详解C++ 创建文件夹的四种方式

#include <iostream>
using namespace std;

int main()
{
    string folderPath = "E:\\database\\testFolder"; 

    string command;
    command = "mkdir -p " + folderPath;  
    system(command.c_str());

    return 0;
}

#include <direct.h>
#include <iostream>
using namespace std;

int main()
{
    string folderPath = "E:\\database\\testFolder"; 

    if (0 != access(folderPath.c_str(), 0))
    {
        // if this folder not exist, create a new one.
        mkdir(folderPath.c_str());   // 返回 0 表示创建成功，-1 表示失败
        //换成 ::_mkdir  ::_access 也行，不知道什么意思
    }

    return 0;
}

#include <windows.h>
#include <iostream>
using namespace std;

int main()
{
    string folderPath = "E:\\database\\testFolder"; 

    if (!GetFileAttributesA(folderPath.c_str()) & FILE_ATTRIBUTE_DIRECTORY) {
        bool flag = CreateDirectory(folderPath.c_str(), NULL);
        // flag 为 true 说明创建成功
    } else {
        cout<<"Directory already exists."<<endl;
    }

    return 0;
}

#include <iostream>
#include <shlwapi.h>
using namespace std;

int main()
{
    string folderPath = "E:\\database\\testFolder"; 

    if (!PathIsDirectory(folderPath.c_str()))  // 是否有重名文件夹
    {
        ::CreateDirectory(folderPath.c_str(), 0);
    }

    return 0;
}