/in/foo.cc: In function 'int main()':
/in/foo.cc:22:67: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'std::__cxx11::string* {aka std::__cxx11::basic_string<char>*}' [-Wformat=]
  printf("%s\n%d\n%d", student[mid].name, student[mid].total, score);
                                                                   ^