40 lines
911 B
Markdown
40 lines
911 B
Markdown
# String::Clear
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```cpp
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void Clear();
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```
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清空字符串内容，将长度设为 0，但不释放已分配的内存。
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**参数：** 无
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**返回：** 无
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**复杂度：** O(1)
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**示例：**
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```cpp
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#include "XCEngine/Core/Containers/String.h"
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#include <iostream>
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int main() {
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XCEngine::Containers::String s("Hello World");
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std::cout << "Before clear - Length: " << s.Length()
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<< ", Capacity: " << s.Capacity() << std::endl;
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// 输出: Before clear - Length: 11, Capacity: 12
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s.Clear();
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std::cout << "After clear - Length: " << s.Length()
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<< ", Capacity: " << s.Capacity() << std::endl;
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// 输出: After clear - Length: 0, Capacity: 12
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std::cout << "Empty: " << s.Empty() << std::endl; // 输出: Empty: 1
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return 0;
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}
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```
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## 相关文档
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- [String 总览](string.md) - 返回类总览
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- [Reserve / Resize](reserve-resize.md) - 内存管理
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