inttypes.h

typedef unsigned char   uint8_t;     
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