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[dragonfly.git] / games / arithmetic / arithmetic.6
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1.\" Copyright (c) 1989, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" Eamonn McManus of Trinity College Dublin.
6.\"
7.\" Redistribution and use in source and binary forms, with or without
8.\" modification, are permitted provided that the following conditions
9.\" are met:
10.\" 1. Redistributions of source code must retain the above copyright
11.\" notice, this list of conditions and the following disclaimer.
12.\" 2. Redistributions in binary form must reproduce the above copyright
13.\" notice, this list of conditions and the following disclaimer in the
14.\" documentation and/or other materials provided with the distribution.
6693db17 15.\" 3. Neither the name of the University nor the names of its contributors
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16.\" may be used to endorse or promote products derived from this software
17.\" without specific prior written permission.
18.\"
19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29.\" SUCH DAMAGE.
30.\"
31.\" @(#)arithmetic.6 8.1 (Berkeley) 5/31/93
32.\" $FreeBSD: src/games/arithmetic/arithmetic.6,v 1.3 1999/08/27 23:28:52 peter Exp $
b7367ef6 33.\" $DragonFly: src/games/arithmetic/arithmetic.6,v 1.4 2007/10/20 17:56:46 swildner Exp $
984263bc 34.\"
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35.Dd May 31, 1993
36.Dt ARITHMETIC 6
37.Os
38.Sh NAME
39.Nm arithmetic
40.Nd quiz on simple arithmetic
41.Sh SYNOPSIS
42.Nm
43.Op Fl o Ar +-x/
44.Op Fl r Ar range
45.Sh DESCRIPTION
46.Nm
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47asks you to solve problems in simple arithmetic.
48Each question must be answered correctly before going on to the next.
49After every 20 problems, it prints the score so far and the time taken.
50You can quit at any time by typing the interrupt or end-of-file character.
80c0a47f 51.Pp
984263bc 52The options are as follows:
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53.Bl -tag -width ".Fl r Ar range"
54.It Fl o Ar +-x/
984263bc 55By default,
80c0a47f 56.Nm
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57asks questions on addition of numbers from 0 to 10, and corresponding
58subtraction.
59By supplying one or more of the characters
80c0a47f 60.Ar +-x/ ,
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61you can ask for problems in addition, subtraction, multiplication, and
62division, respectively.
63If you give one of these characters more than once, that kind of problem
64will be asked correspondingly more often.
80c0a47f 65.It Fl r Ar range
984263bc 66If a
80c0a47f 67.Ar range
984263bc 68is supplied,
80c0a47f 69.Nm
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70selects the numbers in its problems in the following way.
71For addition and multiplication, the numbers to be added or multiplied
72are between 0 and
80c0a47f 73.Ar range ,
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74inclusive.
75For subtraction and division, both the required result and the number to
76divide by or subtract will be between 0 and
80c0a47f 77.Ar range .
984263bc 78(Of course,
80c0a47f 79.Nm
984263bc 80will not ask you to divide by 0.) The default
80c0a47f 81.Ar range
984263bc 82is 10.
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83.El
84.Pp
984263bc 85When you get a problem wrong,
80c0a47f 86.Nm
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87will remember the numbers involved, and will tend to select those numbers
88more often than others, in problems of the same sort.
89Eventually it will forgive and forget.
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90.Pp
91.Nm
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92cannot be persuaded to tell you the right answer.
93You must work it out for yourself.
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94.Sh DIAGNOSTICS
95.Bl -diag
96.It "What?"
97if you get a question wrong.
98.It "Right!"
99if you get it right.
100.It "Please type a number."
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101if
102.Nm
103doesn't understand what you typed.
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104.El
105.Sh SEE ALSO
106.Xr bc 1 ,
107.Xr dc 1