/in/foo.cc: In function 'std::__cxx11::string h1(std::__cxx11::string)':
/in/foo.cc:7:10: warning: unused variable 't' [-Wunused-variable]
 {  int i,t;
          ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:33:10: warning: unused variable 't' [-Wunused-variable]
 {  int i,t;
          ^