C++数据类型速查

Type Name	Bytes	Other Names	Range of Values
int	4	signed	–2,147,483,648 to 2,147,483,647
__int8	1	char, signed char	–128 to 127
__int16	2	short, short int, signed short int	–32,768 to 32,767
__int32	4	signed, signed int, int	–2,147,483,648 to 2,147,483,647
__int64	8	long long, signed long long	–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
bool	1	none	false or true
char	1	none	–128 to 127
short	2	short int, signed short int	–32,768 to 32,767
long	4	long int, signed long int	–2,147,483,648 to 2,147,483,647
long long	8	none (but equivalent to __int64)	–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
enum	4	none	Same as int
float	4	none	3.4E +/- 38 (7 digits)
double	8	none	1.7E +/- 308 (15 digits)
long double	same as double	none	same as double
wchar_t	2	__wchar_t	0 to 65,535