.fi
.SH DESCRIPTION
The
-.B clock()
+.BR clock ()
function returns an approximation of processor time used by the program.
.SH "RETURN VALUE"
The value returned is the CPU time used so far as a
.SH NOTES
The C standard allows for arbitrary values at the start of the program;
subtract the value returned from a call to
-.B clock()
+.BR clock ()
at the start of the program to get maximum portability.
.PP
Note that the time can wrap around. On a 32bit system where
.\" POSIX 1003.1-2001 doesn't explicitly allow this, nor is there an
.\" explicit prohibition. -- MTK
The
-.B times()
+.BR times ()
function, which explicitly returns (separate) information about the
caller and its children, may be preferable.
.SH "SEE ALSO"