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‎lang/cpp11/long_long_type.html

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<p class="text-right"><small>
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最終更新日時(UTC):
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<span itemprop="datePublished" content="2024-07-08T07:33:21">
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2024年07月08日 07時33分21秒
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<span itemprop="datePublished" content="2025-07-04T14:58:11">
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</span>
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<br/>
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<span itemprop="author" itemscope itemtype="http://schema.org/Person">
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<span itemprop="name">Akira Takahashi</span>
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<span itemprop="name">rotarymars</span>
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</small></p>
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<h2>備考</h2>
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<p><code>long long</code>型の追加にともなって、ライブラリにも以下のような変更が入った：</p>
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<ul>
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<li><code><span href="https://cpprefjp.github.io/reference/cstdio/fprintf.md.nolink">fprintf()</span></code>と<code><span href="https://cpprefjp.github.io/reference/cstdio/fscanf.md.nolink">fscanf()</span></code>およびそのフォーマットを使用する関数に、<code>long long</code>を表す<code>ll</code>が表現幅を指示するために追加された。</li>
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<li><code><a href="../../reference/cstdio/fprintf.html">fprintf()</a></code>と<code><a href="../../reference/cstdio/fscanf.html">fscanf()</a></code>およびそのフォーマットを使用する関数に、<code>long long</code>を表す<code>ll</code>が表現幅を指示するために追加された。</li>
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<li><code>#if</code>および<code>#elif</code>に指定する定数条件式の評価について、「<code>(unsigned) int</code>は<code>(unsigned) long</code>と同じ表現（範囲）を持つように振舞う」とされていたのが、「全ての符号付きまたは符号無し整数型はそれぞれ<code><a href="../../reference/cstdint/intmax_t.html">intmax_t</a></code>または<code><a href="../../reference/cstdint/uintmax_t.html">uintmax_t</a></code>の表現（範囲）を持つように振舞う」と変更された。</li>
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<li>その他、入出力や数学の関数にも、<code>long long</code>型のサポートが追加された。</li>
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‎lang/cpp11/raw_string_literals.html

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<span itemprop="datePublished" content="2025-07-04T14:59:02">
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<span itemprop="author" itemscope itemtype="http://schema.org/Person">
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<span itemprop="name">rotarymars</span>
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<span class="n"><a href="../../reference/streambuf/basic_streambuf.html">std::streambuf</a></span><span class="o">*</span> <span class="n">soutbuf</span> <span class="o">=</span> <span class="n">sout</span><span class="p">.</span><span class="n"><a href="../../reference/ios/basic_ios/rdbuf.html">rdbuf</a></span><span class="p">();</span>
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<span class="n"><a href="../../reference/iostream/cout.html">std::cout</a></span><span class="p">.</span><span class="n"><a href="../../reference/ios/basic_ios/rdbuf.html">rdbuf</a></span><span class="p">(</span><span class="n">soutbuf</span><span class="p">);</span>
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<span class="n"><span href="https://cpprefjp.github.io/reference/cstdio/fprintf.md.nolink">std::fprintf</span></span><span class="p">(</span><span class="n">stdout</span><span class="p">,</span> <span class="n">fmt</span><span class="p">,</span> <span class="n">args</span><span class="p">...);</span>
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<span class="n"><a href="../../reference/cstdio/fprintf.html">std::fprintf</a></span><span class="p">(</span><span class="n">stdout</span><span class="p">,</span> <span class="n">fmt</span><span class="p">,</span> <span class="n">args</span><span class="p">...);</span>
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<span class="n"><a href="../../reference/string/basic_string.html">std::string</a></span> <span class="n">result</span> <span class="o">=</span> <span class="n">sout</span><span class="p">.</span><span class="n"><a href="../../reference/sstream/basic_stringstream/str.html">str()</a></span><span class="p">;</span>
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‎reference/cstdio.html

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<tr>
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<td><code>fscanf</code></td>
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<td><code><a href="cstdio/fscanf.html">fscanf</a></code></td>
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<td>書式を指定してファイルから入力する</td>
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‎reference/cstdio/fscanf.html

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2025年07月04日 14時51分05秒
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<span class="fa fa-fw fa-pencil"></span>編集
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<div class="identifier-type">function</div><div class="header">&lt;cstdio&gt;</div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="token">fscanf</span></h1>
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<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="kt">int</span> <span class="nf">fscanf</span><span class="p">(</span> <span class="kt">FILE</span><span class="o">*</span> <span class="k">restrict</span> <span class="n">stream</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span><span class="o">*</span> <span class="k">restrict</span> <span class="n">format</span><span class="p">,</span> <span class="p">...</span> <span class="p">);</span>
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</code></pre></div>
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</p>
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<h2>概要</h2>
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<p>指定されたファイルストリームから、指定された書式文字列を使用してデータを入力する。</p>
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<h2>例</h2>
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<p><div class="yata" id="9e87de0ed80959428e93a37da2fdaeb6e3f698a2"><div class="codehilite"><pre><span></span><code><span class="cp">#include</span> <span class="cpf"><a href="../cstdio.html">&lt;cstdio&gt;</a></span><span class="cp"></span>
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<span class="kt">int</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>
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<span class="kt">int</span> <span class="n">n</span><span class="p">;</span>
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<span class="k">const</span> <span class="kt">char</span><span class="o">*</span> <span class="n">path</span> <span class="o">=</span> <span class="s">"test.txt"</span><span class="p">;</span>
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<span class="n"><span href="https://cpprefjp.github.io/reference/cstdio/file.md.nolink">std::FILE</span></span><span class="o">*</span> <span class="n">fp</span> <span class="o">=</span> <span class="n"><span href="https://cpprefjp.github.io/reference/cstdio/fopen.md.nolink">std::fopen</span></span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s">"r"</span><span class="p">);</span>
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<span class="n"><span style="color:#ff0000">std::fscanf</span></span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="s">"%d"</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">n</span><span class="p">);</span>
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<span class="n"><span href="https://cpprefjp.github.io/reference/cstdio/fclose.md.nolink">std::fclose</span></span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
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<span class="n">std</span><span class="o">::</span><span class="n">printf</span><span class="p">(</span><span class="s">"%d</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">n</span><span class="p">);</span>
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<span class="p">}</span>
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</code></pre></div>
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</div></p>
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<h3>出力(test.txtは以下参照)</h3>
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<p><pre><code>123
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</code></pre></p>
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<h3>ファイル内容(test.txt)</h3>
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<p><pre><code>123
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</code></pre></p>
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<h2>処理系</h2>
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<ul>
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<li><a href="../../implementation.html#clang">Clang</a>: ??</li>
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<li><a href="../../implementation.html#gcc">GCC</a>: ??</li>
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<li><a href="../../implementation.html#visual_cpp">Visual C++</a>: ??</li>
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‎reference/cstdio/stderr.html

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<p class="text-right"><small>
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<span class="kt">int</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>
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<span class="n">std</span><span class="o">::</span><span class="kt">FILE</span><span class="o">*</span> <span class="n">fp</span> <span class="o">=</span> <span class="n"><span style="color:#ff0000">stderr</span></span><span class="p">;</span>
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<span class="n"><span href="https://cpprefjp.github.io/reference/cstdio/fprintf.md.nolink">std::fprintf</span></span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="s">"Hello, World!</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
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<span class="n"><a href="fprintf.html">std::fprintf</a></span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="s">"Hello, World!</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
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<span class="p">}</span>
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</code></pre></div>
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</div></p>

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