C++ error: 'unordered_map' does not name a type

Question

I am doing everything correctly as far as I can tell and I have gotten the error message:

error: \'unordered_map\' does not name a type
error: \'mymap\' does         


        

Answer 1

If you want to support for versions older than c++11 use
#include and declare your maps in the form :- std::tr1::unordered_map mymap
which will use the technical report 1 extension for backward compatibility.