#include <iostream>
#include <string>

using std::cout;
using std::endl;
using std::string;

/* Note: Generally, having global variables is a bad design.  They're used here
   to be visible in printValues (without have to pass them in each time) */
int number = -1;
int* intPtr1;
int* intPtr2;

void printValues(string header){
    cout << endl;
    cout << header << endl;
    cout << "---------------------------------\n"; 
    cout << "&number:  " << &number << ",  number:  " << number << endl;
     
    cout << "&intPtr1: " << &intPtr1 << ",  intPtr1: " << intPtr1 << ",  *intPtr1: ";
    if( intPtr1 != nullptr){
        cout << *intPtr1;
    }else{
        cout << "nullptr";
    }
    cout << endl;
     
    cout << "&intPtr2: " << &intPtr2 << ",  intPtr2: " << intPtr2 << ",  *intPtr2: ";
    if( intPtr2 != nullptr){
        cout << *intPtr2;
    }else{
        cout << "nullptr";
    }
    cout << endl;
}

int main(){

    printValues("Initial");

    printValues("1) After making intPtr1 point to number\n");

    printValues("2) After assigning 3 to the variable that intPtr1 is pointing to (using intPtr1)\n");

    printValues("3) After making intPtr1 point to a newly allocated int\n");

    printValues("4) After assigning that new int to 7\n");

    printValues("5) After copying the address stored in intPtr1 to intPtr2\n");

    printValues("6) After making intPtr2 point to a newly allocated int\n");

    printValues("7) After assigning that new int to 1\n");

    printValues("8) After freeing up the allocated memory and set both pointers to NULL\n");
     
    return 0;
}