Pointer in C++

C++ provides full support for pointers, including pointer arithmetic, double pointers and function pointers. Below is the implementation of pointers in C++:

C++

#include <iostream>
using namespace std;

void geeks()
{
    int var = 10;

    // declare pointer variable
    int* ptr;

    // note that data type of ptr and var must be same
    ptr = &var;

    // assign the address of a variable to a pointer
    cout << "Value at ptr = " << ptr << endl;
    cout << "Value at var = " << var << endl;
    cout << "Value at *ptr =" <<  *ptr << endl;
}

// Driver program
int main()
{
    geeks();
    return 0;
}

Output

Value at ptr = 0x7fff078bd004
Value at var = 10
Value at *ptr =10

Pointer in programming

Pointer is a variable that stores the memory address of another variable. Pointers are a powerful feature of many programming languages, including C, C++, and others. They provide a way to simulate call-by-reference, create complex data structures, and interact with the operating system.

Pointer in C++

Pointer in programming

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