// CONSTANT_StaticVsDynamic.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <iostream>
using namespace std;
const int const_var2=2; //GLOABAL const variable=>"static storage"in ROM
int _tmain(int argc, _TCHAR* argv[])
{
const int const_var=1; // LOCAL const variable=>dynamic storage on stack.
//what if add "static" qualifier?
int *ptr1=const_cast<int*>(&const_var); // <==> (int*)&const_var;
printf("const_var = %d\n",const_var);
printf("*ptr1= %d\n",*ptr1);
*ptr1=3; // However, if "static"=> static storage =>runtime error
printf("now *ptr1= %d\n",*ptr1); //can change value via ptr after const_cast
// const_var=1; //compile error
int *ptr2=const_cast<int*>(&const_var2); // <==> (int*)&const_var2;
printf("const_var2 = %d\n",const_var2);
printf("*ptr2= %d\n",*ptr2);
*ptr2=4; //runtime access error ocurres!!
printf("now *ptr2= %d\n",*ptr2);
while(1);
return 0;
}