13.cpp

#include <iostream>

using namespace std;

int main()
{
    // What is a pointer? ----> Data type which holds the address of other data types

    int a = 3;
    int *b = &a; // & ---> (Address of) Operator
                 // * ---> (value at) Dereference operator
    // int *b;
    // b = &a;

    cout << "The value of a is " << a << endl;
    cout << "The address of a is " << &a << endl;
    cout << "The value of b is " << b << endl;
    cout << "The value at address b is " << *b << endl;

    // Pointer to pointer
    int **c = &b;
    cout << "The address of b is " << &b << endl;
    cout << "The value of c is " << c << endl;
    cout << "The value at address c is " << *c << endl;
    cout << "The value at address value_at(value_at(c)) is " << **c << endl;

    return 0;
}