Pointers in C++

How are Pointers used in C++?


Pointers refer the memory location of a variable using a reference operator. The reference operator is the "&" symbol, which means the "address of".

Pointers can be used to directly access the value stored in the variable using the "*" operator known as a "dereference operator".Another dereference operator is "->", which dereferences to a structure or union.

Example :

#include <iostream.h> int main ()
int value;
int * ptr;
ptr = &value;
*ptr = 12;
cout << "The value is:: " << value << endl;
return 0;

Result :

The value is:: 12

In the above example an integer "value" and a pointer "ptr" is declared first. The address of the variable "value" is pointed by the "ptr". Now the values of the "ptr" is assigned to 12.

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