#include 
     
      #include 
      
       using namespace std;int main(){    int pid = GetCurrentProcessId();    auto path = Plug::GetCurrentPath();//返回std::wstring    path += L"test.txt";    auto file = _wfopen(path.c_str(), L"wb");//写或者新建一个二进制文件    char buf[10] = {
   0};    itoa(pid, buf, 10);    fwrite(buf, 6, 1, file);//arg2:单个字节数,arg3:写入的个数,arg4:目标文件指针    fclose(file);    getchar();    return 0;}
      
     

感觉没有c++fstream方便