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Some minor updates for 15 years later.
author David A. Holland
date Tue, 31 May 2022 01:45:26 -0400
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1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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2 <HTML>
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3 <HEAD>
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4 <TITLE>Pair Class Definition</TITLE>
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5 </HEAD>
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6
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7
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8 <BODY BGCOLOR="#ffffff" BACKGROUND="tilbl6h.gif"
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9 TEXT="#000000" LINK="#0033CC"
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10 VLINK="#CC0033" ALINK="#CC0099">
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11
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12 <P>
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13 <IMG ALIGN="right" SRC="../images/agrsl6c.gif" ALT="AnaGram"
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14 WIDTH=124 HEIGHT=30 >
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15 <BR CLEAR="all">
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16 Back to :
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17 <A HREF="../index.html">Index</A> |
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18 <A HREF="index.html">Class libraries for examples</A>
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19 <P>
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20
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21 <IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------"
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22 WIDTH=1010 HEIGHT=2 >
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23 <P>
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24
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25 <H1>Pair Class Definition</H1>
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26 <IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------"
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27 WIDTH=1010 HEIGHT=2 >
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28 <P>
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29 <BR>
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30 <H2>Introduction</H2>
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31 <P>
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32 <CODE> pair&lt;class T&gt; </CODE> is a template class that provides arithmetic
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33 and comparison operations on ordered pairs of elements of
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34 type T. Class T must implement arithmetic and comparison
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35 operators.
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36 <P>
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37 All operations are element-wise, including multiplication,
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38 division and comparisons. Using these definitions, sets
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39 of pairs are not well ordered in the mathematical sense. That
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40 is, it is possible that for pairs p and q both p &lt; q and
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41 p &gt; q could be false.
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42 <P>
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43 Pairs of integers are quite useful for recording and
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44 manipulating screen coordinates.
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45 <P>
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46 <BR>
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47
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48 <H2> Constructors </H2>
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49
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50 There are two constructors, one which takes two arguments of
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51 type T, and sets the elements of the pair appropriately. The
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52 other constructor takes no arguments, and initializes the
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53 elements to zero.
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54
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55 <P>
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56 <BR>
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57
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58
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59 <IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------"
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60 WIDTH=1010 HEIGHT=2 >
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61 <P>
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62 <IMG ALIGN="right" SRC="../images/pslrb6d.gif" ALT="Parsifal Software"
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63 WIDTH=181 HEIGHT=25>
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64 <BR CLEAR="right">
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65
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66 <P>
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67 Back to :
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68 <A HREF="../index.html">Index</A> |
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69 <A HREF="index.html">Class libraries for examples</A>
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70
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71 <P>
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72 <ADDRESS><FONT SIZE="-1">
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73 AnaGram parser generator - examples<BR>
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74 Class libraries - Pair class definition<BR>
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75 Copyright &copy; 1993-1999, Parsifal Software. <BR>
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76 All Rights Reserved.<BR>
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77 </FONT></ADDRESS>
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78
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79 </BODY>
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80 </HTML>
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