C++ types

Type Name Bytes Other Names Range of Values
int
4
signed
–2,147,483,648 to 2,147,483,647

unsigned int
4
unsigned
0 to 4,294,967,295

__int8
1
char
–128 to 127

unsigned __int8
1
unsigned char
0 to 255

__int16
2
short, short int, signed short int
–32,768 to 32,767

unsigned __int16
2
unsigned short, unsigned short int
0 to 65,535

__int32
4
signed, signed int, int
–2,147,483,648 to 2,147,483,647

unsigned __int32
4
unsigned, unsigned int
0 to 4,294,967,295

__int64
8
long long, signed long long
–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

unsigned __int64
8
unsigned long long
0 to 18,446,744,073,709,551,615

bool
1
none
false or true

char
1
none
–128 to 127 by default

0 to 255 when compiled with /J

signed char
1
none
–128 to 127

unsigned char
1
none
0 to 255

short
2
short int, signed short int
–32,768 to 32,767

unsigned short
2
unsigned short int
0 to 65,535

long
4
long int, signed long int
–2,147,483,648 to 2,147,483,647

unsigned long
4
unsigned long int
0 to 4,294,967,295

long long
8
none (but equivalent to __int64)
–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

unsigned long long
8
none (but equivalent to unsigned __int64)
0 to 18,446,744,073,709,551,615

enum
varies
none
See Remarks.

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