키워드는 변수의 이름으로 사용이 불가능함

asm	auto	bool
break	case	catch
char	class	const
const_cast	continue	default
delete	do	double
dynamic_cast	else	enum
explicit	export	extern
false	float	for
friend	goto	if
inline	nt	long
mutable	namespace	new
operator	private	protected
public	register	reinterpret_cast
return	short	signed
sizeof	static	static_cast
struct	switch	template
this	throw	true
try	typedef	typeid
typename	union	unsigned
using	virtual	void
volatile	wchar_t	while