/in/foo.cc: In function 'std::__cxx11::string getit()':
/in/foo.cc:16:18: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'std::__cxx11::string* {aka std::__cxx11::basic_string<char>*}' [-Wformat=]
  scanf("%s",&tmp3);
                  ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:24:21: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'std::__cxx11::string* {aka std::__cxx11::basic_string<char>*}' [-Wformat=]
   l=scanf("%s",&tmp3);
                     ^