[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

Parameters

Posted on 2002-05-20
4
Medium Priority
?
170 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
4 Comments
 
LVL 1

Expert Comment

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

Accepted Solution

by:
Cesario earned 200 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

[Webinar] Kill tickets & tabs using PowerShell

Are you tired of cycling through the same browser tabs everyday to close the same repetitive tickets? In this webinar JumpCloud will show how you can leverage RESTful APIs to build your own PowerShell modules to kill tickets & tabs using the PowerShell command Invoke-RestMethod.

Question has a verified solution.

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

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
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…
This video tutorial shows you the steps to go through to set up what I believe to be the best email app on the android platform to read Exchange mail.  Get the app on your phone: The first step is to make sure you have the Samsung Email app on your …
Get the source code for a fully functional Access application shell with several popular security features that Access VBA application developers desire, but find difficult or impossible to figure out how to code. You get the source code for managi…
Suggested Courses
Course of the Month10 days, 20 hours left to enroll

612 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