Int long bytes

 

The Int type is special. The specific number of bytes is related to the machine length and compiler. To ensure portability, use _ int16 _ int32 _ int64, or use your own typedef int int32.

The C and C ++ standards only specify the minimum number of bytes of a certain type (to prevent overflow)

64-bit indicates that the data width of the general-purpose CPU register is 64-bit.

Data Type name	Bytes	Alias	Value Range
Int	*	Signed, signed int	Determined by the operating system, that is, it depends on the operating system's "font"
Unsigned int	*	Unsigned	Determined by the operating system, that is, it depends on the operating system's "font"
_ 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	-2,147,483,648 to 2,147,483,647
_ Int64	8	None	-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
Bool	1	None	False or true
Char	1	Signed Char	-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
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	4	Unsigned long int	0 to 4,294,967,295
Enum	*	None	Determined by the operating system, that is, it depends on the operating system's "font"
Float	4	None	3.4e +/-38 (7 digits)
Double	8	None	1.7e +/-308 (15 digits)
Long double	8	None	1.7e +/-308 (15 digits)
Wchar_t	2	_ Wchar_t	0 to 65,535

Type identifier	Type description	Length (Bytes)	Range	Remarks
Char	Character Type	1	-128 ~ 127	-27 ~ (27-1)
Unsigned char	Unsigned character type	1	0 ~ 255	0 ~ (28-1)
Short int	Short integer	2	-32768 ~ 32767	2-15 ~ (215-1)
Unsigned short int	Unentered short integer	2	0 ~ 65535	0 ~ (216-1)
Int	Integer	4	-2147483648 ~ 2147483647	-231 ~ (231-1)
Unsigned int	Unsigned integer	4	0 ~ 4294967295	0 ~ (232-1)
Float	Solid (single precision)	4	1.18*10-38 ~ 3.40*1038	7-bit valid bits
Double	Real (Double Precision)	8	2.23X10-308 ~ 1.79*10308	15-bit valid digits
Long double	Solid (long dual-precision)	10	3.37X10-4932 ~ 1.18*104932	19-bit valid digits