home *** CD-ROM | disk | FTP | other *** search
- {
- This is the test Program that I drew up to test the Procedures in Pete
- Davis' LinkList.Pas posted in the previous message. It could be a little more
- dressed up but it does work and offers some insight, I think, into the use of
- Pointers and linked lists: note that I ran a little manual test to locate a
- designated Pointer in a given list. Here it is:
- }
-
- Uses
- Crt, LinkList;
-
- Var
- AList1, AList2, AList3, AList4 : Data_Ptr;
- ANum : DataType;
- Count : Integer;
-
- begin
- ClrScr;
- Init_List(AList1);
- Writeln('Results of inserting links at the beginning of a list: ');
- For Count := 1 to 20 do
- begin
- ANum := Count;
- Write(' ',ANum);
- Insert_begin(AList1, ANum); {pay out first link (1) to last (20) like}
- {a fishing line With #-cards. You end up}
- end; {with 20 in your hand going up to 1}
- Writeln;
- Writeln('Watch - Last link inserted is the highest number.');
- Writeln('You are paying out the list like reeling out a fishing line,');
- Writeln('Foot 1, Foot 2, Foot 3, etc. - last one is Foot 20.');
- Writeln('Now, mentally reel in the line to the fourth number.');
- Writeln(' ',alist1^.Next_Rec^.Next_Rec^.Next_Rec^.OurData);
- Writeln;
- Writeln('Now insert one additional number at beginning of list');
- begin
- ANum := 21;
- Insert_begin(AList1,ANum);
- end;
- Writeln(' ',AList1^.OurData);
- Writeln;
-
-
- Init_List(Alist2);
- Writeln('Results of Inserting links in turn at the end of a list: ');
- For Count := 1 to 20 do
- begin
- ANum := Count;
- Write(' ',ANum);
- Insert_end(Alist2,ANum);
- end;
- Writeln;
- Writeln('note, just the reverse situation of the process above.');
- Writeln('Reel in the line to the fourth number.');
- Writeln(' ',Alist2^.Next_Rec^.Next_Rec^.Next_Rec^.OurData);
- {We inserted at the end so we are now going out toward the 20}
-
-
-
- Init_List(Alist3);
- Writeln('Results of Inserting links in turn in orDER');
- For Count := 1 to 20 do
- begin
- Anum := Count;
- Write(' ',ANum);
- Insert_In_order(Alist3,ANum);
- end;
- Writeln;
- Writeln(' ',Alist3^.Next_Rec^.Next_Rec^.Next_Rec^.OurData);
-
- end.
- {
- In Case anybody missed Pete Davis' Linklist Unit in the previous
- message but may have it in her/his library (PNL002.ZIP) what I was asking is
- some help With writing code to test the Procedure DELETE_HERE which is the last
- Procedure in the Unit.
- }