数据类型表（DELPHI、C++）

delphi整型数据表

Integer	-2147483648..2147483647	signed	32-bit
Cardinal	0..4294967295	unsigned	32-bit
Shortint	-128..127	signed	8-bit
Smallint	-32768..32767	signed	16-bit
Longint	-2147483648..2147483647	signed	32-bit
Int64	-2^63..2^63?	signed	64-bit
Byte	0..255	unsigned	8-bit
Word	0..65535	unsigned	16-bit
Longword	0..4294967295	unsigned	32-bit

C++

char	-128 到 127 或者 0 到 255		1 个字节
unsigned char	0 到 255		1 个字节
signed char	-128 到 127		1 个字节
int	-2147483648 到 2147483647		4 个字节
unsigned int	0 到 4294967295		4 个字节
signed int	-2147483648 到 2147483647		4 个字节
short int	-32768 到 32767		2 个字节
unsigned short int	0 到 65,535		2 个字节
signed short int	-32768 到 32767		2 个字节
long int	-9,223,372,036,854,775,808 到 9,223,372,036,854,775,807		8 个字节
signed long int	-9,223,372,036,854,775,808 到 9,223,372,036,854,775,807		8 个字节
unsigned long int	0 to 18,446,744,073,709,551,615		8 个字节
float	+/- 3.4e +/- 38 (~7 个数字)		4 个字节
double	+/- 1.7e +/- 308 (~15 个数字)		8 个字节
long double	+/- 1.7e +/- 308 (~15 个数字)		16 个字节
wchar_t	2 或 4 个字节		1 个宽字符

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