Solved

Parameters

Posted on 2002-05-20
4
165 Views
Last Modified: 2010-04-04
I have a function which accepts two string and two integer parameters. when i trace through the program the two strings and one of the integers is working properly however the last integer seems to be reset before passing back. so for example i am passing it one large string

passstring:='Tank 1 has 27 Litres'

I am spliting the string into two one passing 'Tank' and the other 'Litres'
i am passing back the tank number '1' as an integer but when i pass the result of 27 back the function deletes it before passing back. I have followed every step with watches and have even added a line v(set as a temp integer) = 27 and tried to pass it back but as soon as the code gets to total:=v the watch not only  declaires total as empty but also the variable v (i have declaired var total :integer in the function). Can anyone help  

PS i am using Delphi 5 and Windows 98
0
Comment
Question by:alshepstone
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 1

Expert Comment

by:MBo
ID: 7021595
some code required...
0
 
LVL 8

Accepted Solution

by:
Cesario earned 50 total points
ID: 7021705
Ok try this function :

Procedure ParseString(S:String; Var S1,S2:String; VAR Int1,int2:Integer);
VAR
 ms: TMemoryStream;
begin

  ms := tMemoryStream.Create;
  ms.Write ( s[1],Length(s));
  ms.position :=0;

  With tParser.Create ( ms ) DO
  Try
    S1 := TokenString;
    NextToken;
    Int1 := TokenInt;
    NextToken;
    S2 := TokenString;
    NextToken;
    Int2 := TokenInt;
  Finally
    free;
  End;

end;


procedure TForm1.Button1Click(Sender: TObject);
VAR
  s1,s2: String;
  v1,V2: Integer;
begin
  ParseString ( 'Tank 1 has 27 Litres',s1,s2,v1,v2);
  ShowMessage ( S1+#13+IntToStr(v1)+#13+S2+#13+IntTostr(v2));
end;
0
 
LVL 1

Expert Comment

by:Dumani
ID: 7023402
procedure TForm1.Button1Click(Sender: TObject);
var
  i: integer;
begin
  with TStringList.Create do
  try
    Text := StringReplace('Tank 1 has 27 Litres', '', #13#10, [rfReplaceAll]);
    for i := 0 to Count - 1 do
    begin
{
      Strings[i] := Trim(Strings[i]);
      you can also use this to trim before you check...

      Strings[0] is Tank
      Strings[1] is 1
      Strings[2] is has
      Strings[3] is 27
      Strings[4] is Litres
}
    end;
  finally
    Free;
  end;
end;
0
 
LVL 4

Expert Comment

by:jsweby
ID: 7026504
Is it possible that there is a call inside your function to another procedure or function that could be changing the value of the passed parameter v?

As MBo said, this would be much easier with the code of your function.

J.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Working with hours 3 74
Dev express lookupcombo 3 45
Multi-layered image in FireMonkey 9 67
Typecasting TBytes to Integer in Delphi XE8 2 35
This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question