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# 第1.5接口 声明接口,Go没有类与继承概念 ``` <pre class="calibre16">``` type writer interface<span class="token2">{</span> <span class="token1">Write</span><span class="token2">(</span><span class="token2">[</span><span class="token2">]</span>byte<span class="token2">)</span> error <span class="token2">}</span> ``` ```