      \n
    • \n
      By Separate Nested Structure:<\/strong> In this method, the two structures are created, but the dependent structure(Employee) should be used inside the main structure(Organisation) as a member. For a better understanding let’s see an example of separate nested structure in c language.<\/p>\n
      C Program implemented by Separate Nested Structure<\/strong><\/p>\n\t\t\t\t\t\t