/in/foo.cc: In function 'int main()':
/in/foo.cc:12:6: error: 'i' was not declared in this scope
  for(i=0; i<n; i++)
      ^
/in/foo.cc:15:6: error: 'i' was not declared in this scope
  for(i=0; i<n; i++)
      ^
/in/foo.cc: In function 'int f(int*, int, int)':
/in/foo.cc:33:6: error: 'i' was not declared in this scope
  for(i=0; i<n; i++)
      ^