/in/foo.cc: In function 'int main()':
/in/foo.cc:31:7: warning: unused variable 's' [-Wunused-variable]
   int s=a[x].e;
       ^
/in/foo.cc: In function 'int mycmp(note, note)':
/in/foo.cc:16:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^