Pointers in c++ || Code with abuzar

Pointers in C++

Pointers is also a data type which is used the address int type . C++ is very easy to Learn and Fun  , Some C++ tasks are to performed more easily with pointers and other C++ tasks , such as dynamic memory allocation , cannot  be perform without them .

As we know that every variable is a memory location and every memory location has it's address define which can not be accessed using ampersand (&) operator which denotes an address in memory consider the following which will pint the addresses of the variable defined --

Syntax :

datatpe*var_name   ( Variable name)

int* ptr      // ptr points to the address which holds the  int data .

Example :

#include <iostreame>

using namespace std; 

int main (){

// Variable Declare 

int a=10;  

 //  Treat as a Pointer 

int* b;     

 // b assign the address of a 

b=&a;     

Cout<<"Address of int data"<<&b<<endl; 

Cout<<"Value of int data"<<*b<<endl; 

Return 0;

}

Output :

 Address of int Data :  a0x61ff08

Value of Int Data : 10

What are Pointers ? 

A pointer is a variable whose value is the address of another variable . Like any Variable or constant , you must declare a pointer before you can work with it .

when you Create a variable in your C++ program , It is assigned some space the computer memory . The value of this variable is stored in the assigned location . to know the location in the computer memory where the data is stored in C++  provides the &(Reference) operator  The operator returns the address that a variable occupies.

Reference operators(&) and Deference Operator (*)

 The reference operator (&) return the variable address.

 The deference operator(*) helps us to get the value which is stored in memory address


For Example : 

 If you have a variable given the name num , stored in the address 0x234 and storing the value 28 .

 The reference operator (&) will return 0x234

The Deference operator (*) will return 5 .

Why Use Pointers in C/C++ 

Pointers can be used to pass of arrays and strings to function more efficiently . Pointers save the memory . Pointers reduce the length and Complexity of the Program . Pointers make possible to return more than one value from the function .

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