Data Types in C++ (and VC++):

Name Bytes Description Range

char 1 Character or integer 8 bits length. signed: -128 to 127
unsigned: 0 to 255

short 2 Integer 16 bits length.
WORD = unsigned short. signed: -32768 to 32767
unsigned: 0 to 65535

long 4 Integer 32 bits length.
DWORD = unsigned long. signed:-2147483648 to 2147483647
unsigned: 0 to 4294967295

int * Integer. Its length traditionally depends on the length of the system's Word type, thus in MSDOS it is 16 bits long, whereas in 32 bit systems (like Windows 9x/2000/NT and systems that work under protected mode in x86 systems) it is 32 bits long (4 bytes). See short, long

float 4 Floating point number. 3.4e + / - 38 (7 digits)

double 8 Double precision floating point number. 1.7e + / - 308 (15 digits)

long double 10 Long double precision floating point number. 1.2e + / - 4932 (19 digits)

bool 1 Boolean value. It can take one of two values: true or false
NB: Not all compilers (old ones) support bool. true or false

wchar_t 2 Wide character. It is designed as a type to store international characters of a two-byte character set. NOTE: this is a type recently added by the ANSI-C++ standard. Not all compilers support it. wide characters

Other Stuff

sizeof(variable) returns the size in bytes of a variable. See msdn for more.

Name	Bytes	Description	Range
char	1	Character or integer 8 bits length.	signed: -128 to 127 unsigned: 0 to 255
short	2	Integer 16 bits length. WORD = unsigned short.	signed: -32768 to 32767 unsigned: 0 to 65535
long	4	Integer 32 bits length. DWORD = unsigned long.	signed:-2147483648 to 2147483647 unsigned: 0 to 4294967295
int	*	Integer. Its length traditionally depends on the length of the system's Word type, thus in MSDOS it is 16 bits long, whereas in 32 bit systems (like Windows 9x/2000/NT and systems that work under protected mode in x86 systems) it is 32 bits long (4 bytes).	See short, long
float	4	Floating point number.	3.4e + / - 38 (7 digits)
double	8	Double precision floating point number.	1.7e + / - 308 (15 digits)
long double	10	Long double precision floating point number.	1.2e + / - 4932 (19 digits)
bool	1	Boolean value. It can take one of two values: `true` or `false` NB: Not all compilers (old ones) support bool.	`true` or `false`
wchar_t	2	Wide character. It is designed as a type to store international characters of a two-byte character set. NOTE: this is a type recently added by the ANSI-C++ standard. Not all compilers support it.	wide characters