Compilare: main.cpp: In function 'int main()': main.cpp:54:15: warning: variable 'root' set but not used [-Wunused-but-set-variable] 54 | Retea root = expresie(); | ^~~~ main.cpp: In function 'Retea expresie()': main.cpp:61:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | while(pos < str.size() && str[pos] == 'S'){ | ~~~~^~~~~~~~~~~~ main.cpp: In function 'Retea termen()': main.cpp:70:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | while(pos < str.size() && str[pos] == 'P'){ | ~~~~^~~~~~~~~~~~