Compilare: user.cpp: In function ‘int convertToInt(std::string&)’: user.cpp:75:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i < str.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:109:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok = false,fu = false; ^ user.cpp:109:21: warning: unused variable ‘fu’ [-Wunused-variable] bool ok = false,fu = false; ^ user.cpp:110:10: warning: unused variable ‘testDone’ [-Wunused-variable] bool testDone = false, parse; ^