Compilare: main.cpp: In function 'int main()': main.cpp:64:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | while(pos < in.size()-3) | ~~~~^~~~~~~~~~~~~ main.cpp: In function 'void parseNext(int&)': main.cpp:52:15: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized] 52 | coef[index] += sign; | ~~~~~~~~~~~~^~~~~~~