EX03: An example containing errors to do with the number of times
      that macros are called.

@O@<ex03.out@>==@{@-
@<Include Files@>
@<Include Files@>
@<Main Program@>
@}

@$@<Main Program@>==@{@-
main()
{
 doit();
}
@}

@$@<Subroutine@>==@{@-
void doit()
{
 int i;
 for (i=0;i<10;i++)
   {
    @<Print@>
    @<Print@>
   }
}@}

@$@<Print@>==@{@-
printf("Hello World!");
printf("\n");@}

@$@<Scan@>==@{scanf@}

@$@<Include Files@>==@{@-
#include <stdio.h>
#include <stdlib.h>@}