blog/content/post/2007/12/06/2007-12-06-00000668.md

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---
title: ちょっとミスしてた
author: kazu634
date: 2007-12-06
url: /2007/12/06/_714/
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categories:
- Perl
---
<div class="section">
<p>
 最後の13桁目はチェックデジットだから、無視しなきゃいけなかった。だからこんな感じ:
</p>
<pre class="syntax-highlight">
<span class="synStatement">use strict</span>;
<span class="synStatement">use warnings</span>;
<span class="synComment"># 変数の宣言</span>
<span class="synStatement">my</span> <span class="synIdentifier">$temp_isbn</span>;
<span class="synStatement">my</span> <span class="synIdentifier">$_odd</span>;
<span class="synStatement">my</span> <span class="synIdentifier">$_even</span>;
<span class="synComment"># 適当なisbn10を代入して、978をつける</span>
<span class="synIdentifier">$temp_isbn</span> = <span class="synConstant">'978'</span> . <span class="synConstant">'4582744176'</span>;
<span class="synStatement">print</span> <span class="synConstant">&#34;isbn: &#34;</span> . <span class="synIdentifier">$temp_isbn</span> . <span class="synConstant">&#34;</span><span class="synSpecial">\n</span><span class="synConstant">&#34;</span>;
<span class="synComment"># 一桁ずつばらして配列@fooに代入</span>
<span class="synStatement">my</span> <span class="synIdentifier">@foo</span> = <span class="synStatement">split</span>(<span class="synStatement">//</span>, <span class="synIdentifier">$temp_isbn</span>);
<span class="synComment"># 奇数の処理</span>
<span class="synComment"># @fooには13桁のisbnが入っている。配列は0-12まで。</span>
<span class="synComment"># @foo[12]はチェックデジットなので、しかとする。</span>
<span class="synStatement">print</span> <span class="synConstant">'Odd Number: '</span>;
<span class="synStatement">for</span> (<span class="synStatement">my</span> <span class="synIdentifier">$i</span> = <span class="synConstant"></span>; <span class="synIdentifier">$i</span> &#60;= <span class="synConstant">11</span>; <span class="synIdentifier">$i</span> = <span class="synIdentifier">$i</span> + <span class="synConstant">2</span>){
<span class="synIdentifier">$_odd</span> += <span class="synIdentifier">$foo</span>[<span class="synIdentifier">$i</span>];
<span class="synStatement">print</span> <span class="synIdentifier">$foo</span>[<span class="synIdentifier">$i</span>] . <span class="synConstant">&#34; &#34;</span>;
}
<span class="synStatement">print</span> <span class="synConstant">&#34;</span><span class="synSpecial">\n</span><span class="synConstant">&#34;</span>;
<span class="synComment"># 偶数の処理。以下同文。</span>
<span class="synStatement">print</span> <span class="synConstant">'Even Number: '</span>;
<span class="synStatement">for</span> (<span class="synStatement">my</span> <span class="synIdentifier">$i</span> = <span class="synConstant">1</span>; <span class="synIdentifier">$i</span> &#60;= <span class="synConstant">11</span>; <span class="synIdentifier">$i</span> = <span class="synIdentifier">$i</span> + <span class="synConstant">2</span>){
<span class="synIdentifier">$_even</span> += <span class="synIdentifier">$foo</span>[<span class="synIdentifier">$i</span>];
<span class="synStatement">print</span> <span class="synIdentifier">$foo</span>[<span class="synIdentifier">$i</span>] . <span class="synConstant">&#34; &#34;</span>;
}
<span class="synStatement">print</span> <span class="synConstant">&#34;</span><span class="synSpecial">\n</span><span class="synConstant">&#34;</span>;
</pre>
<ul>
<li>
元記事 <ul>
<li>
<a href="http://d.hatena.ne.jp/sirocco634/20071203#1196608244" onclick="__gaTracker('send', 'event', 'outbound-article', 'http://d.hatena.ne.jp/sirocco634/20071203#1196608244', '2007-12-03 &#8211; 武蔵の日記');" target="_blank">2007-12-03 &#8211; 武蔵の日記</a>
</li>
<li>
<a href="http://d.hatena.ne.jp/sirocco634/20071202#1196605129" onclick="__gaTracker('send', 'event', 'outbound-article', 'http://d.hatena.ne.jp/sirocco634/20071202#1196605129', '2007-12-02 &#8211; 武蔵の日記');" target="_blank">2007-12-02 &#8211; 武蔵の日記</a>
</li>
</ul>
</li>
</ul>
</div>