/in/foo.cc: In function 'int main()':
/in/foo.cc:28:13: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'std::string' {aka 'std::__cxx11::basic_string<char>'} [-Wformat=]
   28 |    printf("%s %.1Lf\n", a[i].nam, a[i].sum);
      |            ~^
      |             |
      |             char*