106 lines
3.5 KiB
Groff
106 lines
3.5 KiB
Groff
.\" $NetBSD: arithmetic.6,v 1.12 2009/03/11 13:00:37 joerg Exp $
|
|
.\"
|
|
.\" Copyright (c) 1989, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" Eamonn McManus of Trinity College Dublin.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)arithmetic.6 8.1 (Berkeley) 5/31/93
|
|
.\"
|
|
.Dd May 31, 1993
|
|
.Dt ARITHMETIC 6
|
|
.Os
|
|
.Sh NAME
|
|
.Nm arithmetic
|
|
.Nd quiz on simple arithmetic
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl o Ar +\-x/
|
|
.Op Fl r Ar range
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
asks you to solve problems in simple arithmetic.
|
|
Each question must be answered correctly before going on to the next.
|
|
After every 20 problems, it prints the score so far and the time taken.
|
|
You can quit at any time by typing the interrupt or end-of-file character.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width indent
|
|
.It Fl o
|
|
By default,
|
|
.Nm
|
|
asks questions on addition of numbers from 0 to 10, and corresponding
|
|
subtraction.
|
|
By supplying one or more of the characters
|
|
.Ar +\-x/ ,
|
|
you can ask for problems in addition, subtraction, multiplication, and
|
|
division, respectively.
|
|
If you give one of these characters more than once, that kind of problem
|
|
will be asked correspondingly more often.
|
|
.It Fl r
|
|
If a
|
|
.Ar range
|
|
is supplied,
|
|
.Nm
|
|
selects the numbers in its problems in the following way.
|
|
For addition and multiplication, the numbers to be added or multiplied
|
|
are between 0 and
|
|
.Ar range ,
|
|
inclusive.
|
|
For subtraction and division, both the required result and the number to
|
|
divide by or subtract will be between 0 and
|
|
.Ar range .
|
|
(Of course,
|
|
.Nm
|
|
will not ask you to divide by 0.)
|
|
The default
|
|
.Ar range
|
|
is 10.
|
|
.El
|
|
.Pp
|
|
When you get a problem wrong,
|
|
.Nm
|
|
will remember the numbers involved, and will tend to select those numbers
|
|
more often than others, in problems of the same sort.
|
|
Eventually it will forgive and forget.
|
|
.Pp
|
|
.Nm
|
|
cannot be persuaded to tell you the right answer.
|
|
You must work it out for yourself.
|
|
.Sh DIAGNOSTICS
|
|
.Dq What?
|
|
if you get a question wrong.
|
|
.Dq Right!
|
|
if you get it right.
|
|
.Dq Please type a number.
|
|
if
|
|
.Nm
|
|
doesn't understand what you typed.
|
|
.Sh SEE ALSO
|
|
.Xr bc 1 ,
|
|
.Xr dc 1
|