C 语言printf打印各种数据类型的方法(u8/s8/u16/s16.../u64/double/float)(转)

首先必须知道u8,s8等数据类型的定义：

typedef signed char s8;  
typedef unsigned char u8;  
  
typedef signed short s16;  
typedef unsigned short u16;  
  
typedef signed int s32;  
typedef unsigned int u32;  
  
typedef signed long long s64;  
typedef unsigned long long u64;  

与体系结构相关的，定义在include/linux/type.h文件中：

/* bsd */
typedef unsigned char		u_char;
typedef unsigned short		u_short;
typedef unsigned int		u_int;
typedef unsigned long		u_long;

/* sysv */
typedef unsigned char		unchar;
typedef unsigned short		ushort;
typedef unsigned int		uint;
typedef unsigned long		ulong;

#ifndef __BIT_TYPES_DEFINED__
#define __BIT_TYPES_DEFINED__

typedef		__u8		u_int8_t;
typedef		__s8		int8_t;
typedef		__u16		u_int16_t;
typedef		__s16		int16_t;
typedef		__u32		u_int32_t;
typedef		__s32		int32_t;

#endif /* !(__BIT_TYPES_DEFINED__) */

typedef		__u8		uint8_t;
typedef		__u16		uint16_t;
typedef		__u32		uint32_t;

#if defined(__GNUC__)
typedef		__u64		uint64_t;
typedef		__u64		u_int64_t;
typedef		__s64		int64_t;

对于各种数据类型的打印方式总结如下如下：