C++ Pointers and References

C++ Pointers and References

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1. Pointers Fundamentals

Learn the basics of pointers in a simple, not overwhelming manner!

Introduction to Pointer

Assigning Addresses to Pointers

Link Between Pointer and Variable

Pointers Use Cases

2. Pointer Arithmetic

Explore how pointers, which store memory addresses, can be manipulated using arithmetic operations. Learn to navigate through memory locations, access data structures efficiently, and optimize code for performance.

Introduction to Pointer Arithmetic

Pointer Arithmetic Practice

Arrays and Pointers Connection

Array Pointer Arithmetic Practice

3. References Fundamentals

Explore the concept of references as aliases for variables and memory-efficient access to data. Learn how references contribute to cleaner code, improved readability, and enhanced performance by avoiding unnecessary data duplication.

Introduction to References

Reference Use Cases

Rvalue and Lvalue References

Reference vs Pointers

4. Dynamic Memory Allocation

Uncover the principles and techniques behind allocating and deallocating memory dynamically during program execution. Understand the advantages and challenges of dynamic memory allocation.

Introduction to Memory

Dynamic Allocation

Dynamic Allocation of the Array

Pointer to Pointer Dynamic Allocation

Summary and Overview

Зміст курсу

C++ Pointers and References

C++ Pointers and References

1. Pointers Fundamentals

Introduction to Pointer Assigning Addresses to Pointers Link Between Pointer and Variable Pointers Use Cases

2. Pointer Arithmetic

Introduction to Pointer Arithmetic Pointer Arithmetic Practice Arrays and Pointers Connection Array Pointer Arithmetic Practice

3. References Fundamentals

Introduction to References Reference Use Cases Rvalue and Lvalue References Reference vs Pointers

4. Dynamic Memory Allocation

Introduction to Memory Dynamic Allocation Dynamic Allocation of the Array Pointer to Pointer Dynamic Allocation Summary and Overview

Arrays and Pointers Connection

Arrays and pointers are closely connected. The name of an array can be treated as a pointer to its first element. Look at the example below:

main


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#include <iostream>

int main()
{
	int arr[5] { 12, 21, 27, 10, 11 };
	// using dereference operator (*) to access the value
	std::cout << *(arr);
}

Arrays are typically formed by arranging elements in contiguous memory blocks, where each element is stored in consecutive memory locations. This enables the application of pointer arithmetic to access any element within the array.

main


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#include <iostream>

int main()
{
    float arr[5] { 2.7, 9.9, 1.0, 0.3, 2.2 };
    std::cout << arr[3] << std::endl;
 	std::cout << *(arr + 3) << std::endl;
}

In fact, the compiler automatically performs this operation. It translates array brackets into the dereference operator with pointer arithmetic with an array name. This implies that the order can be changed, allowing the index to be placed outside the brackets while the array name remains inside the brackets (index[array_name]).

main


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#include <iostream>

int main()
{
  float arr[5] { 2.7, 9.9, 1.0, 0.3, 2.2 };

 	std::cout << 3[arr] << std::endl;
}

Note

Stick to conventional syntax for clarity, this form may confuse unfamiliar readers

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