/in/foo.cc: In function 'int main()':
/in/foo.cc:7:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=0;i<n;i++) a[i]=i+1;a[200]=0;
  ^~~
/in/foo.cc:7:28: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for(i=0;i<n;i++) a[i]=i+1;a[200]=0;
                            ^
/in/foo.cc:15:9: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<y;
         ^