C++ 如何确定文件夹是否存在以及如何创建文件夹？
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How to find out if a folder exists and how to create a folder?
提问by Sara
I'm trying to create a folder if it doesn't exist. I'm using Windows and I am not interested on my code working in other platforms.
如果文件夹不存在，我正在尝试创建一个文件夹。我使用的是 Windows，我对在其他平台上工作的代码不感兴趣。
Never mind, I found the solution. I was just having a inclusion problem. The answer is:
没关系，我找到了解决方案。我只是遇到了包容性问题。答案是：
#include <io.h> // For access().
#include <sys/types.h> // For stat().
#include <sys/stat.h> // For stat().
#include <iostream>
#include <string>
using namespace std;
string strPath;
cout << "Enter directory to check: ";
cin >> strPath;
if ( access( strPath.c_str(), 0 ) == 0 )
{
struct stat status;
stat( strPath.c_str(), &status );
if ( status.st_mode & S_IFDIR )
{
cout << "The directory exists." << endl;
}
else
{
cout << "The path you entered is a file." << endl;
}
}
else
{
cout << "Path doesn't exist." << endl;
}
采纳答案by Andy Finkenstadt
The POSIX-compatible call is mkdir. Itsilently fails when the directory already exists.
POSIX 兼容调用是mkdir. 当目录已经存在时，它会静默失败。
If you are using the Windows API, then CreateDirectoryis more appropriate.
如果您使用的是 Windows API，那么CreateDirectory更合适。
回答by Alexey Malistov
Use boost::filesystem::existsto check if file exists.
使用boost::filesystem::exists检查文件是否存在。
回答by Mephane
boost::filesystem::create_directoriesdoes just that: Give it a path, and it will create all missing directories in that path.
boost::filesystem::create_directories就是这样做的：给它一个路径，它将在该路径中创建所有丢失的目录。
