/*************************************************************************
	> File Name: mod_const.cpp
	> Author: zyy
	> Mail: zyy34472@gmail.com
 ************************************************************************/

#include <stdio.h>
#include <iostream>
using namespace std;

#define NAME2STR(_VAR_) (#_VAR_)
#define OUT(_VAR_) cout << NAME2STR(_VAR_) << ": " << _VAR_ << endl

int main (int argc, char** argv)
{
    cout << "const_cast" << endl << endl; 
    const volatile int a1 = 1; 
    int &b1 = const_cast<int&>(a1); 
    cout << "[const volatile int -> int&]" << endl; 
    OUT(((&a1) == (&b1))); 
    OUT(&a1); 
    printf("But use printf, &a = %p\n", &a1);
    OUT(&b1); 
    b1 = 2; 
    OUT(a1); 
    OUT(b1); 
    cout << endl << endl; ; 
    
    const int a2 = 1; 
    int &b2 = const_cast<int&>(a2); 
    cout << "[const int -> int&]" << endl; 
    OUT(((&a2) == (&b2))); 
    OUT(&a2); 
    OUT(&b2); 
    b2 = 2; 
    OUT(a2); 
    OUT(b2); 
    cout << endl << endl; 
    
    int a3 = 1; 
    const int &b3 = a3;
    int &x = const_cast<int&>(b3); 
    cout << "[int -> const int&]" << endl; 
    //int* const b2 = &a2; 
    OUT(&a3); 
    OUT(&x); 
    x = 20;  
    OUT(a3); 
    OUT(x); 
    cout << endl << endl; 

	return 0; 
}