Contenido del Curso
C++ Pointers and References
C++ Pointers and References
Pointer to Pointer Dynamic Allocation
A pointer to pointer, denoted as double pointer (**).
This is a pointer that holds the memory address of another pointer. In simple words, it is a variable whose value is the address of another pointer. This concept might sound complex at first, but it provides a powerful mechanism for dealing with advanced dynamic memory allocation.
Syntax
main
#include <iostream> int main() { int x = 10; int *ptr1 = &x; int **ptr2 = &ptr1; // Accessing values using double pointer std::cout << "Location of ptr2: " << ptr2 << std::endl; std::cout << "Location of ptr1: " << *ptr2 << std::endl; std::cout << "Value of x: " << **ptr2 << std::endl; }
- ptr1: is a pointer to an integer (
int*); - ptr2: is a double pointer to an integer (
int**).
Dynamic Allocation of a Two-Dimensional Array
If you want to create a two-dimensional array dynamically (at runtime) you have to use a pointer to a pointer for the rows.
And then initialize each row with dynamic array (like in previous chapter)
Swipe to show code editor
- Dynamically allocate a two dimensional array.
- Dynamically allocate the arrays as elements.
- Free all allocated memory.
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
Pointer to Pointer Dynamic Allocation
A pointer to pointer, denoted as double pointer (**).
This is a pointer that holds the memory address of another pointer. In simple words, it is a variable whose value is the address of another pointer. This concept might sound complex at first, but it provides a powerful mechanism for dealing with advanced dynamic memory allocation.
Syntax
main
#include <iostream> int main() { int x = 10; int *ptr1 = &x; int **ptr2 = &ptr1; // Accessing values using double pointer std::cout << "Location of ptr2: " << ptr2 << std::endl; std::cout << "Location of ptr1: " << *ptr2 << std::endl; std::cout << "Value of x: " << **ptr2 << std::endl; }
- ptr1: is a pointer to an integer (
int*); - ptr2: is a double pointer to an integer (
int**).
Dynamic Allocation of a Two-Dimensional Array
If you want to create a two-dimensional array dynamically (at runtime) you have to use a pointer to a pointer for the rows.
And then initialize each row with dynamic array (like in previous chapter)
Swipe to show code editor
- Dynamically allocate a two dimensional array.
- Dynamically allocate the arrays as elements.
- Free all allocated memory.
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones