arithmetic/arithmetic.6

   1 .\"     $NetBSD: arithmetic.6,v 1.6 1998/04/28 07:19:28 fair Exp $
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   6 .\" This code is derived from software contributed to Berkeley by
   7 .\" Eamonn McManus of Trinity College Dublin.
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  37 .\"     @(#)arithmetic.6        8.1 (Berkeley) 5/31/93
  38 .\"
  39 .Dd May 31, 1993
  40 .Dt ARITHMETIC 6
  41 .Os BSD 4
  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
  51 asks you to solve problems in simple arithmetic.
  52 Each question must be answered correctly before going on to the next.
  53 After every 20 problems, it prints the score so far and the time taken.
  54 You can quit at any time by typing the interrupt or end-of-file character.
  55 .Pp
  56 The options are as follows:
  57 .Bl -tag -width indent
  58 .It Fl o
  59 By default,
  60 .Nm
  61 asks questions on addition of numbers from 0 to 10, and corresponding
  62 subtraction.
  63 By supplying one or more of the characters
  64 .Ar +\-x/ ,
  65 you can ask for problems in addition, subtraction, multiplication, and
  66 division, respectively.
  67 If you give one of these characters more than once, that kind of problem
  68 will be asked correspondingly more often.
  69 .It Fl r
  70 If a
  71 .Ar range
  72 is supplied,
  73 .Nm
  74 selects the numbers in its problems in the following way.
  75 For addition and multiplication, the numbers to be added or multiplied
  76 are between 0 and
  77 .Ar range ,
  78 inclusive.
  79 For subtraction and division, both the required result and the number to
  80 divide by or subtract will be between 0 and
  81 .Ar range .
  82 (Of course,
  83 .Nm
  84 will not ask you to divide by 0.)  The default
  85 .I range
  86 is 10.
  87 .El
  88 .Pp
  89 When you get a problem wrong,
  90 .Nm
  91 will remember the numbers involved, and will tend to select those numbers
  92 more often than others, in problems of the same sort.
  93 Eventually it will forgive and forget.
  94 .Pp
  95 .Nm
  96 cannot be persuaded to tell you the right answer.
  97 You must work it out for yourself.
  98 .Sh DIAGNOSTICS
  99 .Dq What?
 100 if you get a question wrong.
 101 .Dq Right!
 102 if you get it right.
 103 .Dq Please type a number.
 104 if arithmetic doesn't understand what you typed.
 105 .Sh SEE ALSO
 106 .Xr bc 1 ,
 107 .Xr dc 1