Course Content

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

Accessing Struct Fields

After we have created a structure to describe a chemical element, we can finally interact with it.

In order to access the information contained in the structure, we must use the . operator.

The . operator allows us to access the elements (fields) of the structure directly.

This way we get access to a member of the structure.

Let's try to display information about silicon on the screen:

main


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#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
};

int main()
{
	struct chemicalElement silicon = { "Si", 14, 4, 28.08 };

	printf("Name: %s\n", silicon.name); 
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
Pointers are also widely used to access structure fields, but we'll cover that later.

If you used the second method of creating a struct-variable, you need to use the srtcopy() function to output silicon.name.

main


              123456789101112131415161718192021222324
            
#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
} silicon;

int main()
{
	strcpy(silicon.name,"Si"); // using `strcpy()`
	silicon.atomicNumber = 14;
	silicon.valency = 4;
	silicon.mass = 28.08;

	printf("Name: %s\n", silicon.name);
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
The strcpy() function is used to copy the specified (“Si”) string to the name[3] field of the created variable.

Task

Display the valence of natrium;
Display the atomic mass of aluminum;
Display the atomic number of zinc.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 1. Chapter 5

Accessing Struct Fields

After we have created a structure to describe a chemical element, we can finally interact with it.

In order to access the information contained in the structure, we must use the . operator.

The . operator allows us to access the elements (fields) of the structure directly.

This way we get access to a member of the structure.

Let's try to display information about silicon on the screen:

main


              123456789101112131415161718192021
            
#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
};

int main()
{
	struct chemicalElement silicon = { "Si", 14, 4, 28.08 };

	printf("Name: %s\n", silicon.name); 
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
Pointers are also widely used to access structure fields, but we'll cover that later.

If you used the second method of creating a struct-variable, you need to use the srtcopy() function to output silicon.name.

main


              123456789101112131415161718192021222324
            
#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
} silicon;

int main()
{
	strcpy(silicon.name,"Si"); // using `strcpy()`
	silicon.atomicNumber = 14;
	silicon.valency = 4;
	silicon.mass = 28.08;

	printf("Name: %s\n", silicon.name);
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
The strcpy() function is used to copy the specified (“Si”) string to the name[3] field of the created variable.

Task

Display the valence of natrium;
Display the atomic mass of aluminum;
Display the atomic number of zinc.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 1. Chapter 5

Accessing Struct Fields

After we have created a structure to describe a chemical element, we can finally interact with it.

In order to access the information contained in the structure, we must use the . operator.

The . operator allows us to access the elements (fields) of the structure directly.

This way we get access to a member of the structure.

Let's try to display information about silicon on the screen:

main


              123456789101112131415161718192021
            
#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
};

int main()
{
	struct chemicalElement silicon = { "Si", 14, 4, 28.08 };

	printf("Name: %s\n", silicon.name); 
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
Pointers are also widely used to access structure fields, but we'll cover that later.

If you used the second method of creating a struct-variable, you need to use the srtcopy() function to output silicon.name.

main


              123456789101112131415161718192021222324
            
#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
} silicon;

int main()
{
	strcpy(silicon.name,"Si"); // using `strcpy()`
	silicon.atomicNumber = 14;
	silicon.valency = 4;
	silicon.mass = 28.08;

	printf("Name: %s\n", silicon.name);
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
The strcpy() function is used to copy the specified (“Si”) string to the name[3] field of the created variable.

Task

Display the valence of natrium;
Display the atomic mass of aluminum;
Display the atomic number of zinc.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

After we have created a structure to describe a chemical element, we can finally interact with it.

In order to access the information contained in the structure, we must use the . operator.

The . operator allows us to access the elements (fields) of the structure directly.

This way we get access to a member of the structure.

Let's try to display information about silicon on the screen:

main


              123456789101112131415161718192021
            
#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
};

int main()
{
	struct chemicalElement silicon = { "Si", 14, 4, 28.08 };

	printf("Name: %s\n", silicon.name); 
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
Pointers are also widely used to access structure fields, but we'll cover that later.

If you used the second method of creating a struct-variable, you need to use the srtcopy() function to output silicon.name.

main


              123456789101112131415161718192021222324
            
#include "stdio.h"

struct chemicalElement
{
	char name[3];
	int atomicNumber;
	int valency;
	double mass;
} silicon;

int main()
{
	strcpy(silicon.name,"Si"); // using `strcpy()`
	silicon.atomicNumber = 14;
	silicon.valency = 4;
	silicon.mass = 28.08;

	printf("Name: %s\n", silicon.name);
	printf("Atomic Number: %d\n", silicon.atomicNumber);
	printf("Valency: %d\n", silicon.valency);
	printf("Mass: %f", silicon.mass);

	return 0;
}

Note
The strcpy() function is used to copy the specified (“Si”) string to the name[3] field of the created variable.

Task

Display the valence of natrium;
Display the atomic mass of aluminum;
Display the atomic number of zinc.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 1. Chapter 5

Switch to desktop for real-world practiceContinue from where you are using one of the options below