'\" te
.\"  Copyright 1989 AT&T  Copyright (c) 2002, Sun Microsystems, Inc.  All Rights Reserved
.TH difftime 3C "24 Jul 2002" "SunOS 5.11" "Standard C Library Functions"
.SH NAME
difftime \- computes the difference between two calendar times
.SH SYNOPSIS
.LP
.nf
#include <time.h>

\fBdouble\fR \fBdifftime\fR(\fBtime_t\fR \fItime1\fR, \fBtime_t\fR \fItime0\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBdifftime()\fR function computes the difference between two  calendar times.
.SH RETURN VALUES
.sp
.LP
The \fBdifftime()\fR functions returns the difference \fI(time1-time0)\fR expressed in seconds as a \fBdouble\fR.
.SH USAGE
.sp
.LP
The \fBdifftime()\fR function is provided because there are no general arithmetic properties defined for type \fBtime_t\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
_
StandardSee \fBstandards\fR(5).
.TE

.SH SEE ALSO
.sp
.LP
\fBctime\fR(3C), \fBattributes\fR(5), \fBstandards\fR(5)