int8 uint8 Difference

Pecific Integral type Limits

specifier	Common equivalent	Signing	Bits	Bytes	Minimum Value	Maximum Value
int8_t	Signed Char	Signed	8	1	−128	127
uint8_t	unsigned char	Unsigned	8	1	0	255
int16_t	Short	Signed	16	2	−32,768	32,767
uint16_t	unsigned short	Unsigned	16	2	0	65,535
int32_t	Int	Signed	32	4	−2,147,483,648	2,147,483,647
uint32_t	unsigned int	Unsigned	32	4	0	4,294,967,295
int64_t	Long Long	Signed	64	8	−9,223,372,036,854,775,808	9,223,372,036,854,775,807
uint64_t	unsigned long long	Unsigned	64	8	0	18,446,744,073,709,551,615

There are some platform-independent data types, because long occupies a different number of bytes in 32-bit machines and 64-bit machines, so it is recommended to use the above type: The header file of the above type is stdint.h