/in/foo.cc: In function 'int main()':
/in/foo.cc:17:10: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   out2[x]=i;
   ~~~~~~~^~
/in/foo.cc:11:10: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   out1[i]=y;
   ~~~~~~~^~