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
int* p_Name = nullptr;
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.
Завдання
Swipe to start coding
- Declare and initialize pointer with a
nullptr. - Display a pointer for a chosen primitive data type.
- Make sure its name has
p_prefix.
Рішення
solution
#include <iostream>
int main()
{
float* p_Variable = nullptr;
std::cout << p_Variable;
}
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Секція 1. Розділ 1
#include <iostream>
int main()
{
___ _ ___ = ___;
std::cout << ___;
}
