In file included from /usr/include/c++/4.4/unordered_map:35, from pikachu.cpp:15: /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. pikachu.cpp:52: error: ISO C++ forbids initialization of member 'lg' pikachu.cpp:52: error: making 'lg' static pikachu.cpp:52: error: ISO C++ forbids in-class initialization of non-const static member 'lg' pikachu.cpp: In function 'void read()': pikachu.cpp:148: error: expected primary-expression before '[' token pikachu.cpp:148: error: expected primary-expression before ']' token pikachu.cpp:148: error: expected primary-expression before 'int' pikachu.cpp:148: error: expected primary-expression before 'int'