In file included from /usr/include/c++/4.4/unordered_map:35, from patrate.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. patrate.cpp:17: error: '>>' should be '> >' within a nested template argument list patrate.cpp: In function 'int maxPointOnSameLine(std::vector<std::pair<int, int>, std::allocator<std::pair<int, int> > >)': patrate.cpp:26: error: 'unordered_map' was not declared in this scope patrate.cpp:26: error: expected primary-expression before ',' token patrate.cpp:26: error: expected primary-expression before 'int' patrate.cpp:26: error: expected ';' before 'int' patrate.cpp:49: error: 'slopeMap' was not declared in this scope patrate.cpp:58: error: 'slopeMap' was not declared in this scope patrate.cpp: In function 'int main()': patrate.cpp:74: error: 'map' was not declared in this scope patrate.cpp:74: error: expected primary-expression before 'int' patrate.cpp:74: error: expected ';' before 'int' patrate.cpp:75: error: 'm' was not declared in this scope patrate.cpp:75: error: 'p' was not declared in this scope