| .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| .\" |
| .\" Permission is granted to make and distribute verbatim copies of this |
| .\" manual provided the copyright notice and this permission notice are |
| .\" preserved on all copies. |
| .\" |
| .\" Permission is granted to copy and distribute modified versions of this |
| .\" manual under the conditions for verbatim copying, provided that the |
| .\" entire resulting derived work is distributed under the terms of a |
| .\" permission notice identical to this one. |
| .\" |
| .\" Since the Linux kernel and libraries are constantly changing, this |
| .\" manual page may be incorrect or out-of-date. The author(s) assume no |
| .\" responsibility for errors or omissions, or for damages resulting from |
| .\" the use of the information contained herein. The author(s) may not |
| .\" have taken the same level of care in the production of this manual, |
| .\" which is licensed free of charge, as they might when working |
| .\" professionally. |
| .\" |
| .\" Formatted or processed versions of this manual, if unaccompanied by |
| .\" the source, must acknowledge the copyright and authors of this work. |
| .\" |
| .\" References consulted: |
| .\" Linux libc source code |
| .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) |
| .\" 386BSD man pages |
| .\" |
| .\" Modified 1993-03-29, David Metcalfe |
| .\" Modified 1993-07-24, Rik Faith (faith@cs.unc.edu) |
| .\" Modified 2002-08-10, 2003-11-01 Walter Harms, aeb |
| .\" |
| .TH DIV 3 2003-11-01 "" "Linux Programmer's Manual" |
| .SH NAME |
| div, ldiv, lldiv, imaxdiv \- compute quotient and remainder of an integer division |
| .SH SYNOPSIS |
| .nf |
| .B #include <stdlib.h> |
| .sp |
| .BI "div_t div(int " numerator ", int " denominator ); |
| .br |
| .BI "ldiv_t ldiv(long " numerator ", long " denominator ); |
| .br |
| .BI "lldiv_t lldiv(long long " numerator ", long long " denominator ); |
| .sp |
| .B #include <inttypes.h> |
| .sp |
| .BI "imaxdiv_t imaxdiv(intmax_t " numerator ", intmax_t " denominator ); |
| .fi |
| .SH DESCRIPTION |
| The \fBdiv\fP() function computes the value \fInumerator\fP/\fIdenominator\fP and |
| returns the quotient and remainder in a structure named \fIdiv_t\fP that contains |
| two integer members (in unspecified order) named \fIquot\fP and \fIrem\fP. |
| The quotient is rounded towards zero. |
| The result satisfies \fIquot\fP*\fIdenominator\fP+\fIrem\fP = \fInumerator\fP. |
| .LP |
| The \fBldiv\fP() and \fBlldiv\fP() and \fBimaxdiv\fP() functions do the same, |
| dividing numbers of the indicated type and returning the result in a structure |
| of the indicated name, in all cases with fields \fIquot\fP and \fIrem\fP |
| of the same type as the function arguments. |
| .SH "RETURN VALUE" |
| The \fIdiv_t\fP (etc.) structure. |
| .SH EXAMPLE |
| After |
| .nf |
| div_t q = div(\-5, 3); |
| .fi |
| the values \fIq.quot\fP and \fIq.rem\fP are \-1 and \-2, respectively. |
| .SH "CONFORMING TO" |
| SVID 3, 4.3BSD, ISO 9899. |
| The functions |
| .BR lldiv () |
| and |
| .BR imaxdiv () |
| were added in ISO C99. |
| .SH "SEE ALSO" |
| .BR abs (3), |
| .BR remainder (3) |