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C++ Pointers and References
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C++ Pointers and References

C++ Pointers and References

1. Pointers Fundamentals
Introduction to PointerAssigning Addresses to PointersLink Between Pointer and VariablePointers Use Cases
2. Pointer Arithmetic
Introduction to Pointer ArithmeticPointer Arithmetic PracticeArrays and Pointers ConnectionArray Pointer Arithmetic Practice
3. References Fundamentals
Introduction to ReferencesReference Use CasesRvalue and Lvalue ReferencesReference vs Pointers
4. Dynamic Memory Allocation
Introduction to MemoryDynamic AllocationDynamic Allocation of the ArrayPointer to Pointer Dynamic AllocationSummary and Overview

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.

Tehtävä

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.

Ratkaisu

cpp

solution

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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.

Tehtävä

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.

Ratkaisu

cpp

solution

Switch to desktopVaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoista
Oliko kaikki selvää?

Miten voimme parantaa sitä?

Kiitos palautteestasi!

Osio 1. Luku 2
Switch to desktopVaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoista
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