/in/foo.cc: In function 'int main()':
/in/foo.cc:9:2: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
  while(cin>>a[++n]);n--;
  ^~~~~
/in/foo.cc:9:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
  while(cin>>a[++n]);n--;
                     ^