comp.cpp: In function 'int main()': comp.cpp:19: error: reference to 'cin' is ambiguous comp.cpp:5: error: candidates are: std::ifstream cin /usr/include/c++/4.4/iostream:58: error: std::istream std::cin comp.cpp:19: error: reference to 'cin' is ambiguous comp.cpp:5: error: candidates are: std::ifstream cin /usr/include/c++/4.4/iostream:58: error: std::istream std::cin comp.cpp:24: error: reference to 'cin' is ambiguous comp.cpp:5: error: candidates are: std::ifstream cin /usr/include/c++/4.4/iostream:58: error: std::istream std::cin comp.cpp:24: error: reference to 'cin' is ambiguous comp.cpp:5: error: candidates are: std::ifstream cin /usr/include/c++/4.4/iostream:58: error: std::istream std::cin comp.cpp:69: error: reference to 'cout' is ambiguous comp.cpp:6: error: candidates are: std::ofstream cout /usr/include/c++/4.4/iostream:59: error: std::ostream std::cout comp.cpp:69: error: reference to 'cout' is ambiguous comp.cpp:6: error: candidates are: std::ofstream cout /usr/include/c++/4.4/iostream:59: error: std::ostream std::cout comp.cpp:71: error: reference to 'cout' is ambiguous comp.cpp:6: error: candidates are: std::ofstream cout /usr/include/c++/4.4/iostream:59: error: std::ostream std::cout comp.cpp:71: error: reference to 'cout' is ambiguous comp.cpp:6: error: candidates are: std::ofstream cout /usr/include/c++/4.4/iostream:59: error: std::ostream std::cout