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22 lines
573 B
HTML
22 lines
573 B
HTML
<p>配对交换。编写程序,交换某个整数的奇数位和偶数位,尽量使用较少的指令(也就是说,位0与位1交换,位2与位3交换,以此类推)。</p>
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<p> <strong>示例1:</strong></p>
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<pre>
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<strong> 输入</strong>:num = 2(或者0b10)
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<strong> 输出</strong> 1 (或者 0b01)
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</pre>
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<p> <strong>示例2:</strong></p>
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<pre>
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<strong> 输入</strong>:num = 3
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<strong> 输出</strong>:3
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</pre>
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<p> <strong>提示:</strong></p>
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<ol>
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<li><code>num</code>的范围在[0, 2^30 - 1]之间,不会发生整数溢出。</li>
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</ol>
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