Solved

How to call a function in library code

Posted on 2004-10-14
11
163 Views
Last Modified: 2010-04-05
Dear advisor

The code

library aaaaa ;

Function Total(X, Y: Integer): Integer; stdcall;
begin
   x := ChoiceQuanTiTy(x,y) ;
   Total := x + y ;
end;

Function ChoiceQuanTiTy(X, Y: Integer): Integer; stdcall;
begin
   if X < Y then ChoiceQuanTiTy := X else ChoiceQuanTiTy := Y;
end;

exports
  Total,
  ChoiceQuanTiTy ;
begin
end.

[Error] Project2.dpr(5): Undeclared identifier: 'ChoiceQuanTiTy'

Please correct for me. How to use a function in the same library
0
Comment
Question by:namcit99
[X]
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11 Comments
 
LVL 17

Expert Comment

by:geobul
ID: 12305970
library aaaaa ;

Function ChoiceQuanTiTy(X, Y: Integer): Integer; stdcall;
begin
   if X < Y then ChoiceQuanTiTy := X else ChoiceQuanTiTy := Y;
end;

Function Total(X, Y: Integer): Integer; stdcall;
begin
   x := ChoiceQuanTiTy(x,y) ;
   Total := x + y ;
end;

exports
  Total,
  ChoiceQuanTiTy ;
begin
end.

Regards, Geo
0
 

Author Comment

by:namcit99
ID: 12306029

Any other ways , if we do not consider on position ?
0
 

Author Comment

by:namcit99
ID: 12306048

IF do that, i already know .

Please show me the command to shutdow window. that command for shutdown depends on version of window ?

Or the command to close the active application on window.

Because i want comething to appear when they use my program but not register
0
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LVL 17

Accepted Solution

by:
geobul earned 20 total points
ID: 12306212
library aaaaa ;

Function ChoiceQuanTiTy(X, Y: Integer): Integer; stdcall; forward;

Function Total(X, Y: Integer): Integer; stdcall;
begin
   x := ChoiceQuanTiTy(x,y) ;
   Total := x + y ;
end;

Function ChoiceQuanTiTy(X, Y: Integer): Integer; stdcall;
begin
   if X < Y then ChoiceQuanTiTy := X else ChoiceQuanTiTy := Y;
end;

exports
  Total,
  ChoiceQuanTiTy ;
begin
end.

You should 'consider on position'

Regards, Geo
0
 
LVL 4

Expert Comment

by:Colin_Dawson
ID: 12313513
Position is everything.   Another way, which gets more compliated still....


library aaaaa ;

uses
  Unit1;  //I can't be bothered to think of anything better.

begin
end;




unit Unit1;

interface

Function Total(X, Y: Integer): Integer; stdcall;
Function ChoiceQuanTiTy(X, Y: Integer): Integer; stdcall;

exports
  Total,
  ChoiceQuanTiTy;

implementation

Function Total(X, Y: Integer): Integer;
begin
   x := ChoiceQuanTiTy(x,y) ;
   Total := x + y ;
end;

Function ChoiceQuanTiTy(X, Y: Integer): Integer;
begin
   if X < Y then ChoiceQuanTiTy := X else ChoiceQuanTiTy := Y;
end;

end.


I can't think of any more variations on this theme.  geobul has already covered the others.
0
 

Author Comment

by:namcit99
ID: 12314858

both of answer are good. So how to send the point to both
0
 

Author Comment

by:namcit99
ID: 12315011

I can not see "Split Point"
0
 
LVL 17

Expert Comment

by:geobul
ID: 12316827
Increase question points to 40 and split them. The minimum amount of points which can be assigned to an expert is 20.
0
 
LVL 17

Expert Comment

by:Wim ten Brink
ID: 12319017
Guys... Please use the Result varuable...


library aaaaa ;

Function ChoiceQuanTiTy(X, Y: Integer): Integer; stdcall; forward;

Function Total(X, Y: Integer): Integer; stdcall;
begin
   x := ChoiceQuanTiTy(x,y) ;
   RESULT := x + y ;
end;

Function ChoiceQuanTiTy(X, Y: Integer): Integer; stdcall;
begin
   if X < Y then RESULT := X else RESULT := Y;
end;

exports Total, ChoiceQuanTiTy ;
begin
end.

Borland is different here from the Pascal standard simply because it's a bit more readable. If you use ChoiceQuanTiTy instead of Result, a reader might actually think you're calling the routine again, recursively...

To split points, you need to increase the points for this Q to 40 and split it. The minimum points any expert can get is 20 points. (But my remark is for free!)
0
 
LVL 4

Expert Comment

by:Colin_Dawson
ID: 12324257
my remark was for free too.   I decided not to point out the Result issue, so as not to confuse things.
0
 

Author Comment

by:namcit99
ID: 12335316
thank for all consider

-)
0

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