C++应用之Boost库-filesystem

#include <iostream>
#include<boost/filesystem.hpp> 

int main()
{
    boost::filesystem::path path("/test/test1"); //初始化 
    boost::filesystem::path old_cpath = boost::filesystem::current_path(); //取得当前程序所在文件夹  
    boost::filesystem::path parent_path = old_cpath.parent_path();//取old_cpath的上一层父文件夹路径 
    boost::filesystem::path file_path = old_cpath / "file"; //path支持重载/运算符
    
    std::cout << path << std::endl;
    std::cout << old_cpath << std::endl;
    std::cout << parent_path << std::endl;
    std::cout << file_path << std::endl;

    if (boost::filesystem::exists(file_path))  //推断文件存在性  
    {
        std::string strPath = file_path.string();
    }
    else
    {
        boost::filesystem::create_directory(file_path);  //文件夹不存在，创建 
    }

    bool bIsDirectory = boost::filesystem::is_directory(file_path); //推断file_path是否为文件夹
    boost::filesystem::recursive_directory_iterator beg_iter(file_path);
    boost::filesystem::recursive_directory_iterator end_iter;
    for (; beg_iter != end_iter; ++beg_iter)
    {
        if (boost::filesystem::is_directory(*beg_iter))
        {
            continue;
        }
        else
        {
            std::string strPath = beg_iter->path().string();  //遍历出来的文件名称
            std::cout << strPath << std::endl;
        }
    }

    boost::filesystem::path new_file_path = file_path / "test.txt";
    if (boost::filesystem::is_regular_file(new_file_path))	//推断是否为普通文件
    {
        int sizefile = boost::filesystem::file_size(new_file_path);  //文件大小(字节)
        std::cout << sizefile << std::endl;
    }
    boost::filesystem::remove(new_file_path);//删除文件new_file_path  

    getchar();
    return 0;
}