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C++ Pointers and References

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Assigning Addresses to Pointers

When working with pointers, proper initialization is important to ensure they point to valid memory locations and prevent unexpected behavior.

Address-of and Dereference operators

To assign a value to the pointer we have to use address-of operator and to access the value of the memory address we have to use dereference operator.

  • &: the address-of operator, returns the memory address of its operand;

  • *: the derefence operator, returns the value that stored in the memory address.

cpp

main

copy

              
12345678

            
#include <iostream>

int main()
{
	int variable = 10;
	std::cout << &variable << std::endl;
	std::cout << *(&variable) << std::endl;
}

Using the address-of operator, we can assign these addresses to pointers, creating a direct link between the pointer and the memory location it points to.

Compito

Swipe to start coding

  1. Declare a pointer with an appropriate data type.
  2. Initialize it with a variable memory address.
  3. Output both the memory address the pointer points to and the value it holds.

Soluzione

cpp

solution

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Sezione 1. Capitolo 2
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book
Assigning Addresses to Pointers

When working with pointers, proper initialization is important to ensure they point to valid memory locations and prevent unexpected behavior.

Address-of and Dereference operators

To assign a value to the pointer we have to use address-of operator and to access the value of the memory address we have to use dereference operator.

  • &: the address-of operator, returns the memory address of its operand;

  • *: the derefence operator, returns the value that stored in the memory address.

cpp

main

copy

              
12345678

            
#include <iostream>

int main()
{
	int variable = 10;
	std::cout << &variable << std::endl;
	std::cout << *(&variable) << std::endl;
}

Using the address-of operator, we can assign these addresses to pointers, creating a direct link between the pointer and the memory location it points to.

Compito

Swipe to start coding

  1. Declare a pointer with an appropriate data type.
  2. Initialize it with a variable memory address.
  3. Output both the memory address the pointer points to and the value it holds.

Soluzione

cpp

solution

Switch to desktopCambia al desktop per esercitarti nel mondo realeContinua da dove ti trovi utilizzando una delle opzioni seguenti
Tutto è chiaro?

Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 1. Capitolo 2
Switch to desktopCambia al desktop per esercitarti nel mondo realeContinua da dove ti trovi utilizzando una delle opzioni seguenti
Siamo spiacenti che qualcosa sia andato storto. Cosa è successo?
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