Compilare: main.cpp: In function 'std::string eval()': main.cpp:13:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | while ( poz < s.size () ) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:68:9: warning: unused variable 'n' [-Wunused-variable] 68 | int n; | ^