C++ Keywords

The C + + Keywords must be in your information because you can not use them as variable name.

C++ Keywords List

You can’t use below mentioned keyword as identifier in your C++ programs.

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

In addition, the following words are also reserved

And	bitor	not_eq	xor
and_eq	compl	or	xor_eq
bitand	not	or_eq

You should also try to avoid using names from the C++ library, e.g. swap, max.