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Oppiskele Introduction to Pointer | Pointers Fundamentals
C++ Pointers and References

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Introduction to Pointer

A pointer is a variable that stores the memory address of another variable. It allows direct manipulation of memory. Declaration and initialization of a pointer looks like this:

h

pointer

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int* p_Name = nullptr;
  • int: specifies the base type of the variable that the pointer will point to. In this case, it's an integer;

  • *: called dereference operator, returns the value stored at the address held by a pointer;

  • p_Name: the name of the pointer variable. You can choose any valid variable name;

  • nullptr: is a keyword that represents a null pointer, indicating that it is empty and doesn't point to anything.

Note

Commonly, pointers are named with a prefix p_ as a naming convention signifying that the variable is a pointer.

Tehtävä

Swipe to start coding

  1. Declare and initialize pointer with a nullptr.
  2. Display a pointer for a chosen primitive data type.
  3. Make sure its name has p_ prefix.

Ratkaisu

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solution

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book
Introduction to Pointer

A pointer is a variable that stores the memory address of another variable. It allows direct manipulation of memory. Declaration and initialization of a pointer looks like this:

h

pointer

copy
1
int* p_Name = nullptr;
  • int: specifies the base type of the variable that the pointer will point to. In this case, it's an integer;

  • *: called dereference operator, returns the value stored at the address held by a pointer;

  • p_Name: the name of the pointer variable. You can choose any valid variable name;

  • nullptr: is a keyword that represents a null pointer, indicating that it is empty and doesn't point to anything.

Note

Commonly, pointers are named with a prefix p_ as a naming convention signifying that the variable is a pointer.

Tehtävä

Swipe to start coding

  1. Declare and initialize pointer with a nullptr.
  2. Display a pointer for a chosen primitive data type.
  3. Make sure its name has p_ prefix.

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!

close

Awesome!

Completion rate improved to 5.88

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