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34 lines
1.3 KiB
HTML
34 lines
1.3 KiB
HTML
<p>给定圆的半径和圆心的位置，实现函数 <code>randPoint</code> ，在圆中产生均匀随机点。</p>
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<p>实现 <code>Solution</code> 类:</p>
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<ul>
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<li><code>Solution(double radius, double x_center, double y_center)</code> 用圆的半径 <code>radius</code> 和圆心的位置<code> (x_center, y_center)</code> 初始化对象</li>
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<li><code>randPoint()</code> 返回圆内的一个随机点。圆周上的一点被认为在圆内。答案作为数组返回 <code>[x, y]</code> 。</li>
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</ul>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入:
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</strong>["Solution","randPoint","randPoint","randPoint"]
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[[1.0, 0.0, 0.0], [], [], []]
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<strong>输出: </strong>[null, [-0.02493, -0.38077], [0.82314, 0.38945], [0.36572, 0.17248]]
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<strong>解释:</strong>
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Solution solution = new Solution(1.0, 0.0, 0.0);
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solution.randPoint ();//返回[-0.02493，-0.38077]
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solution.randPoint ();//返回[0.82314,0.38945]
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solution.randPoint ();//返回[0.36572,0.17248]</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>0 < radius <= 10<sup>8</sup></code></li>
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<li><code>-10<sup>7</sup> <= x_center, y_center <= 10<sup>7</sup></code></li>
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<li><code>randPoint</code> 最多被调用 <code>3 * 10<sup>4</sup></code> 次</li>
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</ul>
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