Compilare: main.cpp: In function 'int main()': main.cpp:31:9: warning: unused variable 'ok' [-Wunused-variable] 31 | int ok =1; | ^~ main.cpp: In function 'void adaug()': main.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'int sterg(nod*, int)': main.cpp:65:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 65 | if (s.size() == i) | ~~~~~~~~~^~~~ main.cpp:67:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | if (i != s.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'int aparitii()': main.cpp:88:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 88 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'int lungime()': main.cpp:100:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~