Compilare: main.cpp: In function 'int main()': main.cpp:16:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | while (pozitie < str.size()) { | ~~~~~~~~^~~~~~~~~~~~ main.cpp:20:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | while (pozitie < str.size() && !litera(str[pozitie])) { | ~~~~~~~~^~~~~~~~~~~~ main.cpp:23:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | while (pozitie < str.size() && litera(str[pozitie])) { | ~~~~~~~~^~~~~~~~~~~~