EX06: An example in which Pascal program text is rearranged to form an ADT.
      This example achieves what EX05 does, but without additive macros.

@!******************************

@O@<ex06.out@>==@{@-
program adt(input,output);
@<Types@>
@<Variables@>
@<Procedures@>
begin startproc; end.
@}

@$@<Types@>==@{@-
@<Buffer type@>
@<Complex type@>
@}

@$@<Variables@>==@{@-
@<Buffer variable@>
@}

@$@<Procedures@>==@{@-
@<Buffer procedures@>
@<Complex procedures@>
@}

@!******************************

@$@<Buffer type@>==@{@-
type buffer_type = record
                   length : integer;
                   buf : array[1..100] of char;
                   end;
@}

@$@<Buffer variable@>==@{@-
bigbuf : buffer_type;
@}

@$@<Buffer procedures@>==@{@-
procedure buf_init(var b : buffer_type) {Body of buf_init}
procedure buf_add(var b : buffer_type; ch : char) {Body of buf_add}
procedure buf_get(var b : buffer_type; var ch : char) {Body of buf_get}
@}

@!******************************

@$@<Complex type@>==@{@-
type complex_type = record r,i : real; end;
@}

@$@<Complex procedures@>+=@{@-
procedure cm_set(var c: complex_type; a,b : real)  {Body of cm_set}
procedure cm_add(a,b : complex_type; var c: complex_type) {Body of cm_add}
{Other procedures and functions}
@}