Eroare de compilare: main.cpp:12:5: error: ISO C++ forbids declaration of 'nod' with no type [-fpermissive] 12 | nod() | ^~~ main.cpp: In member function 'int Trie_Nod::nod()': main.cpp:17:5: warning: no return statement in function returning non-void [-Wreturn-type] 17 | } | ^ main.cpp: In function 'void op0(std::string)': main.cpp:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'void op1(std::string)': main.cpp:41:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'void op2(std::string)': main.cpp:53:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'void op3(std::string)': main.cpp:70:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for (i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ Non zero exit status: 1