Compilare: main.cpp: In function 'int getnr()': main.cpp:20:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | while(pos<s.size() && iscif(s[pos])) | ~~~^~~~~~~~~ main.cpp: In function 'int prod()': main.cpp:45:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | while(pos<s.size() && (s[pos]=='*' || s[pos]=='/')) | ~~~^~~~~~~~~ main.cpp: In function 'int suma()': main.cpp:65:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | while(pos<s.size() && (s[pos]=='+' ||s[pos]=='-')) | ~~~^~~~~~~~~ main.cpp:67:13: warning: variable 'semn' set but not used [-Wunused-but-set-variable] 67 | int semn; | ^~~~