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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

Arrays with Structs

Creating an array from structures is no different from creating an array with other data types.

Accessing the elements of such an array is similar to that of ordinary arrays by indexes.

As an example, let's create an array of structures that will store information about a person.

main


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#include <stdio.h>
#include <string.h> // for the strcpy function

// structure definition
struct Person {
    char name[50];
    int age;
    double height;
};

int main() {
    // declaring an array of structures
    struct Person people[3];

    // declaring an array of structures
    strcpy(people[0].name, "Alice");
    people[0].age = 25;
    people[0].height = 1.75;

    strcpy(people[1].name, "Bob");
    people[1].age = 30;
    people[1].height = 1.80;

    strcpy(people[2].name, "Charlie");
    people[2].age = 35;
    people[2].height = 1.70;

    // output information about people from the array
    for (int i = 0; i < 3; ++i) {
        printf("Person %d:\n", i + 1);
        printf("Name: %s\n", people[i].name);
        printf("Age: %d\n", people[i].age);
        printf("Height: %.2f\n", people[i].height);
        printf("\n");
    }

    return 0;
}

Завдання

Initialize a variable that will indicate the number of structures to be created;
Create a pointer variable and place in it the address of an allocated memory location for a given number of structures in the array.
Write code to autofill a dynamically created array with numbers from 0 to a number indicating the number of structures;
Display the fields of all created structures in an array;
Free allocated memory.

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Секція 3. Розділ 4

Arrays with Structs

Creating an array from structures is no different from creating an array with other data types.

Accessing the elements of such an array is similar to that of ordinary arrays by indexes.

As an example, let's create an array of structures that will store information about a person.

main


              1234567891011121314151617181920212223242526272829303132333435363738
            
#include <stdio.h>
#include <string.h> // for the strcpy function

// structure definition
struct Person {
    char name[50];
    int age;
    double height;
};

int main() {
    // declaring an array of structures
    struct Person people[3];

    // declaring an array of structures
    strcpy(people[0].name, "Alice");
    people[0].age = 25;
    people[0].height = 1.75;

    strcpy(people[1].name, "Bob");
    people[1].age = 30;
    people[1].height = 1.80;

    strcpy(people[2].name, "Charlie");
    people[2].age = 35;
    people[2].height = 1.70;

    // output information about people from the array
    for (int i = 0; i < 3; ++i) {
        printf("Person %d:\n", i + 1);
        printf("Name: %s\n", people[i].name);
        printf("Age: %d\n", people[i].age);
        printf("Height: %.2f\n", people[i].height);
        printf("\n");
    }

    return 0;
}

Завдання

Initialize a variable that will indicate the number of structures to be created;
Create a pointer variable and place in it the address of an allocated memory location for a given number of structures in the array.
Write code to autofill a dynamically created array with numbers from 0 to a number indicating the number of structures;
Display the fields of all created structures in an array;
Free allocated memory.

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 3. Розділ 4

Arrays with Structs

Creating an array from structures is no different from creating an array with other data types.

Accessing the elements of such an array is similar to that of ordinary arrays by indexes.

As an example, let's create an array of structures that will store information about a person.

main


              1234567891011121314151617181920212223242526272829303132333435363738
            
#include <stdio.h>
#include <string.h> // for the strcpy function

// structure definition
struct Person {
    char name[50];
    int age;
    double height;
};

int main() {
    // declaring an array of structures
    struct Person people[3];

    // declaring an array of structures
    strcpy(people[0].name, "Alice");
    people[0].age = 25;
    people[0].height = 1.75;

    strcpy(people[1].name, "Bob");
    people[1].age = 30;
    people[1].height = 1.80;

    strcpy(people[2].name, "Charlie");
    people[2].age = 35;
    people[2].height = 1.70;

    // output information about people from the array
    for (int i = 0; i < 3; ++i) {
        printf("Person %d:\n", i + 1);
        printf("Name: %s\n", people[i].name);
        printf("Age: %d\n", people[i].age);
        printf("Height: %.2f\n", people[i].height);
        printf("\n");
    }

    return 0;
}

Завдання

Initialize a variable that will indicate the number of structures to be created;
Create a pointer variable and place in it the address of an allocated memory location for a given number of structures in the array.
Write code to autofill a dynamically created array with numbers from 0 to a number indicating the number of structures;
Display the fields of all created structures in an array;
Free allocated memory.

Все було зрозуміло?

Дякуємо за ваш відгук!

Creating an array from structures is no different from creating an array with other data types.

Accessing the elements of such an array is similar to that of ordinary arrays by indexes.

As an example, let's create an array of structures that will store information about a person.

main


              1234567891011121314151617181920212223242526272829303132333435363738
            
#include <stdio.h>
#include <string.h> // for the strcpy function

// structure definition
struct Person {
    char name[50];
    int age;
    double height;
};

int main() {
    // declaring an array of structures
    struct Person people[3];

    // declaring an array of structures
    strcpy(people[0].name, "Alice");
    people[0].age = 25;
    people[0].height = 1.75;

    strcpy(people[1].name, "Bob");
    people[1].age = 30;
    people[1].height = 1.80;

    strcpy(people[2].name, "Charlie");
    people[2].age = 35;
    people[2].height = 1.70;

    // output information about people from the array
    for (int i = 0; i < 3; ++i) {
        printf("Person %d:\n", i + 1);
        printf("Name: %s\n", people[i].name);
        printf("Age: %d\n", people[i].age);
        printf("Height: %.2f\n", people[i].height);
        printf("\n");
    }

    return 0;
}

Завдання

Initialize a variable that will indicate the number of structures to be created;
Create a pointer variable and place in it the address of an allocated memory location for a given number of structures in the array.
Write code to autofill a dynamically created array with numbers from 0 to a number indicating the number of structures;
Display the fields of all created structures in an array;
Free allocated memory.

Секція 3. Розділ 4