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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
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35.\" @(#)arithmetic.6 8.1 (Berkeley) 5/31/93
36.\" $FreeBSD: src/games/arithmetic/arithmetic.6,v 1.3 1999/08/27 23:28:52 peter Exp $
80c0a47f 37.\" $DragonFly: src/games/arithmetic/arithmetic.6,v 1.3 2005/07/31 21:38:32 swildner Exp $
984263bc 38.\"
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39.Dd May 31, 1993
40.Dt ARITHMETIC 6
41.Os
42.Sh NAME
43.Nm arithmetic
44.Nd quiz on simple arithmetic
45.Sh SYNOPSIS
46.Nm
47.Op Fl o Ar +-x/
48.Op Fl r Ar range
49.Sh DESCRIPTION
50.Nm
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51asks you to solve problems in simple arithmetic.
52Each question must be answered correctly before going on to the next.
53After every 20 problems, it prints the score so far and the time taken.
54You can quit at any time by typing the interrupt or end-of-file character.
80c0a47f 55.Pp
984263bc 56The options are as follows:
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57.Bl -tag -width ".Fl r Ar range"
58.It Fl o Ar +-x/
984263bc 59By default,
80c0a47f 60.Nm
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61asks questions on addition of numbers from 0 to 10, and corresponding
62subtraction.
63By supplying one or more of the characters
80c0a47f 64.Ar +-x/ ,
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65you can ask for problems in addition, subtraction, multiplication, and
66division, respectively.
67If you give one of these characters more than once, that kind of problem
68will be asked correspondingly more often.
80c0a47f 69.It Fl r Ar range
984263bc 70If a
80c0a47f 71.Ar range
984263bc 72is supplied,
80c0a47f 73.Nm
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74selects the numbers in its problems in the following way.
75For addition and multiplication, the numbers to be added or multiplied
76are between 0 and
80c0a47f 77.Ar range ,
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78inclusive.
79For subtraction and division, both the required result and the number to
80divide by or subtract will be between 0 and
80c0a47f 81.Ar range .
984263bc 82(Of course,
80c0a47f 83.Nm
984263bc 84will not ask you to divide by 0.) The default
80c0a47f 85.Ar range
984263bc 86is 10.
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87.El
88.Pp
984263bc 89When you get a problem wrong,
80c0a47f 90.Nm
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91will remember the numbers involved, and will tend to select those numbers
92more often than others, in problems of the same sort.
93Eventually it will forgive and forget.
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94.Pp
95.Nm
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96cannot be persuaded to tell you the right answer.
97You must work it out for yourself.
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98.Sh DIAGNOSTICS
99.Bl -diag
100.It "What?"
101if you get a question wrong.
102.It "Right!"
103if you get it right.
104.It "Please type a number."
105if arithmetic doesn't understand what you typed.
106.El
107.Sh SEE ALSO
108.Xr bc 1 ,
109.Xr dc 1