Eroare de compilare: user.cpp: In function ‘int main(int, const char**)’: user.cpp:37: error: no matching function for call to ‘find(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, char)’ user.cpp:53: error: ‘find_if’ was not declared in this scope user.cpp:67: error: ‘atoi’ was not declared in this scope user.cpp:70: error: ‘atoi’ was not declared in this scope user.cpp:94: error: ‘atoi’ was not declared in this scope user.cpp:97: error: ‘atoi’ was not declared in this scope