#include <library.h>

/*
     The previous version almost worked properly, but it never stopped.

     The reason is that this

        void do_it_this_many_times(const int N)
        { do_it_once();
          do_it_this_many_times(N - 1); }

     isn't always the correct way to do something N times.

     How do you do something zero? Do you do it once, then do it another
     -1 times? No, you just do nothing at all.
*/


void do_it_once()
{ print("I will not be late for class");
  new_line(); }

void do_it_this_many_times(int N)
{ if (N > 0)
  { do_it_once();
    do_it_this_many_times(N - 1); } }

void main()
{ do_it_this_many_times(100); }



/*
     This version would be just as good. Some may even prefer it

        void do_it_this_many_times(const int N)
        { do_it_once();
          if (N > 1)
            do_it_this_many_times(N - 1); }

     or how about

        void do_it_this_many_times(const int N)
        { do_it_once();
          const int how_many_more_times = N - 1;
          if (how_many_more_times != 0)
            do_it_this_many_times(how_many_more_times); }
*/