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.

main.cpp


              12345678
            
#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.cpp


              12345678
            
#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.cpp


              1234567
            
#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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Avsnitt 2. Kapitel 3

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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.

main.cpp


              12345678
            
#include <iostream>

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

main.cpp


              12345678
            
#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;
}

main.cpp


              1234567
            
#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

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 3