Compilare: main.cpp: In function 'int expresie()': main.cpp:14:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | while(i<s.size()) | ~^~~~~~~~~ main.cpp: In function 'int expresie3()': main.cpp:64:1: warning: control reaches end of non-void function [-Wreturn-type] 64 | } | ^