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.TH DIFFTIME 3
.SH NAME
difftime - calculate time difference
.SH SYNOPSIS
#include <time.h>

double difftime(time_t time1, time_t time0)
.SH DESCRIPTION
The
.BR difftime ()
function returns the difference (time1 - time0)
between time
.I time1
and time
.IR time0 .
.SH RETURN VALUE
The value returned is the number of seconds elapsed,
represented as a double.
.SH STANDARDS
ISO/IEC 9899:1999 Section 7.23.2.2 Paragraph 1,2,3
.SH SEE ALSO
.BR time.h (3)