In file included from /usr/include/c++/4.4/unordered_set:35, from sub.cpp:3: /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. sub.cpp:19: error: ISO C++ forbids declaration of 'unordered_set' with no type sub.cpp:19: error: expected ';' before '<' token sub.cpp: In function 'void adauga(Node*, int, int, int, int, std::string&)': sub.cpp:62: error: 'struct Node' has no member named 'Hash' sub.cpp:66: error: 'struct Node' has no member named 'Hash' sub.cpp:68: error: 'struct Node' has no member named 'Hash' sub.cpp: In function 'void cauta(Node*)': sub.cpp:81: error: 'struct Node' has no member named 'Hash' sub.cpp: In function 'int main()': sub.cpp:105: warning: comparison between signed and unsigned integer expressions sub.cpp:115: warning: comparison between signed and unsigned integer expressions