Hi Everyone,
  I am trying to implement a generic sort routine in C/C++.  What I want to
be able to do is given a structure:

struct thing {
  struct thing *next_x;
  struct thing *next_y;
  int x;
  int y;
  };

Be able to write a procedure that I could call like this:

head_x=generic_sort(head_x, [sort by x], [use next_x as pointer] );

I am sure this can be done, but have little idea how to go about it.

Thanks,
Ivan......



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