I'm a beginner user of U++, now I want to use c++ libraries in my application like string, vector and queue , I know their are String and Vector template class in U++, but I need the others.
Nothing stop you to use them. You have to include the proper headers and start using STD classes. They are in std namespace. Using them is as simple as:
#include <vector>
typedef std::vector<int> intVector; // use vector class
intVector int_vec(10); // ...
// ...
Usually is not recommended to mix U++ types with C++ STD types but you are allowed to
If you need more informations please be more specific.