[C++]const_cast

형을 변환 시켜주는 것이 아니라

 const, 참조를 제거한다.

char str[] = "BitCoin";

const char* ptr = str;

cout << " before : " << str << endl;    (before : BitCoin)

//str[0] = 'b'; //error

char* remove_const = const_cast<char*>(ptr);

remove_const[0] = 'b';

cout << " after 0: " << str << endl;    (after 0 : bitCoin)

remove_const[0] = 'B';

cout << " after 1: " << str << endl;    (after 1 : BitCoin)

const int value = 10;

const int& ref = value;

int& ref2 = const_cast<int&>(ref);

ref2 = 20;

cout << "value(" << value << ") " << " ref(" << ref << ") " << " ref2(" << ref2 << ")" << endl;

Value(10)  ref(20)  ref2(20)