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Update number_encoding.md #1306

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2 changes: 1 addition & 1 deletion docs/chapter_data_structure/number_encoding.md
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首先需要指出，**数字是以“补码”的形式存储在计算机中的**。在分析这样做的原因之前，首先给出三者的定义。

- **原码**：我们将数字的二进制表示的最高位视为符号位，其中 $0$ 表示正数，$1$ 表示负数，其余位表示数字的值。
- **原码**：我们将数字的二进制表示的最高位视为符号位，其中 $0$ 表示正数，$1$ 表示负数，其余位表示数字的值（即绝对值的二进制）。
- **反码**：正数的反码与其原码相同，负数的反码是对其原码除符号位外的所有位取反。
- **补码**：正数的补码与其原码相同，负数的补码是在其反码的基础上加 $1$ 。

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