/in/foo.cc: In function 'long int gethash(std::string)':
/in/foo.cc:10:12: warning: unused variable 't' [-Wunused-variable]
   10 |     int i, t, j, l;
      |            ^
/in/foo.cc:10:15: warning: unused variable 'j' [-Wunused-variable]
   10 |     int i, t, j, l;
      |               ^