/in/foo.cc: In function 'void search()':
/in/foo.cc:44:12: warning: unused variable 't' [-Wunused-variable]
  int now=1,t;
            ^
/in/foo.cc: In function 'int cal(char)':
/in/foo.cc:23:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^