Compilare: main.cpp: In member function 'void trienode::insereaza(std::string&, int)': main.cpp:24:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 24 | if(s.size()==poz) | ~~~~~~~~^~~~~ main.cpp:30:16: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | if(urm[litera_curenta]==nullptr) | ^~~~~~~~~~~~~~ main.cpp:32:17: warning: array subscript has type 'char' [-Wchar-subscripts] 32 | urm[litera_curenta]=new trienode(); | ^~~~~~~~~~~~~~ main.cpp:34:13: warning: array subscript has type 'char' [-Wchar-subscripts] 34 | urm[litera_curenta]->insereaza(s,poz+1); | ^~~~~~~~~~~~~~ main.cpp: In member function 'void trienode::sterge(std::string&, int)': main.cpp:39:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 39 | if(s.size()==poz) | ~~~~~~~~^~~~~ main.cpp:45:13: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | urm[litera_curenta]->sterge(s,poz+1); | ^~~~~~~~~~~~~~ main.cpp: In member function 'int trienode::nr_aparitii(std::string&, int)': main.cpp:49:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 49 | if(s.size()==poz) | ~~~~~~~~^~~~~ main.cpp:54:16: warning: array subscript has type 'char' [-Wchar-subscripts] 54 | if(urm[litera_curenta]==nullptr) | ^~~~~~~~~~~~~~ main.cpp:58:20: warning: array subscript has type 'char' [-Wchar-subscripts] 58 | return urm[litera_curenta]->nr_aparitii(s,poz+1); | ^~~~~~~~~~~~~~ main.cpp: In member function 'int trienode::lung_prefix(std::string&, int)': main.cpp:67:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 67 | if(s.size()==poz) | ~~~~~~~~^~~~~ main.cpp:71:16: warning: array subscript has type 'char' [-Wchar-subscripts] 71 | if(urm[litera_curenta]==nullptr) | ^~~~~~~~~~~~~~ main.cpp:75:20: warning: array subscript has type 'char' [-Wchar-subscripts] 75 | return urm[litera_curenta]->lung_prefix(s,poz+1); | ^~~~~~~~~~~~~~