linux/windows copy and create destination dir if it does not exist (c++)

linux

mkdir -p "$d" && cp file "$d"

windows

xcopy file.txt c:\new\path\file.txt*

/y overwrite

* -> file

c++

//std::string command = "xcopy file.txt c:\\new\\path\\file.txt*";
std::ostringstream oss;
oss << "xcopy " <<"\""<<entry.path().string() << "\"" << " " << destanation << "*"; // prevent space in source path
std::string command = oss.str();
system(command.c_str());