'\" te
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.TH DIFFTIME 3C "Jul 24, 2002"
.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(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR ctime (3C),
.BR attributes (7),
.BR standards (7)