unsigned char uint8_t

typedef unsigned char uint8_t; //无符号8位数

typedef signed char int8_t; //有符号8位数

typedef unsigned int uint16_t; //无符号16位数

typedef signed int int16_t; //有符号16位数

typedef unsigned long uint32_t; //无符号32位数

typedef signed long int32_t; //有符号32位数

typedef float float32; //单精度浮点数

typedef double float64; //双精度浮点数