flmin.3f

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 3F 代码 · 共 56 行

.\" SCCSID: @(#)flmin.3f	8.1	9/11/90
.TH flmin 3f VAX "" Unsupported
.SH Name
flmin, flmax, ffrac, dflmin, dflmax, dffrac, inmax \- return extreme values
.SH Syntax
.B function flmin()
.sp 1
.B function flmax()
.sp 1
.B function ffrac()
.sp 1
.B double precision function dflmin()
.sp 1
.B double precision function dflmax()
.sp 1
.B double precision function dffrac()
.sp 1
.B function inmax()
.SH Description
.NXR "flmin subroutine (FORTRAN)"
.NXR "flmax subroutine (FORTRAN)"
.NXR "ffrac subroutine (FORTRAN)"
.NXR "dflmin subroutine (FORTRAN)"
.NXR "dflmax subroutine (FORTRAN)"
.NXR "dffrac subroutine (FORTRAN)"
.NXR "inmax subroutine (FORTRAN)"
.NXR "floating point arithmetic"
.NXAM "arithmetic" "floating point arithmetic"
Functions
.PN flmin
and
.PN flmax
return the minimum and maximum positive floating point values respectively.
Functions
.PN dflmin
and
.PN dflmax
return the minimum and maximum positive double precision floating point values.
Function
.PN inmax
returns the maximum positive integer value.
.PP
The functions
.PN ffrac
and
.PN dffrac
return the fractional accuracy of single and double precision
floating point numbers respectively.
These are the smallest numbers that can be added to 1.0 without being lost.
.PP
These functions can be used by programs that must scale algorithms
to the numerical range of the processor.
.SH Files
.ie \nM /usr/ucb/lib/libF77.a
.el /usr/lib/libF77.a