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C Structs

1. Introduction to Structs

What are Structs Structs Application Defining and Declaring Structs Creating Your First Struct Accessing Struct Fields

2. Pointers and Structs

Pointers Brief Overview Pointers to Structs Pointers Inside Structs Dynamically Allocating Structs Passing Structs to the Functions

3. Structs and Memory

Understanding Memory Layout of Structs Alignment and Padding in Structs Unions Arrays with Structs

4. Advanced Structs Usage

Nested Structs Struct with Arrays and Other Structs Anonymous Struct and Union Complex Data Structure

5. Implementing Data Structures

Introduction to Linked List Basic Concept and Structure Building a Linked List Travesting and Displaying Linked List Completion Overview

Nested Structs

In addition to the basic primitive data types such as int or char, arrays and pointers, you can use other structures as members within your structure.

Several methods can be used:

Declare and define the NestedStruct structure inside the OuterStruct structure (embedded nested struct);

Declare the NestedStruct structure separately from the OuterStruct structure, create an instance of the NestedStruct structure inside the OuterStruct structure (separate nested struct).

The difference is that when a nested structure is declared separately, that structure can be used in many other structures.

If an instance of a nested structure was created outside of an external structure, then the structure will not be nested.

You can access the fields of a nested structure directly through the "." operator or through a pointer and the -> operator.

An example of using nested structures:

main


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#include <stdio.h>

// structure for address
struct Address {
    char street[50];
    char city[50];
    char index[10];
};

// structure for person
struct Person {
    char name[50];
    int age;
    struct Address address; // nested structure
};

int main() {
    // initialization of Person structure
    struct Person person = { "Sherlock Holmes", 27, {"Baker Street", "London", "221B"} };

    // display information about the person and his address
    printf("Name: %s\n", person.name);
    printf("Age: %d\n", person.age);
    printf("Address: %s, %s, %s\n", person.address.index, person.address.street, person.address.city);

    return 0;
}

Завдання

Define a nested structure education;
Create an instance of the Student structure;
Display the student's name and age;
Display information about the student’s education.

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Секція 4. Розділ 1

Nested Structs

In addition to the basic primitive data types such as int or char, arrays and pointers, you can use other structures as members within your structure.

Several methods can be used:

Declare and define the NestedStruct structure inside the OuterStruct structure (embedded nested struct);

Declare the NestedStruct structure separately from the OuterStruct structure, create an instance of the NestedStruct structure inside the OuterStruct structure (separate nested struct).

The difference is that when a nested structure is declared separately, that structure can be used in many other structures.

If an instance of a nested structure was created outside of an external structure, then the structure will not be nested.

You can access the fields of a nested structure directly through the "." operator or through a pointer and the -> operator.

An example of using nested structures:

main


              123456789101112131415161718192021222324252627
            
#include <stdio.h>

// structure for address
struct Address {
    char street[50];
    char city[50];
    char index[10];
};

// structure for person
struct Person {
    char name[50];
    int age;
    struct Address address; // nested structure
};

int main() {
    // initialization of Person structure
    struct Person person = { "Sherlock Holmes", 27, {"Baker Street", "London", "221B"} };

    // display information about the person and his address
    printf("Name: %s\n", person.name);
    printf("Age: %d\n", person.age);
    printf("Address: %s, %s, %s\n", person.address.index, person.address.street, person.address.city);

    return 0;
}

Завдання

Define a nested structure education;
Create an instance of the Student structure;
Display the student's name and age;
Display information about the student’s education.

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 4. Розділ 1

Nested Structs

In addition to the basic primitive data types such as int or char, arrays and pointers, you can use other structures as members within your structure.

Several methods can be used:

Declare and define the NestedStruct structure inside the OuterStruct structure (embedded nested struct);

Declare the NestedStruct structure separately from the OuterStruct structure, create an instance of the NestedStruct structure inside the OuterStruct structure (separate nested struct).

The difference is that when a nested structure is declared separately, that structure can be used in many other structures.

If an instance of a nested structure was created outside of an external structure, then the structure will not be nested.

You can access the fields of a nested structure directly through the "." operator or through a pointer and the -> operator.

An example of using nested structures:

main


              123456789101112131415161718192021222324252627
            
#include <stdio.h>

// structure for address
struct Address {
    char street[50];
    char city[50];
    char index[10];
};

// structure for person
struct Person {
    char name[50];
    int age;
    struct Address address; // nested structure
};

int main() {
    // initialization of Person structure
    struct Person person = { "Sherlock Holmes", 27, {"Baker Street", "London", "221B"} };

    // display information about the person and his address
    printf("Name: %s\n", person.name);
    printf("Age: %d\n", person.age);
    printf("Address: %s, %s, %s\n", person.address.index, person.address.street, person.address.city);

    return 0;
}

Завдання

Define a nested structure education;
Create an instance of the Student structure;
Display the student's name and age;
Display information about the student’s education.

Все було зрозуміло?

Дякуємо за ваш відгук!

In addition to the basic primitive data types such as int or char, arrays and pointers, you can use other structures as members within your structure.

Several methods can be used:

Declare and define the NestedStruct structure inside the OuterStruct structure (embedded nested struct);

Declare the NestedStruct structure separately from the OuterStruct structure, create an instance of the NestedStruct structure inside the OuterStruct structure (separate nested struct).

The difference is that when a nested structure is declared separately, that structure can be used in many other structures.

If an instance of a nested structure was created outside of an external structure, then the structure will not be nested.

You can access the fields of a nested structure directly through the "." operator or through a pointer and the -> operator.

An example of using nested structures:

main


              123456789101112131415161718192021222324252627
            
#include <stdio.h>

// structure for address
struct Address {
    char street[50];
    char city[50];
    char index[10];
};

// structure for person
struct Person {
    char name[50];
    int age;
    struct Address address; // nested structure
};

int main() {
    // initialization of Person structure
    struct Person person = { "Sherlock Holmes", 27, {"Baker Street", "London", "221B"} };

    // display information about the person and his address
    printf("Name: %s\n", person.name);
    printf("Age: %d\n", person.age);
    printf("Address: %s, %s, %s\n", person.address.index, person.address.street, person.address.city);

    return 0;
}

Завдання

Define a nested structure education;
Create an instance of the Student structure;
Display the student's name and age;
Display information about the student’s education.

Секція 4. Розділ 1