//  This program illustrates pointers (i.e. variables for memory addresses)
//
#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
    float *pt_x = 0;  // Good practice to always initialize pointers to NULL
    float x = 3.14F;
    
    cout << "The value of x is " << x << "\n";
    cout << "The address of x is " << &x << "\n\n";
    
    pt_x = &x;
    
    cout << "The address of x is " << pt_x << "\n";
    cout << "The value of x is " << *pt_x << "\n\n";
    
    *pt_x = *pt_x + x + *pt_x;  // Notice that *pt_x happens before the addition
    
    cout << "The value of x is " << *pt_x << "\n\n";
    
    cout << "\n\n"; system( "PAUSE" );
    return( EXIT_SUCCESS );
}