'\" t .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" .\" 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 2023-03-30 "Linux man-pages 6.04" .SH NAME div, ldiv, lldiv, imaxdiv \- compute quotient and remainder of an integer division .SH LIBRARY Standard C library .RI ( libc ", " \-lc ) .SH SYNOPSIS .nf .B #include .PP .BI "div_t div(int " numerator ", int " denominator ); .BI "ldiv_t ldiv(long " numerator ", long " denominator ); .BI "lldiv_t lldiv(long long " numerator ", long long " denominator ); .PP .B #include .PP .BI "imaxdiv_t imaxdiv(intmax_t " numerator ", intmax_t " denominator ); .fi .PP .RS -4 Feature Test Macro Requirements for glibc (see .BR feature_test_macros (7)): .RE .PP .BR lldiv (): .nf _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L .fi .SH DESCRIPTION The .BR div () 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 toward zero. The result satisfies \fIquot\fP*\fIdenominator\fP+\fIrem\fP = \fInumerator\fP. .PP The .BR ldiv (), .BR lldiv (), and .BR imaxdiv () 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 ATTRIBUTES For an explanation of the terms used in this section, see .BR attributes (7). .ad l .nh .TS allbox; lbx lb lb l l l. Interface Attribute Value T{ .BR div (), .BR ldiv (), .BR lldiv (), .BR imaxdiv () T} Thread safety MT-Safe .TE .hy .ad .sp 1 .SH STANDARDS C11, POSIX.1-2008. .SH HISTORY POSIX.1-2001, C89, C99, SVr4, 4.3BSD. .PP .BR lldiv () and .BR imaxdiv () were added in C99. .SH EXAMPLES After .PP .in +4n .EX div_t q = div(\-5, 3); .EE .in .PP the values \fIq.quot\fP and \fIq.rem\fP are \-1 and \-2, respectively. .SH SEE ALSO .BR abs (3), .BR remainder (3)