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    <title>0.1 + 0.2 为什么不等于 0.3：从手算到二进制编码</title>
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    <description>计算机连 0.1 + 0.2 都算不对？本文从乘 2 取整开始，亲手制造一次浮点误差，再用 Python struct.pack 拍下数字在内存里的真实模样。</description>
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    <description>0x9a 不仅仅是一个十六进制数。它在 Windows-1252 编码中对应着字符 'š'，代表了标准边缘的隐喻。本文讲述了这个数字背后的技术细节与设计灵感。</description>
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