projects / unix-history / blame
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1 | .\" Copyright (c) 1989 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| fb330e38 | 3 | .\" |
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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 are permitted | |
| 8 | .\" provided that the above copyright notice and this paragraph are | |
| 9 | .\" duplicated in all such forms and that any documentation, | |
| 10 | .\" advertising materials, and other materials related to such | |
| 11 | .\" distribution and use acknowledge that the software was developed | |
| 12 | .\" by the University of California, Berkeley. The name of the | |
| 13 | .\" University may not be used to endorse or promote products derived | |
| 14 | .\" from this software without specific prior written permission. | |
| 15 | .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 16 | .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 17 | .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 18 | .\" | |
| afb3876d | 19 | .\" @(#)arithmetic.6 6.5 (Berkeley) %G% |
| afa1807c | 20 | .\" |
| afb3876d | 21 | .TH ARITHMETIC 6 "" |
| afa1807c | 22 | .UC 4 |
| fb330e38 | 23 | .SH NAME |
| afa1807c | 24 | arithmetic \- quiz on simple arithmetic |
| fb330e38 | 25 | .SH SYNOPSIS |
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26 | .B arithmetic |
| 27 | .B [ | |
| 07bd5315 | 28 | \-o +\-x/ |
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29 | .B ] |
| 30 | .B [ | |
| 07bd5315 | 31 | \-r range |
| afa1807c | 32 | .B ] |
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33 | .SH DESCRIPTION |
| 34 | .I Arithmetic | |
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35 | asks you to solve problems in simple arithmetic. |
| 36 | Each question must be answered correctly before going on to the next. | |
| 37 | After every 20 problems, it prints the score so far and the time taken. | |
| 38 | You can quit at any time by typing the interrupt or end-of-file character. | |
| fb330e38 | 39 | .PP |
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40 | The options are as follows: |
| 41 | .TP | |
| 42 | \-o | |
| 43 | By default, | |
| 44 | .I arithmetic | |
| 45 | asks questions on addition of numbers from 0 to 10, and corresponding | |
| 46 | subtraction. | |
| 47 | By supplying one or more of the characters | |
| 48 | .BR +\-x/ , | |
| 49 | you can ask for problems in addition, subtraction, multiplication, and | |
| 50 | division, respectively. | |
| 51 | If you give one of these characters more than once, that kind of problem | |
| 52 | will be asked correspondingly more often. | |
| 53 | .TP | |
| 54 | \-r | |
| 55 | If a | |
| 56 | .I range | |
| 57 | is supplied, | |
| 58 | .I arithmetic | |
| 59 | selects the numbers in its problems in the following way. | |
| 60 | For addition and multiplication, the numbers to be added or multiplied | |
| 61 | are between 0 and | |
| 62 | .IR range , | |
| 63 | inclusive. | |
| 64 | For subtraction and division, both the required result and the number to | |
| 65 | divide by or subtract will be between 0 and | |
| fb330e38 | 66 | .IR range . |
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67 | (Of course, |
| 68 | .I arithmetic | |
| 69 | will not ask you to divide by 0.) The default | |
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70 | .I range |
| 71 | is 10. | |
| 72 | .PP | |
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73 | When you get a problem wrong, |
| 74 | .I arithmetic | |
| 75 | will remember the numbers involved, and will tend to select those numbers | |
| 76 | more often than others, in problems of the same sort. | |
| 77 | Eventually it will forgive and forget. | |
| fb330e38 | 78 | .PP |
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79 | .I Arithmetic |
| 80 | cannot be persuaded to tell you the right answer. | |
| 81 | You must work it out for yourself. | |
| 82 | .SH DIAGNOSTICS | |
| 83 | ``What?'' if you get a question wrong. | |
| 84 | ``Right!'' if you get it right. | |
| 85 | ``Please type a number.'' if arithmetic doesn't understand what you typed. | |
| 86 | .SH "SEE ALSO" | |
| 87 | bc(1), dc(1) |