<p data-line="0" class="code-line">以下を設置。2つの違いはいつか調べる。</p>
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<div class="code-block-filename-container"><span class="code-block-filename"> compile_flags.txt</span></div>
<pre class="shiki github-dark" style="background-color:#151e2c;color:#e1e4e8"><code class="code-line" data-line="2"><span class="line"><span>-std=c++20</span></span>
<span class="line"><span></span></span></code></pre>
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<div class="code-block-filename-container"><span class="code-block-filename">.clangd</span></div>
<pre class="shiki github-dark" style="background-color:#151e2c;color:#e1e4e8"><code class="code-line" data-line="6"><span class="line"><span>CompileFlags:</span></span>
<span class="line"><span>  Add: [-std=c++20]</span></span>
<span class="line"><span></span></span></code></pre>
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clnagdにc++のversionを明示する

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