The macros in following table expand to character string literals and can be used with
the scanf family of functions when reading in unsigned integer
values.
| Macro Name | Description | Value |
|---|---|---|
SCNo8 |
Octal placeholder string for an unsigned 8-bit integer type. | "hho" |
SCNo16 |
Octal placeholder string for an unsigned 16-bit integer type. | "ho" |
SCNo32 |
Octal placeholder string for an unsigned 32-bit integer type. | "lo" |
SCNo64 |
Octal placeholder string for an unsigned 64-bit integer type, where supported. | "llo" |
SCNu8 |
Unsigned placeholder string for an unsigned 8-bit integer type. | "hhu" |
SCNu16 |
Unsigned placeholder string for an unsigned 16-bit integer type. | "hu" |
SCNu32 |
Unsigned placeholder string for an unsigned 32-bit integer type. | "lu" |
SCNu64 |
Unsigned placeholder string for an unsigned 64-bit integer type, where supported. | "llu" |
SCNx8 |
Hexadecimal placeholder string for an unsigned 8-bit integer type. | "hhx" |
SCNx16 |
Hexadecimal placeholder string for an unsigned 16-bit integer type. | "hx" |
SCNx32 |
Hexadecimal placeholder string for an unsigned 32-bit integer type. | "lx" |
SCNx64 |
Hexadecimal placeholder string for an unsigned 64-bit integer type, where supported. | "llx" |
SCNoFAST8 |
Octal placeholder string for the fastest signed integer type with a width of at least 8. | "hho" |
SCNoFAST16 |
Octal placeholder string for the fastest signed integer type with a width of at least 16. | "ho" |
SCNoFAST32 |
Octal placeholder string for the fastest signed integer type with a width of at least 32. | "lo" |
SCNoFAST64 |
Octal placeholder string for the fastest signed integer type with a width of at least 64, where supported. | "llo" |
SCNuFAST8 |
Unsigned placeholder string for the fastest signed integer type with a width of at least 8 bits. | "hhu" |
SCNuFAST16 |
Unsigned placeholder string for the fastest signed integer type with a width of at least 16. | "hu" |
SCNuFAST32 |
Unsigned placeholder string for the fastest signed integer type with a width of at least 32. | "lu" |
SCNuFAST64 |
Unsigned placeholder string for the fastest signed integer type with a width of at least 64, where supported. | "llu" |
SCNxFAST8 |
Hexadecimal placeholder string for the fastest signed integer type with a width of at least 8. | "hhx" |
SCNxFAST16 |
Hexadecimal placeholder string for the fastest signed integer type with a width of at least 16. | "hx" |
SCNxFAST32 |
Hexadecimal placeholder string for the fastest signed integer type with a width of at least 32. | "lx" |
SCNxFAST64 |
Octal placeholder string for the fastest signed integer type with a width of at least 64, where supported. | "llx" |
SCNoLEAST8 |
Octal placeholder string for a signed integer type with a width of at least 8 bits. | "hho" |
SCNoLEAST16 |
Octal placeholder string for a signed integer type with a width of at least 16 bits. | "ho" |
SCNoLEAST32 |
Octal placeholder string for a signed integer type with a width of at least 32 bits. | "lo" |
SCNoLEAST64 |
Octal placeholder string for a signed integer type with a width of at least 64 bits, where supported. | "llo" |
SCNuLEAST8 |
Unsigned placeholder string for a signed integer type with a width of at least 8 bits. | "hhu" |
SCNuLEAST16 |
Unsigned placeholder string for a signed integer type with a width of at least 16 bits. | "hu" |
SCNuLEAST32 |
Unsigned placeholder string for a signed integer type with a width of at least 32 bits. | "lu" |
SCNuLEAST64 |
Unsigned placeholder string for a signed integer type with a width of at least 64 bits, where supported. | "llu" |
SCNoMAX |
Octal placeholder string for a signed integer type with maximum width. | "llo"where 64-bit
integers are supported; "lo" otherwise |
SCNuMAX |
Unsigned placeholder string for a signed integer type with maximum width. | "llu"where 64-bit
integers are supported; "lu" otherwise |
SCNxMAX/SCNXMAX |
Hexadecimal placeholder string for a signed integer type with maximum width. | "llx"/"llX" where 64-bit integers
are supported; "lx"/"lX"
otherwise |
SCNoPTR |
Octal placeholder string for
uintptr_t. |
"lo" |
SCNuPTR |
Unsigned placeholder string for
uintptr_t. |
"lu" |
SCNxPTR/SCNXPTR |
Hexadecimal placeholder string for
uintptr_t. |
"lx"/"lX" |