C++ boost::filesystem 相对路径和当前目录？
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boost::filesystem relative path and current directory?
提问by Jake
How can I use boost::filesystem::pathto specify a relative path on Windows? This attempt fails:
如何boost::filesystem::path在 Windows 上指定相对路径？此尝试失败：
boost:filesystem::path full_path("../asset/toolbox"); // invalid path or directory.
Maybe to help me debug, how to get the current working directory with boost::filesystem?
也许是为了帮助我调试，如何使用 boost::filesystem 获取当前工作目录？
回答by hmuelner
getcwd = boost::filesystem::path full_path(boost::filesystem::current_path());
Example:
例子：
boost::filesystem::path full_path(boost::filesystem::current_path());
std::cout << "Current path is : " << full_path << std::endl;
To access current_pathone needs to add #include <boost/filesystem.hpp>.
要访问current_path一个需要添加#include <boost/filesystem.hpp>.
回答by ulidtko
Try the system_completefunction.
试试这个system_complete功能。
namespace fs = boost::filesystem;
fs::path full_path = fs::system_complete("../asset/toolbox");
This mimics exactly how the OS itself would resolve relative paths.
这准确地模仿了操作系统本身如何解析相对路径。
回答by serup
If you want to change to previous directory then try something like this:
如果要更改到上一个目录，请尝试以下操作：
boost::filesystem::path full_path( boost::filesystem::current_path() );
std::cout << "Current path is : " << full_path << std::endl;
//system("cd ../"); // change to previous dir -- this is NOT working
chdir("../"); // change to previous dir -- this IS working
boost::filesystem::path new_full_path( boost::filesystem::current_path() );
std::cout << "Current path is : " << new_full_path << std::endl;
回答by Midnighter
When you type "../your/path" aren't you specifying a unix-like path? I think what you should do to get system specific paths is:
当您输入“../your/path”时，您不是指定了一个类 Unix 路径吗？我认为你应该怎么做才能获得系统特定的路径：
boost:filesystem::path full_path(".." / "asset" / "toolbox");
In this case the '/' is an operator concatenating paths in a system specific way and is not part of the path that you specify.
在这种情况下，“/”是以系统特定方式连接路径的运算符，而不是您指定的路径的一部分。
