In file included from /usr/include/c++/4.4/unordered_map:35, from johnie.cpp:7: /usr/include/c++/4.4/c++0x_warning.h:31:2: error: #error This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options. johnie.cpp:13: error: '>>' should be '> >' within a nested template argument list johnie.cpp: In function 'int main()': johnie.cpp:56: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:56: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:57: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:57: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:77: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:77: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:78: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:78: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x johnie.cpp:118: warning: statement has no effect