Compilare: main.cpp: In function 'int main()': main.cpp:47:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | while(poz < ec.length()) | ~~~~^~~~~~~~~~~~~ main.cpp:56:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | while(poz < ec.length() && isdigit(ec[poz])) | ~~~~^~~~~~~~~~~~~