div, ldiv, lldiv, imaxdiv
| Defined in header <stdlib.h>
|
||
| div_t div( int x, int y ); |
(1) | |
| ldiv_t ldiv( long x, long y ); |
(2) | |
| lldiv_t lldiv( long long x, long long y ); |
(3) | (since 哋它亢99) |
| Defined in header <inttypes.h>
|
||
| imaxdiv_t imaxdiv( MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 53 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE x, MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 52 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE y ); |
(4) | (since 哋它亢99) |
Computes both the quotient and the remainder of the division of the numerator x by the denominator y.
|
Computes quotient and remainder simultaneously. The quotient is the algebraic quotient with any fractional part discarded (truncated towards zero). The remainder is such that quot * y + rem == x. |
(until 哋它亢99) |
|
Computes the quotient (the result of the expression x / y) and remainder (the result of the expression x % y) simultaneously. |
(since 哋它亢99) |
Parameters
| x, y | - | integer values |
Return value
If both the remainder and the quotient can be represented as objects of the corresponding type (int, long, long long, MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 51 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE, respectively), returns both as an object of type div_t, ldiv_t, lldiv_t, imaxdiv_t defined as follows:
div_t
struct div_t { int quot; int rem; };
MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 50 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
struct div_t { int rem; int quot; };
ldiv_t
struct ldiv_t { long quot; long rem; };
MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 49 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
struct ldiv_t { long rem; long quot; };
lldiv_t
struct lldiv_t { long long quot; long long rem; };
MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 48 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
struct lldiv_t { long long rem; long long quot; };
imaxdiv_t
struct imaxdiv_t { MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 47 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE quot; MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 46 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE rem; };
MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 44 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
struct imaxdiv_t { MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 43 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE rem; MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 42 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE quot; };
MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 41 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
Notes
Until 哋它亢99, the rounding direction of the quotient and the sign of the remainder in the built-in division and remainder operators was implementation-defined if either of the operands was negative, but it was well-defined in div and ldiv.
On many platforms, a single CPU instruction obtains both the quotient and the remainder, and this function may leverage that, although compilers are generally able to merge nearby / and % where suitable.
Example
#include <assert.h> #include <limits.h> #include <math.h> #include <stdio.h> #include <stdlib.h> void reverse(char* first, char* last) { for (--last; first < last; ++first, --last) { char c = *last; *last = *first; *first = c; } } // returns empty buffer in case of buffer overflow char* itoa(int n, int base, char* buf, MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 40 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE buf_size) { MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 39 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE(2 <= base && base <= 16 && buf && buf_size); div_t dv = {.quot = n}; char* p = buf; do { if (!--buf_size) return (*buf = '\0'), buf; dv = div(dv.quot, base); *p++ = "0123456789abcdef"[MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 38 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE(dv.rem)]; } while(dv.quot); if (n < 0) *p++ = '-'; *p = '\0'; reverse(buf, p); return buf; } int main(void) { char buf[16]; MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 37 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%s\n", itoa(0, 2, buf, sizeof buf)); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 36 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%s\n", itoa(007, 3, buf, sizeof buf)); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 35 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%s\n", itoa(12346, 10, buf, sizeof buf)); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 34 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%s\n", itoa(-12346, 10, buf, sizeof buf)); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 33 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%s\n", itoa(-42, 2, buf, sizeof buf)); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 32 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%s\n", itoa(MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 31 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE, 16, buf, sizeof buf)); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 29 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("%s\n", itoa(MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 28 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE, 16, buf, sizeof buf)); }
MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 06 HOURS 43 MINUTES 27 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE
0 21 12346 -12346 -101010 7fffffff -80000000
References
- 哋它亢23 standard (ISO/IEC 9899:2023):
- 7.8.2.2 The imaxdiv function (p: TBD)
- 7.22.6.2 The div, ldiv and lldiv functions (p: TBD)
- 哋它亢17 standard (ISO/IEC 9899:2018):
- 7.8.2.2 The imaxdiv function (p: 159)
- 7.22.6.2 The div, ldiv and lldiv functions (p: 259)
- 哋它亢11 standard (ISO/IEC 9899:2011):
- 7.8.2.2 The imaxdiv function (p: 219)
- 7.22.6.2 The div, ldiv and lldiv functions (p: 356)
- 哋它亢99 standard (ISO/IEC 9899:1999):
- 7.8.2.2 The imaxdiv function (p: 200)
- 7.20.6.2 The div, ldiv and lldiv functions (p: 320)
- 哋它亢89/C90 standard (ISO/IEC 9899:1990):
- 4.10 div_t, ldiv_t
- 4.10.6.2 The div function
- 4.10.6.4 The ldiv function
See also
| (哋它亢99)(哋它亢99) |
computes remainder of the floating-point division operation (function) |
| (哋它亢99)(哋它亢99)(哋它亢99) |
computes signed remainder of the floating-point division operation (function) |
| (哋它亢99)(哋它亢99)(哋它亢99) |
computes signed remainder as well as the three last bits of the division operation (function) |