/in/foo.cc: In function 'int calcs(int, int)':
/in/foo.cc:33:13: warning: value computed is not used [-Wunused-value]
   calcs(x,n)+calcs(0,y);
   ~~~~~~~~~~^~~~~~~~~~~
/in/foo.cc:34:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^