如何使用int16_t或int32_t与scanf函数

Question

我理解int16_t或int32_t在C中的方式是它们在您的计算机上分别被键入16位和32位数字。我相信你会使用这些，当你需要保证一个数字是16或32位，因为不同的系统并不总是代表一个int 32位或short 16位（这个假设是否正确？我找到混合的答案，当我在网上）。

我的问题是我怎么会用像scanf的功能从用户获取输入与int16_t或int32_t或任何其他typedef操作数类型的，当我要求他们实际上是16位或32位或什么？是否有某种特殊的字符串修饰符？通常情况下，如果我想从用户的int，而无需关心它是如何大的其实是代表我会写这样的事情

scanf("%d", &int); 

如果我通过在int32_t，但这个工作我认为这仅仅是因为一个我的系统上的int是32位，它并没有专门给我一个32位数字，而只是给我一个int。如何获取保证为32位的数字？我看过this page of string modifiers和其他一些地方，但没有发现这些typedefed数字类型。

编辑：既然收到我的问题的答案，我已经做了一些谷歌搜索，发现this。我将它列入下面以供参考。

uppercase hexadecimal printf format for uintptr_t 

#define SCNd16 "d" 
decimal scanf format for int16_t 

#define SCNd32 "ld" 
decimal scanf format for int32_t 

#define SCNd8 "hhd" 
decimal scanf format for int8_t 

#define SCNdFAST16 "d" 
decimal scanf format for int_fast16_t 

#define SCNdFAST32 "ld" 
decimal scanf format for int_fast32_t 

#define SCNdFAST8 "hhd" 
decimal scanf format for int_fast8_t 

#define SCNdLEAST16 "d" 
decimal scanf format for int_least16_t 

#define SCNdLEAST32 "ld" 
decimal scanf format for int_least32_t 

#define SCNdLEAST8 "hhd" 
decimal scanf format for int_least8_t 

#define SCNdPTR SCNd16 
decimal scanf format for intptr_t 

#define SCNi16 "i" 
generic-integer scanf format for int16_t 

#define SCNi32 "li" 
generic-integer scanf format for int32_t 

#define SCNi8 "hhi" 
generic-integer scanf format for int8_t 

#define SCNiFAST16 "i" 
generic-integer scanf format for int_fast16_t 

#define SCNiFAST32 "li" 
generic-integer scanf format for int_fast32_t 

#define SCNiFAST8 "hhi" 
generic-integer scanf format for int_fast8_t 

#define SCNiLEAST16 "i" 
generic-integer scanf format for int_least16_t 

#define SCNiLEAST32 "li" 
generic-integer scanf format for int_least32_t 

#define SCNiLEAST8 "hhi" 
generic-integer scanf format for int_least8_t 

#define SCNiPTR SCNi16 
generic-integer scanf format for intptr_t 

#define SCNo16 "o" 
octal scanf format for uint16_t 

#define SCNo32 "lo" 
octal scanf format for uint32_t 

#define SCNo8 "hho" 
octal scanf format for uint8_t 

#define SCNoFAST16 "o" 
octal scanf format for uint_fast16_t 

#define SCNoFAST32 "lo" 
octal scanf format for uint_fast32_t 

#define SCNoFAST8 "hho" 
octal scanf format for uint_fast8_t 

#define SCNoLEAST16 "o" 
octal scanf format for uint_least16_t 

#define SCNoLEAST32 "lo" 
octal scanf format for uint_least32_t 

#define SCNoLEAST8 "hho" 
octal scanf format for uint_least8_t 

#define SCNoPTR SCNo16 
octal scanf format for uintptr_t 

#define SCNu16 "u" 
decimal scanf format for uint16_t 

#define SCNu32 "lu" 
decimal scanf format for uint32_t 

#define SCNu8 "hhu" 
decimal scanf format for uint8_t 

#define SCNuFAST16 "u" 
decimal scanf format for uint_fast16_t 

#define SCNuFAST32 "lu" 
decimal scanf format for uint_fast32_t 

#define SCNuFAST8 "hhu" 
decimal scanf format for uint_fast8_t 

#define SCNuLEAST16 "u" 
decimal scanf format for uint_least16_t 

#define SCNuLEAST32 "lu" 
decimal scanf format for uint_least32_t 

#define SCNuLEAST8 "hhu" 
decimal scanf format for uint_least8_t 

#define SCNuPTR SCNu16 
decimal scanf format for uintptr_t 

#define SCNx16 "x" 
hexadecimal scanf format for uint16_t 

#define SCNx32 "lx" 
hexadecimal scanf format for uint32_t 

#define SCNx8 "hhx" 
hexadecimal scanf format for uint8_t 

#define SCNxFAST16 "x" 
hexadecimal scanf format for uint_fast16_t 

#define SCNxFAST32 "lx" 
hexadecimal scanf format for uint_fast32_t 

#define SCNxFAST8 "hhx" 
hexadecimal scanf format for uint_fast8_t 

#define SCNxLEAST16 "x" 
hexadecimal scanf format for uint_least16_t 

#define SCNxLEAST32 "lx" 
hexadecimal scanf format for uint_least32_t 

#define SCNxLEAST8 "hhx" 
hexadecimal scanf format for uint_least8_t 

#define SCNxPTR SCNx16 
hexadecimal scanf format for uintptr_t 

Answer 1

对于那些需要从inttypes.h如SCNd64或SCNu32等

scanf("%" SCNd32, &x);