// console3_5.cpp
// consts, ptr, const ptrs, ptrs to const...
// How much wood would a wood chuck chuck if a wood chuck could chuck wood?

#include <iostream.h>

int z = 0xFFFF;

int main( int argc, char *argv[] )
{
    cout << "Consts and Pointers" << endl;

    int a = 0xAAAA;            // 'a' is an integer
    int *b = &a;               // 'b' is a ptr to an integer
    const int c = 0xC;         // 'c' is an integer constant
    int * const d = &a;        // 'd' is a const ptr to an int
    const int * e = &a;        // 'e' is a ptr to an integer constant
    const int * const f = &a;  // 'f' is a const ptr to an integer constant

    cout << hex;

    // const int c = 0xC;
    //c = 0xD;    // ERROR!

    // int * const d = &a;
    cout << "Before, *d = 0x" << *d << endl;
    *d = *d + 1;  // OK because where it points is constant
    cout << "After, *d = 0x" << *d << endl;
    //d = &z; // ERROR, cuz where we point is constant, not what we point at

    // const int * e = &a;
    //*e = *e + 1;  // ERROR, What it points to is constant, 
                    // not where it points
    cout << "Before, *e = 0x" << *e << endl;
    e = &z; // Where it points is NOT constant!
    cout << "After, *e = 0x" << *e << endl;

    // const int * const f = &a;
    // *f = *f + 1; // ERROR, can't change what it points to!
    // f = &z; // ERROR, can't change where it points either!
    // f is an alias to a Read Only Memory location!
    cout << "ROM, *f = 0x" << *f << endl;

    return 0;
}