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