stdint.h

int8_t 8-bit signed interger

int16_t 16-bit signed interger

int32_t 32-bit signed interger

int64_t 64-bit signed interger

uint8_t 8-bit unsigned interger

uint16_t 16-bit unsigned interger

uint32_t 32-bit unsigned interger

uint64_t 64-bit unsigned interger