如何在路径规格中工作两个点

How do two dots in work in path specifications

本文关键字：两个 工作 路径      更新时间：2023-10-16

在此示例中

#include <iostream>
#include <experimental/filesystem>
namespace fs = std::experimental::filesystem;
int main()
{
    fs::path p = fs::path("..") / ".." / "AppData";//What is it?
    std::cout << "Current path is " << fs::current_path() << 'n'
              << "Canonical path for " << p << " is " << fs::canonical(p) << 'n';
}

什么是".."，它如何工作？

..是父目录，如果您在/home/user/kat中，然后转到..您将在/home/user中。

例如，这样的代码：

fs::path parentPath = fs::current_path() / "..";
std::cout << parentPath << " → " << fs::canonical(parentPath) << std::endl;

将产生此输出（在我的PC上）：

"/home/kamil/Pulpit/build/.." → "/home/kamil/Pulpit"
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