19 lines
246 B
Markdown
19 lines
246 B
Markdown
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# Rect::GetTop
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```cpp
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float GetTop() const
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```
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获取矩形上边界。
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**返回：** `float` - 上边界坐标 (y)
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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 top = rect.GetTop(); // 20.0f
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```
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