Compilare: main.cpp: In function 'Retea expresie()': main.cpp:72:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | while(pos < str.size() && str[pos] == 'S'){ | ~~~~^~~~~~~~~~~~ main.cpp: In function 'Retea termen()': main.cpp:81:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | while(pos < str.size() && str[pos] == 'P'){ | ~~~~^~~~~~~~~~~~