Compilare: user.cpp: In member function ‘void trie::adaug_from_b(std::string&, int)’: user.cpp:26:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = pos; i < a.size(); ++i) ^ user.cpp: In member function ‘void trie::adauga_din_a(std::string&, int, int)’: user.cpp:39:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=pos; i < a.size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:74:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz = 0; poz < aux.size() ; ++poz) ^ user.cpp:80:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz = 0; poz < A[i].size() ; ++poz) ^