cppreference.com > C++ Multisets > Container constructors & destructors Container constructors & destructors Syntax:
      #include <set>
      container();
      container( const container& c );
      ~container();
Every multiset has a default constructor, copy constructor, and destructor. The default constructor takes no arguments, creates a new instance of that multiset, and runs in constant time. The default copy constructor runs in linear time and can be used to create a new multiset that is a copy of the given multiset c. The default destructor is called when the multiset should be destroyed. For example, the following code creates a pointer to a vector of integers and then uses the default multiset constructor to allocate a memory for a new vector:
     vector<int>* v;
     v = new vector<int>();
Related topics: (C++ Strings) resize