Compilare: user.cpp: In function ‘void GetWords(std::string&)’: user.cpp:24:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < line.size()) ^ user.cpp:28:66: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (SEP.find(line[j]) != std::string::npos && j < line.size()) ^ user.cpp:30:66: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (SEP.find(line[j]) == std::string::npos && j < line.size()) ^ user.cpp: In function ‘void Dynamic()’: user.cpp:88:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v.size() ; ++i) ^ user.cpp:89:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = i + 1 ; j < v.size() ; ++j) ^ user.cpp:93:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = i + 1 ; j < v.size() ; ++j) ^