C语言中的数据类型

char		2^7=128
unsigned char		2^8=256
short	短整数 2个字节 16个比特	2^15=32768	-32768~32767
unsigned short		2^16=65536	0~65535
long	长整数 4个字节	2^31=2147483647
unsigned long		2^32=4.2949673e9
int	4个字节

int :有符号

uint:无符号

  1 /*********************************************************************************************************
  2   工程代码定义格式*********************************************************************************************************/
  3 typedef unsigned char BOOLEAN;                                   
  4 typedef unsigned char  INT8U;                      
  5 typedef unsigned char  uint8;    /*后面的数字指的是变量所占的比特*/
  6 
  7 typedef signed   char INT8S;
  8 typedef signed   char  int8;
  9 
 10 typedef unsigned short INT16U;                                       
 11 typedef unsigned short uint16;
 12 
 13 typedef signed   short INT16S;                                      
 14 typedef signed   short int16;
 15 
 16 typedef unsigned long  INT32U;             /*  */
 17 typedef unsigned long uint32;
 18 
 19 typedef signed   long  INT32S;                                    
 20 typedef signed   long  int32;
 21 
 22 typedef float          FP32;                                       
 23 typedef double         FP64;                                       
 24