2019-03-31 11:00:21 +00:00
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---
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title: 第14章・入出力
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author: kazu634
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date: 2008-11-16
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wordtwit_post_info:
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- 'O:8:"stdClass":13:{s:6:"manual";b:0;s:11:"tweet_times";i:1;s:5:"delay";i:0;s:7:"enabled";i:1;s:10:"separation";s:2:"60";s:7:"version";s:3:"3.7";s:14:"tweet_template";b:0;s:6:"status";i:2;s:6:"result";a:0:{}s:13:"tweet_counter";i:2;s:13:"tweet_log_ids";a:1:{i:0;i:4381;}s:9:"hash_tags";a:0:{}s:8:"accounts";a:1:{i:0;s:7:"kazu634";}}'
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categories:
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- gauche
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- Lisp
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---
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<div class="section">
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<p>
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ゆっくりと勉強は進行中。今日は入出力です。
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</p>
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<h4>
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入力（文字や行を読み取る）
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</h4>
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<p>
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readなどの手続きを用いるようです。
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</p>
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<h4>
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出力
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</h4>
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<p>
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このような手続きがある:
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</p>
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<table>
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<tr>
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<th>
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write
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</th>
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<td>
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引数に渡されたオブジェクトの外部表現を出力します
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</td>
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</tr>
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<tr>
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<th>
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display
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</th>
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<td>
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引数に渡されたオブジェクトそれぞれが読みやすい形で出力します
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</td>
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</tr>
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<tr>
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<th>
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print
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</th>
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<td>
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displayと基本的に同じだけど、最後に改行を挿入します
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</td>
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</tr>
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<tr>
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<th>
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format
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</th>
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<td>
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C言語でいうところのprintfです
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</td>
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</tr>
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</table>
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<p>
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formatについては
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</p>
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<pre class="syntax-highlight">
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<span class="synSpecial">(</span><span class="synStatement">format</span> <出力先> <書式指定> <引数><span class="synSpecial">)</span>
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</pre>
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<p>
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という使い方です。出力先は#tの場合、デフォルトでは標準出力にフォーマットされた結果が出力される。#fの場合、formatした結果を戻り値とする。書式指定には以下のようなパラメータがあるよ:
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</p>
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<table>
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<tr>
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<th>
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~d
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</th>
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<th>
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~b
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</th>
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<th>
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~o
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</th>
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<th>
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~x
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</th>
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</tr>
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<tr>
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<td>
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10進数
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</td>
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<td>
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2進数
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</td>
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<td>
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8進数
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</td>
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<td>
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16進数
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</td>
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</tr>
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</table>
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<h5>
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例
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</h5>
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<pre class="syntax-highlight">
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gosh> <span class="synSpecial">(</span><span class="synStatement">write</span> <span class="synConstant">123</span><span class="synSpecial">)</span>
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<span class="synConstant">123</span>#<undef>
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gosh> <span class="synSpecial">(</span>display #\a<span class="synSpecial">)</span>
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a#<undef>
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gosh> <span class="synSpecial">(</span>display <span class="synConstant">"Gauche\n"</span><span class="synSpecial">)</span>
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Gauche
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#<undef>
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gosh> <span class="synSpecial">(</span><span class="synStatement">print</span> <span class="synConstant">"gauche"</span><span class="synSpecial">)</span>
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gauche
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#<undef>
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gosh> <span class="synSpecial">(</span><span class="synStatement">format</span> #f <span class="synConstant">"Result = |~10@a|\n"</span> <span class="synSpecial">(</span><span class="synStatement">*</span> <span class="synConstant">3</span> <span class="synConstant">4</span><span class="synSpecial">))</span>
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<span class="synConstant">"Result = | 12|\n"</span>
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gosh> <span class="synSpecial">(</span><span class="synStatement">format</span> #t <span class="synConstant">"Result = |~10@a|\n"</span> <span class="synSpecial">(</span><span class="synStatement">*</span> <span class="synConstant">3</span> <span class="synConstant">4</span><span class="synSpecial">))</span>
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Result <span class="synStatement">=</span> | <span class="synConstant">12</span>|
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#<undef>
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</pre>
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2019-04-02 16:06:15 +00:00
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</div>
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