| INTTYPES(3) | Library Functions Manual | INTTYPES(3) |
inttypes —
#include <inttypes.h>
<inttypes.h> header
describes a set of format specifier macros aimed to increase portability both
within and across operating systems. It includes the
<stdint.h> header and extends
it with additional facilities.
Each of the following macros expand to a character string literal containing the format specifier suitable for use within the format argument of a formatted I/O function such as printf(3). Each macro contains an identifier (PRI or SCN), a conversion specifier, and a possible length modifier.
The length modifier follows the integer types described in stdint(3):
| int8_t | uint8_t |
| int16_t | uint16_t |
| int32_t | uint32_t |
| int64_t | uint64_t |
| int_least8_t | uint_least8_t |
| int_least16_t | uint_least16_t |
| int_least32_t | uint_least32_t |
| int_least64_t | uint_least64_t |
| int_fast8_t | uint_fast8_t |
| int_fast16_t | uint_fast16_t |
| int_fast32_t | uint_fast32_t |
| int_fast64_t | uint_fast64_t |
| intmax_t | uintmax_t |
| intptr_t | uintptr_t |
The following format specifiers are defined for the fprintf(3) and fscanf(3) families, respectively:
The available conversion specifiers, “?” in above, are d and i for signed integers and o, u, x, and X for unsigned integers. The X is not available for the fscanf(3) family. Without the length modifier these would correspond with %d, %i, %o, %u, %x, and %X, respectively.
uint64_t i = 123;
...
(void)printf("i = %"PRIu64"\n", i);
<inttypes.h> header conforms
to ISO/IEC 9899:1999 (“ISO C99”)
and IEEE Std 1003.1-2001 (“POSIX.1”).
<inttypes.h> header was
first introduced in NetBSD 1.6.
| March 21, 2010 | NetBSD 9.3 |