9. std::map construction

• Declarations look like this:

  
      map< string, int > mymap;
  
  

• Other constructors for copying, or construction from a range of pairs (e.g. a vector).

  
      vector< pair < string, int > > myvect;
      //...
      map< string, int > mymap2( myvect.begin(), myvect.end() );