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<header data-kunai-mdinfo="{"meta": {"header": ["locale"], "namespace": ["std"], "id-type": ["class template"]}, "sources": [{"id": "8d90fed6baf223e77ea513475c7fe1adfd6427c0", "source": "#include <iostream>\n#include <sstream>\n#include <locale>\n#include <iterator>\n\nint main()\n{\n std::ostringstream oss;\n\n // \u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30ed\u30b1\u30fc\u30eb\u304b\u3089money_put\u30d5\u30a1\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\n const auto& facet = std::use_facet<std::money_put<char>>(oss.getloc());\n\n facet.put(std::ostreambuf_iterator<char>{oss}, false, oss, ' ', 105623.0L);\n\n std::cout << oss.str() << std::endl;\n}\n"}, {"id": "ac272dbee7e0b80d3aaa84ef39a57435e5e40a46", "source": "#include <iostream>\n#include <sstream>\n#include <locale>\n#include <iterator>\n#include <string>\n\n// \u901a\u8ca8\u8a18\u53f7\u3068\u6841\u533a\u5207\u308a\u3092\u6301\u3064moneypunct\u30d5\u30a1\u30bb\u30c3\u30c8\nstruct my_moneypunct : std::moneypunct<char> {\nprotected:\n char_type do_decimal_point() const override { return '.'; }\n char_type do_thousands_sep() const override { return ','; }\n std::string do_grouping() const override { return \"\\3\"; } // 3\u6841\u3054\u3068\u306b\u533a\u5207\u308b\n string_type do_curr_symbol() const override { return \"$\"; }\n string_type do_negative_sign() const override { return \"-\"; }\n int do_frac_digits() const override { return 2; } // \u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\n\n pattern do_pos_format() const override { return pattern{{symbol, sign, none, value}}; }\n pattern do_neg_format() const override { return pattern{{symbol, sign, none, value}}; }\n};\n\nint main()\n{\n std::ostringstream oss;\n oss.imbue(std::locale{std::locale::classic(), new my_moneypunct{}});\n\n const auto& facet = std::use_facet<std::money_put<char>>(oss.getloc());\n\n // showbase\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u901a\u8ca8\u8a18\u53f7\u304c\u51fa\u529b\u3055\u308c\u308b\n oss.setf(std::ios_base::showbase);\n facet.put(std::ostreambuf_iterator<char>{oss}, false, oss, ' ', 105623.0L);\n oss << '\\n';\n\n // showbase\u3092\u8a2d\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001\u901a\u8ca8\u8a18\u53f7\u306f\u51fa\u529b\u3055\u308c\u306a\u3044\n oss.unsetf(std::ios_base::showbase);\n facet.put(std::ostreambuf_iterator<char>{oss}, false, oss, ' ', 105623.0L);\n oss << '\\n';\n\n // \u8ca0\u306e\u5024\u306b\u306fdo_neg_format()\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u4f7f\u7528\u3055\u308c\u308b\n oss.setf(std::ios_base::showbase);\n facet.put(std::ostreambuf_iterator<char>{oss}, false, oss, ' ', -105623.0L);\n\n std::cout << oss.str() << std::endl;\n}\n"}, {"id": "920a56067af91ca5aeddf8ce43576554e6866b58", "source": "#include <iostream>\n#include <sstream>\n#include <locale>\n#include <iterator>\n#include <string>\n\n// \u65e5\u672c\u5186\u306emoneypunct\u30d5\u30a1\u30bb\u30c3\u30c8\nstruct jpy_moneypunct : std::moneypunct<char> {\nprotected:\n char_type do_thousands_sep() const override { return ','; }\n std::string do_grouping() const override { return \"\\3\"; }\n string_type do_curr_symbol() const override { return \"\u5186\"; }\n string_type do_negative_sign() const override { return \"-\"; }\n int do_frac_digits() const override { return 0; } // \u5186\u306b\u88dc\u52a9\u5358\u4f4d\u306f\u306a\u3044\n\n // \u5024\u306e\u5f8c\u308d\u306b\u901a\u8ca8\u8a18\u53f7\u3092\u7f6e\u304f\n pattern do_pos_format() const override { return pattern{{sign, value, none, symbol}}; }\n pattern do_neg_format() const override { return pattern{{sign, value, none, symbol}}; }\n};\n\nint main()\n{\n std::ostringstream oss;\n oss.imbue(std::locale{std::locale::classic(), new jpy_moneypunct{}});\n oss.setf(std::ios_base::showbase);\n\n const auto& facet = std::use_facet<std::money_put<char>>(oss.getloc());\n\n facet.put(std::ostreambuf_iterator<char>{oss}, false, oss, ' ', 105623.0L);\n oss << '\\n';\n facet.put(std::ostreambuf_iterator<char>{oss}, false, oss, ' ', -105623.0L);\n\n std::cout << oss.str() << std::endl;\n}\n"}, {"id": "1b2128593c51150efc62456a4331af47d0803be7", "source": "#include <iostream>\n#include <sstream>\n#include <locale>\n#include <iterator>\n#include <string>\n#include <stdexcept>\n\n// \u66f8\u5f0f\u5316\u306e\u51e6\u7406\u81ea\u4f53\u306f\u30ed\u30b1\u30fc\u30eb\u306b\u4f9d\u5b58\u3057\u306a\u3044\nstd::string format_money(const std::locale& loc, long double units)\n{\n std::ostringstream oss;\n oss.imbue(loc);\n oss.setf(std::ios_base::showbase);\n\n const auto& facet = std::use_facet<std::money_put<char>>(oss.getloc());\n facet.put(std::ostreambuf_iterator<char>{oss}, false, oss, ' ', units);\n\n return oss.str();\n}\n\nint main()\n{\n for (const char* name : {\"en_US.UTF-8\", \"ja_JP.UTF-8\", \"de_DE.UTF-8\"}) {\n try {\n // \u540c\u3058\u5024\u3092\u3001\u30ed\u30b1\u30fc\u30eb\u3054\u3068\u306e\u901a\u8ca8\u306e\u66f8\u5f0f\u3067\u51fa\u529b\u3059\u308b\n std::string s = format_money(std::locale{name}, 105623.0L);\n std::cout << name << \" : \" << s << std::endl;\n }\n catch (const std::runtime_error&) {\n // \u6307\u5b9a\u3057\u305f\u540d\u524d\u306e\u30ed\u30b1\u30fc\u30eb\u304c\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\n std::cout << name << \" : not available\" << std::endl;\n }\n }\n}\n"}], "page_id": ["reference", "locale", "money_put"]}">
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最終更新日時:
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2026年08月25日 11時46分21秒 (JST)
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<div class="identifier-type">class template</div><div class="header"><locale></div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="token">money_put</span></h1>
<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="k">namespace</span><span class="w"> </span><span class="nn">std</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">template</span><span class="w"> </span><span class="o"><</span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">OutputIterator</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="../iterator/ostreambuf_iterator.html">ostreambuf_iterator</a></span><span class="o"><</span><span class="n">charT</span><span class="o">></span><span class="w"> </span><span class="o">></span>
<span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">money_put</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="n"><a href="locale/facet.html">locale::facet</a></span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
</p>
<h2>概要</h2>
<p><code>money_put</code>は、金額を書式化して出力ストリームへ出力するためのロケールファセットである。</p>
<p>書式は<code><a href="moneypunct.html">moneypunct</a></code>ファセットから取得した情報によって決まる。</p>
<h2>メンバ関数</h2>
<h3>publicメンバ関数</h3>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>名前</th>
<th>説明</th>
</tr>
</thead>
<tbody>
<tr>
<td><code><a href="money_put/op_constructor.html">(constructor)</a></code></td>
<td>コンストラクタ</td>
</tr>
<tr>
<td><code><a href="money_put/put.html">put</a></code></td>
<td>金額の出力</td>
</tr>
</tbody>
</table>
<h3>静的メンバ変数</h3>
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<thead>
<tr>
<th>名前</th>
<th>説明</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>static <a href="locale/id.html">locale::id</a> id;</code></td>
<td>このファセットを識別するためのID</td>
</tr>
</tbody>
</table>
<h3>protectedメンバ関数</h3>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>名前</th>
<th>説明</th>
</tr>
</thead>
<tbody>
<tr>
<td><code><a href="money_put/op_destructor.html">(destructor)</a></code></td>
<td>デストラクタ</td>
</tr>
<tr>
<td><code><a href="money_put/do_put.html">do_put</a></code></td>
<td>金額の出力 (virtual)</td>
</tr>
</tbody>
</table>
<h2>メンバ型</h2>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>名前</th>
<th>説明</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>char_type</code></td>
<td>文字型 <code>charT</code></td>
</tr>
<tr>
<td><code>iter_type</code></td>
<td>出力のイテレータ型 <code>OutputIterator</code></td>
</tr>
<tr>
<td><code>string_type</code></td>
<td>文字列型 <code><a href="../string/basic_string.html">std::basic_string</a><charT></code></td>
</tr>
</tbody>
</table>
<h2>例</h2>
<h3>基本的な使い方</h3>
<p><div class="yata" id="8d90fed6baf223e77ea513475c7fe1adfd6427c0"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../iostream.html"><iostream></a></span>
<span class="cp">#include <a href="../sstream.html"><sstream></a></span>
<span class="cp">#include <a href="../locale.html"><locale></a></span>
<span class="cp">#include <a href="../iterator.html"><iterator></a></span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span>
<span class="p">{</span>
<span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">ostringstream</span><span class="w"> </span><span class="n">oss</span><span class="p">;</span>
<span class="w"> </span><span class="c1">// ストリームのロケールからmoney_putファセットを取得する</span>
<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">auto</span><span class="o">&</span><span class="w"> </span><span class="n">facet</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="use_facet.html">std::use_facet</a></span><span class="o"><</span><span class="n"><span style="color:#ff0000">std::money_put</span></span><span class="o"><</span><span class="kt">char</span><span class="o">>></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/getloc.html">oss.getloc()</a></span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="money_put/put.html">facet.put</a></span><span class="p">(</span><span class="n"><a href="../iterator/ostreambuf_iterator.html">std::ostreambuf_iterator</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="p">{</span><span class="n">oss</span><span class="p">},</span><span class="w"> </span><span class="nb">false</span><span class="p">,</span><span class="w"> </span><span class="n">oss</span><span class="p">,</span><span class="w"> </span><span class="sc">' '</span><span class="p">,</span><span class="w"> </span><span class="mf">105623.0L</span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../sstream/basic_ostringstream/str.html">oss.str()</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
</div></p>
<h4>出力例</h4>
<p><pre><code>105623
</code></pre></p>
<ul>
<li><code>"C"</code>ロケールでは通貨記号も桁区切りも設定されていないため、数字のみが出力される</li>
</ul>
<h3>通貨記号と桁区切りを指定する</h3>
<p>書式は<code><a href="moneypunct.html">std::moneypunct</a></code>ファセットから取得される。<code>"C"</code>ロケールでは通貨記号も桁区切りも設定されていないため、これらを持つファセットをロケールへ組み込む。</p>
<p><div class="yata" id="ac272dbee7e0b80d3aaa84ef39a57435e5e40a46"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../iostream.html"><iostream></a></span>
<span class="cp">#include <a href="../sstream.html"><sstream></a></span>
<span class="cp">#include <a href="../locale.html"><locale></a></span>
<span class="cp">#include <a href="../iterator.html"><iterator></a></span>
<span class="cp">#include <a href="../string.html"><string></a></span>
<span class="c1">// 通貨記号と桁区切りを持つmoneypunctファセット</span>
<span class="k">struct</span><span class="w"> </span><span class="nc">my_moneypunct</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="n"><a href="moneypunct.html">std::moneypunct</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="w"> </span><span class="p">{</span>
<span class="k">protected</span><span class="o">:</span>
<span class="w"> </span><span class="n">char_type</span><span class="w"> </span><span class="n"><a href="moneypunct/do_decimal_point.html">do_decimal_point</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="sc">'.'</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">char_type</span><span class="w"> </span><span class="n"><a href="moneypunct/do_thousands_sep.html">do_thousands_sep</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="sc">','</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="n"><a href="moneypunct/do_grouping.html">do_grouping</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="s">"</span><span class="se">\3</span><span class="s">"</span><span class="p">;</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="c1">// 3桁ごとに区切る</span>
<span class="w"> </span><span class="n">string_type</span><span class="w"> </span><span class="n"><a href="moneypunct/do_curr_symbol.html">do_curr_symbol</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="s">"$"</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">string_type</span><span class="w"> </span><span class="n"><a href="moneypunct/do_negative_sign.html">do_negative_sign</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="s">"-"</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n"><a href="moneypunct/do_frac_digits.html">do_frac_digits</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">2</span><span class="p">;</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="c1">// 小数点以下2桁</span>
<span class="w"> </span><span class="n">pattern</span><span class="w"> </span><span class="n"><a href="moneypunct/do_pos_format.html">do_pos_format</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">pattern</span><span class="p">{{</span><span class="n">symbol</span><span class="p">,</span><span class="w"> </span><span class="n">sign</span><span class="p">,</span><span class="w"> </span><span class="n">none</span><span class="p">,</span><span class="w"> </span><span class="n">value</span><span class="p">}};</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">pattern</span><span class="w"> </span><span class="n"><a href="moneypunct/do_neg_format.html">do_neg_format</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">pattern</span><span class="p">{{</span><span class="n">symbol</span><span class="p">,</span><span class="w"> </span><span class="n">sign</span><span class="p">,</span><span class="w"> </span><span class="n">none</span><span class="p">,</span><span class="w"> </span><span class="n">value</span><span class="p">}};</span><span class="w"> </span><span class="p">}</span>
<span class="p">};</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span>
<span class="p">{</span>
<span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">ostringstream</span><span class="w"> </span><span class="n">oss</span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../ios/basic_ios/imbue.html">oss.imbue</a></span><span class="p">(</span><span class="n"><a href="locale.html">std::locale</a></span><span class="p">{</span><span class="n"><a href="locale.html">std::locale</a></span><span class="o">::</span><span class="n">classic</span><span class="p">(),</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">my_moneypunct</span><span class="p">{}});</span>
<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">auto</span><span class="o">&</span><span class="w"> </span><span class="n">facet</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="use_facet.html">std::use_facet</a></span><span class="o"><</span><span class="n"><span style="color:#ff0000">std::money_put</span></span><span class="o"><</span><span class="kt">char</span><span class="o">>></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/getloc.html">oss.getloc()</a></span><span class="p">);</span>
<span class="w"> </span><span class="c1">// showbaseを設定すると通貨記号が出力される</span>
<span class="w"> </span><span class="n"><a href="../ios/ios_base/setf.html">oss.setf</a></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/type-fmtflags.html">std::ios_base::showbase</a></span><span class="p">);</span>
<span class="w"> </span><span class="n">facet</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="n"><a href="../iterator/ostreambuf_iterator.html">std::ostreambuf_iterator</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="p">{</span><span class="n">oss</span><span class="p">},</span><span class="w"> </span><span class="nb">false</span><span class="p">,</span><span class="w"> </span><span class="n">oss</span><span class="p">,</span><span class="w"> </span><span class="sc">' '</span><span class="p">,</span><span class="w"> </span><span class="mf">105623.0L</span><span class="p">);</span>
<span class="w"> </span><span class="n">oss</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="sc">'\n'</span><span class="p">;</span>
<span class="w"> </span><span class="c1">// showbaseを設定しない場合、通貨記号は出力されない</span>
<span class="w"> </span><span class="n"><a href="../ios/ios_base/unsetf.html">oss.unsetf</a></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/type-fmtflags.html">std::ios_base::showbase</a></span><span class="p">);</span>
<span class="w"> </span><span class="n">facet</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="n"><a href="../iterator/ostreambuf_iterator.html">std::ostreambuf_iterator</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="p">{</span><span class="n">oss</span><span class="p">},</span><span class="w"> </span><span class="nb">false</span><span class="p">,</span><span class="w"> </span><span class="n">oss</span><span class="p">,</span><span class="w"> </span><span class="sc">' '</span><span class="p">,</span><span class="w"> </span><span class="mf">105623.0L</span><span class="p">);</span>
<span class="w"> </span><span class="n">oss</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="sc">'\n'</span><span class="p">;</span>
<span class="w"> </span><span class="c1">// 負の値には<a href="moneypunct/do_neg_format.html">do_neg_format</a>()のパターンが使用される</span>
<span class="w"> </span><span class="n"><a href="../ios/ios_base/setf.html">oss.setf</a></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/type-fmtflags.html">std::ios_base::showbase</a></span><span class="p">);</span>
<span class="w"> </span><span class="n">facet</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="n"><a href="../iterator/ostreambuf_iterator.html">std::ostreambuf_iterator</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="p">{</span><span class="n">oss</span><span class="p">},</span><span class="w"> </span><span class="nb">false</span><span class="p">,</span><span class="w"> </span><span class="n">oss</span><span class="p">,</span><span class="w"> </span><span class="sc">' '</span><span class="p">,</span><span class="w"> </span><span class="mf">-105623.0L</span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../sstream/basic_ostringstream/str.html">oss.str()</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
</div></p>
<h4>出力</h4>
<p><pre><code>$1,056.23
1,056.23
$-1,056.23
</code></pre></p>
<ul>
<li>引数の<code>105623</code>は最小単位（この例ではセント）での金額であり、<code><a href="moneypunct/do_frac_digits.html">do_frac_digits()</a></code>が<code>2</code>であるため<code>1,056.23</code>と表示される</li>
</ul>
<h3>通貨記号を末尾に置く（日本円の例）</h3>
<p>通貨記号の位置は<code><a href="moneypunct/do_pos_format.html">do_pos_format()</a></code>・<code><a href="moneypunct/do_neg_format.html">do_neg_format()</a></code>が返すパターンで決まる。<code>value</code>より後ろに<code>symbol</code>を置くことで、「1,000円」のように値の後ろへ通貨記号を出力できる。</p>
<p><div class="yata" id="920a56067af91ca5aeddf8ce43576554e6866b58"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../iostream.html"><iostream></a></span>
<span class="cp">#include <a href="../sstream.html"><sstream></a></span>
<span class="cp">#include <a href="../locale.html"><locale></a></span>
<span class="cp">#include <a href="../iterator.html"><iterator></a></span>
<span class="cp">#include <a href="../string.html"><string></a></span>
<span class="c1">// 日本円のmoneypunctファセット</span>
<span class="k">struct</span><span class="w"> </span><span class="nc">jpy_moneypunct</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="n"><a href="moneypunct.html">std::moneypunct</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="w"> </span><span class="p">{</span>
<span class="k">protected</span><span class="o">:</span>
<span class="w"> </span><span class="n">char_type</span><span class="w"> </span><span class="n"><a href="moneypunct/do_thousands_sep.html">do_thousands_sep</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="sc">','</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="n"><a href="moneypunct/do_grouping.html">do_grouping</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="s">"</span><span class="se">\3</span><span class="s">"</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">string_type</span><span class="w"> </span><span class="n"><a href="moneypunct/do_curr_symbol.html">do_curr_symbol</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="s">"円"</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">string_type</span><span class="w"> </span><span class="n"><a href="moneypunct/do_negative_sign.html">do_negative_sign</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="s">"-"</span><span class="p">;</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n"><a href="moneypunct/do_frac_digits.html">do_frac_digits</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="c1">// 円に補助単位はない</span>
<span class="w"> </span><span class="c1">// 値の後ろに通貨記号を置く</span>
<span class="w"> </span><span class="n">pattern</span><span class="w"> </span><span class="n"><a href="moneypunct/do_pos_format.html">do_pos_format</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">pattern</span><span class="p">{{</span><span class="n">sign</span><span class="p">,</span><span class="w"> </span><span class="n">value</span><span class="p">,</span><span class="w"> </span><span class="n">none</span><span class="p">,</span><span class="w"> </span><span class="n">symbol</span><span class="p">}};</span><span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">pattern</span><span class="w"> </span><span class="n"><a href="moneypunct/do_neg_format.html">do_neg_format</a></span><span class="p">()</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">override</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">pattern</span><span class="p">{{</span><span class="n">sign</span><span class="p">,</span><span class="w"> </span><span class="n">value</span><span class="p">,</span><span class="w"> </span><span class="n">none</span><span class="p">,</span><span class="w"> </span><span class="n">symbol</span><span class="p">}};</span><span class="w"> </span><span class="p">}</span>
<span class="p">};</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span>
<span class="p">{</span>
<span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">ostringstream</span><span class="w"> </span><span class="n">oss</span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../ios/basic_ios/imbue.html">oss.imbue</a></span><span class="p">(</span><span class="n"><a href="locale.html">std::locale</a></span><span class="p">{</span><span class="n"><a href="locale.html">std::locale</a></span><span class="o">::</span><span class="n">classic</span><span class="p">(),</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">jpy_moneypunct</span><span class="p">{}});</span>
<span class="w"> </span><span class="n"><a href="../ios/ios_base/setf.html">oss.setf</a></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/type-fmtflags.html">std::ios_base::showbase</a></span><span class="p">);</span>
<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">auto</span><span class="o">&</span><span class="w"> </span><span class="n">facet</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="use_facet.html">std::use_facet</a></span><span class="o"><</span><span class="n"><span style="color:#ff0000">std::money_put</span></span><span class="o"><</span><span class="kt">char</span><span class="o">>></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/getloc.html">oss.getloc()</a></span><span class="p">);</span>
<span class="w"> </span><span class="n">facet</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="n"><a href="../iterator/ostreambuf_iterator.html">std::ostreambuf_iterator</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="p">{</span><span class="n">oss</span><span class="p">},</span><span class="w"> </span><span class="nb">false</span><span class="p">,</span><span class="w"> </span><span class="n">oss</span><span class="p">,</span><span class="w"> </span><span class="sc">' '</span><span class="p">,</span><span class="w"> </span><span class="mf">105623.0L</span><span class="p">);</span>
<span class="w"> </span><span class="n">oss</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="sc">'\n'</span><span class="p">;</span>
<span class="w"> </span><span class="n">facet</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="n"><a href="../iterator/ostreambuf_iterator.html">std::ostreambuf_iterator</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="p">{</span><span class="n">oss</span><span class="p">},</span><span class="w"> </span><span class="nb">false</span><span class="p">,</span><span class="w"> </span><span class="n">oss</span><span class="p">,</span><span class="w"> </span><span class="sc">' '</span><span class="p">,</span><span class="w"> </span><span class="mf">-105623.0L</span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../sstream/basic_ostringstream/str.html">oss.str()</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
</div></p>
<h4>出力</h4>
<p><pre><code>105,623円
-105,623円
</code></pre></p>
<ul>
<li><code><a href="moneypunct/do_frac_digits.html">do_frac_digits()</a></code>が<code>0</code>であるため、引数の値がそのまま円単位の金額として扱われる</li>
</ul>
<h3>ロケールによって通貨を切り替える</h3>
<p>金額の書式は、<code><a href="money_put/put.html">put()</a></code>へ渡すストリームのロケールに設定された<code><a href="moneypunct.html">std::moneypunct</a></code>ファセットから取得される。そのため、名前付きロケールを指定するだけで、同じ値を各国の通貨の書式で出力できる。</p>
<p><div class="yata" id="1b2128593c51150efc62456a4331af47d0803be7"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../iostream.html"><iostream></a></span>
<span class="cp">#include <a href="../sstream.html"><sstream></a></span>
<span class="cp">#include <a href="../locale.html"><locale></a></span>
<span class="cp">#include <a href="../iterator.html"><iterator></a></span>
<span class="cp">#include <a href="../string.html"><string></a></span>
<span class="cp">#include <a href="../stdexcept.html"><stdexcept></a></span>
<span class="c1">// 書式化の処理自体はロケールに依存しない</span>
<span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="nf">format_money</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n"><a href="locale.html">std::locale</a></span><span class="o">&</span><span class="w"> </span><span class="n">loc</span><span class="p">,</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="kt">double</span><span class="w"> </span><span class="n">units</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">ostringstream</span><span class="w"> </span><span class="n">oss</span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../ios/basic_ios/imbue.html">oss.imbue</a></span><span class="p">(</span><span class="n">loc</span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../ios/ios_base/setf.html">oss.setf</a></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/type-fmtflags.html">std::ios_base::showbase</a></span><span class="p">);</span>
<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="k">auto</span><span class="o">&</span><span class="w"> </span><span class="n">facet</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="use_facet.html">std::use_facet</a></span><span class="o"><</span><span class="n"><span style="color:#ff0000">std::money_put</span></span><span class="o"><</span><span class="kt">char</span><span class="o">>></span><span class="p">(</span><span class="n"><a href="../ios/ios_base/getloc.html">oss.getloc()</a></span><span class="p">);</span>
<span class="w"> </span><span class="n">facet</span><span class="p">.</span><span class="n">put</span><span class="p">(</span><span class="n"><a href="../iterator/ostreambuf_iterator.html">std::ostreambuf_iterator</a></span><span class="o"><</span><span class="kt">char</span><span class="o">></span><span class="p">{</span><span class="n">oss</span><span class="p">},</span><span class="w"> </span><span class="nb">false</span><span class="p">,</span><span class="w"> </span><span class="n">oss</span><span class="p">,</span><span class="w"> </span><span class="sc">' '</span><span class="p">,</span><span class="w"> </span><span class="n">units</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n"><a href="../sstream/basic_ostringstream/str.html">oss.str()</a></span><span class="p">;</span>
<span class="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span>
<span class="p">{</span>
<span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="o">*</span><span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="p">{</span><span class="s">"en_US.UTF-8"</span><span class="p">,</span><span class="w"> </span><span class="s">"ja_JP.UTF-8"</span><span class="p">,</span><span class="w"> </span><span class="s">"de_DE.UTF-8"</span><span class="p">})</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">try</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="c1">// 同じ値を、ロケールごとの通貨の書式で出力する</span>
<span class="w"> </span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">format_money</span><span class="p">(</span><span class="n"><a href="locale.html">std::locale</a></span><span class="p">{</span><span class="n">name</span><span class="p">},</span><span class="w"> </span><span class="mf">105623.0L</span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="s">" : "</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">catch</span><span class="w"> </span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../stdexcept.html">std::runtime_error</a></span><span class="o">&</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="c1">// 指定した名前のロケールが利用できない場合</span>
<span class="w"> </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="s">" : not available"</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div>
</div></p>
<h4>出力例</h4>
<p><pre><code>en_US.UTF-8 : $1,056.23
ja_JP.UTF-8 : ￥105,623
de_DE.UTF-8 : 1.056,23 €
</code></pre></p>
<ul>
<li>米ドルとユーロは補助単位を持つため小数点以下2桁で表示され、日本円は<code><a href="moneypunct/frac_digits.html">frac_digits()</a></code>が<code>0</code>であるため<code>105623</code>がそのまま円単位の金額として表示される</li>
<li>ドイツのロケールでは桁区切りと小数点が米国と逆であり、通貨記号は値の後ろに置かれる</li>
<li>妥当なロケール名は<a class="cpprefjp-defined-word" data-desc="処理系定義の動作。処理系によって事前に定めた動作をする" href="../../implementation-compliance.html#dfn-implementation-defined-behavior">処理系定義</a>である。指定した名前のロケールが利用できない場合、<code><a href="locale.html">std::locale</a></code>のコンストラクタは<code><a href="../stdexcept.html">std::runtime_error</a></code>を送出し、上記の例では<code>not available</code>が出力される</li>
</ul>
<h2>バージョン</h2>
<h3>言語</h3>
<ul>
<li>C++98</li>
</ul>
<h2>関連項目</h2>
<ul>
<li><code><a href="money_get.html">money_get</a></code></li>
<li><code><a href="moneypunct.html">moneypunct</a></code></li>
<li><code><a href="money_base.html">money_base</a></code></li>
<li><code><a href="locale.html">locale</a></code></li>
</ul></div>
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