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<div class="moz-cite-prefix">Thanks,<br>
<br>
That means that the distance is de square of x^2 + y^2<br>
Then I can make this exercise. <br>
<br>
Thanks. Following the book when Englisch is not your mother
language can be diffucult sometimes.<br>
<br>
Roelof<br>
<br>
<br>
<br>
Op 23-6-2012 16:18, Matthias Felleisen schreef:<br>
</div>
<blockquote
cite="mid:47F7EB3C-3C87-4706-B031-F51925000CCC@ccs.neu.edu"
type="cite">
<div><br>
</div>
<div>Origin means (0,0) or plain 0 in English. </div>
<div><br>
</div>
<br>
<div>
<div>On Jun 22, 2012, at 2:42 PM, Roelof Wobben wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">
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<div bgcolor="#FFFFFF" text="#000000"> Hello, <br>
<br>
I try to make this exercise : <br>
<br>
<div class="SIntrapara"><a moz-do-not-send="true"
name="(counter._mix._(exercise._mix4))"></a><span
style="font-weight: bold;">Exercise</span> 76: A
programmer has chosen to represent locations as Cartesian
points or just points:</div>
<div class="SIntrapara">
<blockquote class="SCodeFlow">
<table class="RktBlk" cellspacing="0">
<tbody>
<tr>
<td><span class="RktCmt">;</span><span
class="RktCmt"> </span><span class="RktCmt">Location
is one of:</span></td>
</tr>
<tr>
<td><span class="RktCmt">;</span><span
class="RktCmt"> </span><span class="RktCmt">–</span><span
class="RktCmt"> Posn</span></td>
</tr>
<tr>
<td><span class="RktCmt">;</span><span
class="RktCmt"> </span><span class="RktCmt">–</span><span
class="RktCmt"> Number</span></td>
</tr>
<tr>
<td><span class="RktCmt">;</span><span
class="RktCmt"> </span><span class="RktCmt">interp.
Posn are positions on the Cartesian grid,</span></td>
</tr>
<tr>
<td><span class="RktCmt">;</span><span
class="RktCmt"> </span><span class="RktCmt">Numbers
are positions on the number line </span></td>
</tr>
</tbody>
</table>
</blockquote>
</div>
<div class="SIntrapara">Design the function <span
class="RktSym">in-reach</span>, which determines whether
or not a given location’s distance to the origin is
strictly less than some constant<span class="RktSym">R</span>.<br>
<br>
So I must design a function called in-reach.<br>
<br>
Am I right I need to use two structs (Posn) . One for the
given location and one for the origon ?<br>
<br>
Regards, <br>
<br>
Roelof<br>
<br>
<br>
</div>
<br>
</div>
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</blockquote>
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<br>
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