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.

    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);  

The structure can be nested in the following ways:

Here, we create two structures, but the dependent structure should be used inside the main structure as a member. Consider the following example.

As you can see, doj (date of joining) is the variable of type Date. Here doj is used as a member of the Employee structure. In this way, we can use the Date structure in many structures.

The embedded structure enables us to declare the structure inside the structure. Hence, it requires fewer lines of codes but it can not be used in multiple data structures. Consider the following example.

Below are the different examples of nested structure in C:

Example 1 – Initialization of nested structures:

Initialization of nested structures is possible at the time of declaration.

With this blog post we will discuss all types of nested structures in C, along with a brief description and some examples.

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nested structure

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Overview of nested structures in C: their types and examples

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