/in/foo.cc: In function 'int main()':
/in/foo.cc:12:17: warning: iteration 6 invokes undefined behavior [-Waggressive-loop-optimizations]
   if(a[i]> a[i+1])
            ~~~~~^
/in/foo.cc:10:17: note: within this loop
  for(int i = 0;i<7;i++)
                ~^~
/in/foo.cc:21:19: warning: 'in' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<ax<<" "<<in;
                   ^
/in/foo.cc:21:12: warning: 'ax' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<ax<<" "<<in;
            ^~~