lec27_doublepointer.cpp

//Playing with double pointers
/*
#include <iostream>
using namespace std;

void update(int **p)
{
    //p=p+1;
    //kuch change hoga ? --NO

    //*p=*p+1;
    //kuch change hoga ?--YES

    //**p=**p+1;
    //kuch change hoga ?
}
int main()
{
    int i = 5;
    int *p = &i;
    int **p2 = &p;

    cout << endl
         << "Everything is fine." << endl
         << endl;

    cout << "Address of p : " << &p << endl;

    cout << "Printing i : " << i << endl;
    cout << "Printing *p : " << *p << endl;
    cout << "Printing **p2 : " << **p2 << endl;
    
    cout << endl;
    
    cout << "Printing p : " << p << endl;
    cout << "Printing *p2 : " << *p2 << endl;

    cout << endl;
   cout << endl;
    cout <<"Before "<< i << endl;
    cout <<"Before "<< p << endl;
    cout <<"Before "<< p2 << endl;
    cout << endl;
    update(p2);
    cout <<"After "<< i << endl;
    cout <<"After "<< p << endl;
    cout <<"After "<< p2 << endl;
    cout << endl;
    

    return 0;
}*/