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Learn 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:

pointer.h

pointer.h

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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.

Task

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  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.

Solution

solution.cpp

solution.cpp

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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:

pointer.h

pointer.h

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.

Task

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.

Solution

solution.cpp

solution.cpp

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

close

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Completion rate improved to 5.88

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