In file included from /usr/include/c++/4.4/unordered_map:35, from punctfix.cpp:2: /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. punctfix.cpp:9: error: size of array 'ap' is too large punctfix.cpp: In function 'int main()': punctfix.cpp:16: error: 'ap' was not declared in this scope punctfix.cpp:21: error: 'ap' was not declared in this scope