93 lines
4.2 KiB
Markdown
93 lines
4.2 KiB
Markdown
---
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title: 『新版Perl言語プログラミングレッスン入門編』 第11章 ファイル操作のつづき
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author: kazu634
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date: 2008-03-16
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url: /2008/03/16/_908/
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wordtwit_post_info:
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categories:
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- Perl
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- Programming
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---
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<div class="section">
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<p>
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つづき。
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</p>
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<p>
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<a name="seemore"></a>
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</p>
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<h4>
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練習問題
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</h4>
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<p>
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次のようなファイルを読み込んで、数字部分を足してその合計順に表示させる。
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</p>
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<blockquote>
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<p>
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さとうはなこ,佐藤花子,65,90,100,80,73
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</p>
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<p>
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あべかずま,阿部一馬,8,7,23,21,24
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</p>
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<p>
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いとうこういち,伊藤浩一,74,31,41,59,38
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</p>
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<p>
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さとうたろう,佐藤太郎,100,95,98,82,61
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</p>
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<p>
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むらまつしんじ,村松信二,55,48,79,90,88
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</p>
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<p>
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しんどうさんたろう,新藤三太郎,74,41,59,31,38
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</p>
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</blockquote>
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<p>
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私の回答:
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</p>
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<pre class="syntax-highlight">
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<span class="synStatement">use strict</span>;
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<span class="synStatement">use warnings</span>;
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<span class="synStatement">my</span> <span class="synIdentifier">$tmp_score</span>;
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<span class="synStatement">my</span> <span class="synIdentifier">%list</span>;
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<span class="synStatement">my</span> <span class="synIdentifier">$tmp_name</span>;
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<span class="synStatement">my</span> <span class="synIdentifier">@tmp</span>;
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<span class="synStatement">open</span>(<span class="synIdentifier">FILE</span>, <span class="synConstant">'data.txt'</span>) <span class="synStatement">or</span> <span class="synStatement">die</span> <span class="synConstant">"</span><span class="synIdentifier">$!</span><span class="synConstant">"</span>;
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<span class="synStatement">while</span> (<span class="synStatement">my</span> <span class="synIdentifier">$line</span> =<span class="synIdentifier"><FILE></span>) {
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<span class="synIdentifier">@tmp</span> = <span class="synStatement">split</span>(<span class="synStatement">/</span><span class="synConstant">,</span><span class="synStatement">/</span>, <span class="synIdentifier">$line</span>);
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<span class="synIdentifier">$tmp_name</span> = <span class="synIdentifier">$tmp</span>[<span class="synConstant">1</span>];
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<span class="synIdentifier">$tmp_score</span> = <span class="synIdentifier">$tmp</span>[<span class="synConstant">2</span>] + <span class="synIdentifier">$tmp</span>[<span class="synConstant">3</span>] + <span class="synIdentifier">$tmp</span>[<span class="synConstant">4</span>] + <span class="synIdentifier">$tmp</span> [<span class="synConstant">5</span>] + <span class="synIdentifier">$tmp</span>[<span class="synConstant">6</span>];
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<span class="synIdentifier">$list</span>{<span class="synIdentifier">$tmp_name</span>} = <span class="synIdentifier">$tmp_score</span>;
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}
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<span class="synStatement">close</span>(<span class="synIdentifier">FILE</span>);
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<span class="synStatement">foreach</span> (<span class="synStatement">reverse</span>(<span class="synStatement">sort</span> {<span class="synIdentifier">$list</span>{<span class="synIdentifier">$a</span>} <=> <span class="synIdentifier">$list</span>{<span class="synIdentifier">$b</span>} } <span class="synStatement">keys</span> <span class="synIdentifier">%list</span>)) {
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<span class="synStatement">print</span> <span class="synConstant">"</span><span class="synIdentifier">$_</span><span class="synConstant"> : </span><span class="synIdentifier">$list</span><span class="synConstant">{</span><span class="synIdentifier">$_</span><span class="synConstant">}</span><span class="synSpecial">\n</span><span class="synConstant">"</span>;
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}
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</pre>
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<p>
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回答を見て思ったこと。
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</p>
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<ul>
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<li>
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my ($yomi, $name, @socres) = split (/,/, $line); という書き方はありなんですね。。。
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</li>
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</ul>
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<p>
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あと、ハッシュの使い方とかソートの仕方とかを忘れていた(..;)
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</p>
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</div> |