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doc: update docs/cpp.md 292551a8f2
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</span><span class="code-line">marks<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token number">97</span><span class="token punctuation">;</span>
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</span><span class="code-line">marks<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token number">98</span><span class="token punctuation">;</span>
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</span><span class="code-line"><span class="token comment">// 定义和初始化</span>
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</span><span class="code-line">std<span class="token double-colon punctuation">::</span>array<span class="token operator"><</span><span class="token keyword">int</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token operator">></span> <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token number">92</span><span class="token punctuation">,</span> <span class="token number">97</span><span class="token punctuation">,</span> <span class="token number">98</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
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</span><span class="code-line">std<span class="token double-colon punctuation">::</span>array<span class="token operator"><</span><span class="token keyword">int</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token operator">></span> marks <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token number">92</span><span class="token punctuation">,</span> <span class="token number">97</span><span class="token punctuation">,</span> <span class="token number">98</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
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</span><span class="code-line"><span class="token comment">// 有空成员</span>
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</span><span class="code-line">std<span class="token double-colon punctuation">::</span>array<span class="token operator"><</span><span class="token keyword">int</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token operator">></span> marks <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token number">92</span><span class="token punctuation">,</span> <span class="token number">97</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
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</span><span class="code-line">std<span class="token double-colon punctuation">::</span>cout <span class="token operator"><<</span> marks<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token comment">// 输出: 0</span>
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