Compilare: main.cpp: In function 'myset parseEquation(std::string&, int&)': main.cpp:92:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | while(pos < str.size() && str[pos] != ')') | ~~~~^~~~~~~~~~~~