- Fix link resolution with proper relative/absolute path handling - Improve link styling with underline decoration - Hide leaf nodes from tree, only show directories - Fix log file path for packaged app
44 lines
1.3 KiB
Markdown
44 lines
1.3 KiB
Markdown
# String::Substring
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```cpp
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String Substring(SizeType pos, SizeType len = npos) const;
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```
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返回从位置 `pos` 开始、长度为 `len` 的子字符串。如果 `len` 省略或为 `npos`,则返回从 `pos` 到字符串末尾的所有字符。
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**参数:**
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- `pos` - 子字符串的起始位置(从 0 开始)
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- `len` - 子字符串的长度,默认为 `npos`(即到字符串末尾)
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**返回:** 新的 String 对象,包含指定的子字符串
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**复杂度:** O(n),其中 n 为子字符串的长度
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**示例:**
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```cpp
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#include "XCEngine/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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XCEngine::Containers::String sub1 = s.Substring(6); // 从位置6到末尾
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std::cout << sub1.CStr() << std::endl; // 输出: World
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XCEngine::Containers::String sub2 = s.Substring(6, 5); // 从位置6开始,长度5
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std::cout << sub2.CStr() << std::endl; // 输出: World
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XCEngine::Containers::String sub3 = s.Substring(0, 5); // 从位置0开始,长度5
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std::cout << sub3.CStr() << std::endl; // 输出: Hello
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XCEngine::Containers::String sub4 = s.Substring(6, 100); // len超过剩余长度,自动截断
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std::cout << sub4.CStr() << std::endl; // 输出: World
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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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