19 lines
267 B
Markdown
19 lines
267 B
Markdown
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# Rect::GetBottom
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```cpp
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float GetBottom() const
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```
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获取矩形下边界。
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**返回：** `float` - 下边界坐标 (y + height)
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**复杂度：** O(1)
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**示例：**
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```cpp
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Rect rect(10.0f, 20.0f, 100.0f, 50.0f);
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float bottom = rect.GetBottom(); // 70.0f
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```
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