arithmetic/arithmetic.6

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  35 .\"     from: @(#)arithmetic.6  6.6 (Berkeley) 6/23/90
  36 .\"     $Id: arithmetic.6,v 1.3 1993/08/05 01:46:15 jtc Exp $
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  38 .Dd June 23, 1990
  39 .Dt ARITHMETIC 6
  40 .UC 4
  41 .Sh NAME
  42 .Nm arithmetic
  43 .Nd quiz on simple arithmetic
  44 .Sh SYNOPSIS
  45 .Nm arithmetic
  46 .Op Fl o Ar +\-x/
  47 .Op Fl r Ar range
  48 .Sh DESCRIPTION
  49 .Nm Arithmetic
  50 asks you to solve problems in simple arithmetic.
  51 Each question must be answered correctly before going on to the next.
  52 After every 20 problems, it prints the score so far and the time taken.
  53 You can quit at any time by typing the interrupt or end-of-file character.
  54 .Pp
  55 The options are as follows:
  56 .Bl -tag -width indent
  57 .It Fl o
  58 By default,
  59 .Nm arithmetic
  60 asks questions on addition of numbers from 0 to 10, and corresponding
  61 subtraction.
  62 By supplying one or more of the characters
  63 .Ar +\-x/ ,
  64 you can ask for problems in addition, subtraction, multiplication, and
  65 division, respectively.
  66 If you give one of these characters more than once, that kind of problem
  67 will be asked correspondingly more often.
  68 .It Fl r
  69 If a
  70 .Ar range
  71 is supplied,
  72 .Nm arithmetic
  73 selects the numbers in its problems in the following way.
  74 For addition and multiplication, the numbers to be added or multiplied
  75 are between 0 and
  76 .Ar range ,
  77 inclusive.
  78 For subtraction and division, both the required result and the number to
  79 divide by or subtract will be between 0 and
  80 .Ar range .
  81 (Of course,
  82 .Nm arithmetic
  83 will not ask you to divide by 0.)  The default
  84 .I range
  85 is 10.
  86 .El
  87 .Pp
  88 When you get a problem wrong,
  89 .Nm arithmetic
  90 will remember the numbers involved, and will tend to select those numbers
  91 more often than others, in problems of the same sort.
  92 Eventually it will forgive and forget.
  93 .Pp
  94 .Nm Arithmetic
  95 cannot be persuaded to tell you the right answer.
  96 You must work it out for yourself.
  97 .Sh DIAGNOSTICS
  98 .Dq What?
  99 if you get a question wrong.
 100 .Dq Right!
 101 if you get it right.
 102 .Dq Please type a number.
 103 if arithmetic doesn't understand what you typed.
 104 .Sh SEE ALSO
 105 .Xr bc 1 ,
 106 .Xr dc 1