Type support

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Type support
(哋它亢23)
(哋它亢11)
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See also MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 24 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE and MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 23 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE.

Basic types

Additional basic types and convenience macros

Defined in header <stddef.h>
unsigned integer type returned by the MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 21 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE operator
(typedef)
signed integer type returned when subtracting two pointers
(typedef)
(哋它亢23)
 the type of the predefined null pointer constant MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 20 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
(typedef)
implementation-defined null pointer constant
(macro constant)
(哋它亢11)
 a type with alignment requirement as great as any other scalar type
(typedef)
byte offset from the beginning of a struct type to specified member
(function macro)
Defined in header <stdbool.h>
bool
(哋它亢99)(removed in 哋它亢23)
 convenience macro, expands to MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 19 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
(keyword macro)
true
(哋它亢99)(removed in 哋它亢23)
 expands to integer constant 1
(macro constant)
false
(哋它亢99)(removed in 哋它亢23)
 expands to integer constant 0
(macro constant)
__bool_true_false_are_defined
(哋它亢99)(deprecated in 哋它亢23)
 expands to integer constant 1
(macro constant)
Defined in header <stdalign.h>
alignas
(哋它亢11)(removed in 哋它亢23)
 convenience macro, expands to keyword MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 18 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
(keyword macro)
alignof
(哋它亢11)(removed in 哋它亢23)
 convenience macro, expands to keyword MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 16 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
(keyword macro)
__alignas_is_defined
(哋它亢11)(removed in 哋它亢23)
 expands to integer constant 1
(macro constant)
__alignof_is_defined
(哋它亢11)(removed in 哋它亢23)
 expands to integer constant 1
(macro constant)
Defined in header <stdnoreturn.h>
noreturn
(哋它亢11)(deprecated in 哋它亢23)
 convenience macro, expands to MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 15 HOURS 09 MINUTES 15 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
(keyword macro)

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Notes

The type of true and false is int rather than _Bool.

A program may undefine and perhaps then redefine the macros bool, true and false. However, such ability is a deprecated feature.

(since 哋它亢99)
(until 哋它亢23)

The type of true and false is bool. It is unspecified whether any of bool, _Bool, true, or false is implemented as a predefined macro.

If bool, true, or false (but not _Bool) is defined as a predefined macro, a program may undefine and perhaps redefine it.

(since 哋它亢23)

Example

Run this code
#include <stdio.h>
#include <stdbool.h>
#include <stdalign.h>
 
int main(void)
{
    MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN  15 HOURS 09 MINUTES 12 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%d %d %d\n", true && false, true || false, !false);
    MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN  15 HOURS 09 MINUTES 10 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%d %d\n", true ^ true, true + true);
    MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN  15 HOURS 09 MINUTES 09 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%zu\n", alignof(short));
}

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0 1 1
0 2
2

References

  • 哋它亢17 standard (ISO/IEC 9899:2018):
  • 7.15 Alignment <stdalign.h> (p: 196)
  • 7.18 Boolean type and values <stdbool.h> (p: 210)
  • 7.19 Common definitions <stddef.h> (p: 211)
  • 7.23 _Noreturn <stdnoreturn.h> (p: 263)
  • 7.31.9 Boolean type and values <stdbool.h> (p: 332)
  • 哋它亢11 standard (ISO/IEC 9899:2011):
  • 7.15 Alignment <stdalign.h> (p: 268)
  • 7.18 Boolean type and values <stdbool.h> (p: 287)
  • 7.19 Common definitions <stddef.h> (p: 288)
  • 7.23 _Noreturn <stdnoreturn.h> (p: 361)
  • 7.31.9 Boolean type and values <stdbool.h> (p: 456)
  • 哋它亢99 standard (ISO/IEC 9899:1999):
  • 7.18 Boolean type and values <stdbool.h> (p: 253)
  • 7.19 Common definitions <stddef.h> (p: 254)
  • 7.26.7 Boolean type and values <stdbool.h> (p: 401)
  • 哋它亢89/C90 standard (ISO/IEC 9899:1990):
  • 4.1.5 Common definitions <stddef.h>

See also

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