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39 lines
693 B
Markdown
39 lines
693 B
Markdown
# Array::PopBack()
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```cpp
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void PopBack();
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```
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移除数组末尾的元素，并调用其析构函数。
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**前置条件：** 数组必须非空（`Size() > 0`）。如果数组为空，行为未定义。
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**行为：**
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- 将 `Size()` 减 1
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- 调用被移除元素的析构函数
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- **不释放底层内存**
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**线程安全：** ❌ 操作期间不可并发访问
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**示例：**
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```cpp
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Containers::Array<int> arr = {10, 20, 30, 40, 50};
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arr.Size(); // 5
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arr.PopBack(); // 移除 50
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arr.Size(); // 4
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// arr = {10, 20, 30, 40}
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arr.PopBack();
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arr.PopBack();
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// arr = {10, 20}
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// Capacity() 仍为之前的值（如 8）
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```
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## 相关文档
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- [Array 总览](array.md) - 返回类总览
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