Monsemann
asked on
How to make a calculator?
I want to create a calculator. How can I make a Window where the numbers can be printed. I've tried, but when i press at t.ex. '1' then '2' then '3' it prints 321 ! I want it to print 123 as a regular calculator.
Suggestions?
Suggestions?
what?i can't understand your means?;-(
yep
one of my first projetcs was to write calculator and i used a tedit.
i remember this was also a question of mine when i was new to delphi using buttons for the numbers.
if i remember right just do on the button click:
Edit1.Text:=Edit1.Text + 1 (<- the number)
one of my first projetcs was to write calculator and i used a tedit.
i remember this was also a question of mine when i was new to delphi using buttons for the numbers.
if i remember right just do on the button click:
Edit1.Text:=Edit1.Text + 1 (<- the number)
Hi pall!
Do you use an edit-component as the display of your calculator?
In that case, I assume that your code when you press a button is :
edit1.text := edit1.text + button1.caption;
Have you tried this instead :
edit1.text:=button1.captio
Regards
Batalf
Do you use an edit-component as the display of your calculator?
In that case, I assume that your code when you press a button is :
edit1.text := edit1.text + button1.caption;
Have you tried this instead :
edit1.text:=button1.captio
Regards
Batalf
Unless you need special functionality, why not use a prebuilt calculator. For instance the freeware library called RX has a calculator with source code. As is you can not use it w/o RX. What I did was fixed it so that it works outside of RX.
If this is a possiblity I can email u the RX calc which I cut loose from the RX library.
Let me know
kevin.s.gallagher@state.or
If this is a possiblity I can email u the RX calc which I cut loose from the RX library.
Let me know
kevin.s.gallagher@state.or
if you are new to delphi you can go to places like here:
http://www.torry.ru/math.htm
and get freeware components to either install or read the source code of to see how some stuff is done.
http://www.torry.ru/math.htm
and get freeware components to either install or read the source code of to see how some stuff is done.
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um didnt i just say that.. ?
To Inthe
Sorry
I didn't read what you typed.
My last comment was just a correction of my first, which I wrote when you probably was writing your comment.
I also thought that some explanation could be useful.
Sorry
I didn't read what you typed.
My last comment was just a correction of my first, which I wrote when you probably was writing your comment.
I also thought that some explanation could be useful.
If you use the button caption like Batalf mentioned you could use code like this:
procedure TForm1.ButtonClick(Sender:
begin
edit1.text:= edit1.text + (sender as TButton).caption;
end;
Then make all the click events for the buttons '.', 0, 1, 2... 9 call this procedure.
procedure TForm1.ButtonClick(Sender:
begin
edit1.text:= edit1.text + (sender as TButton).caption;
end;
Then make all the click events for the buttons '.', 0, 1, 2... 9 call this procedure.
My comment above
ASKER
Thank You!
You're an excellent expert!
Monsemann
You're an excellent expert!
Monsemann
Strange decision, I as well as Barry have told the same stuff before Batalf, and you haven't shown any reaction....
ASKER
To 'Lischke'
When I checked the answers to my question today, were all these comments there already. In other words: I recieved them all at the same time!
I had to choose one of the answers.
I don't think You understood my problem (or maybe I didn't understand the answer...). Therfore I rejected Your comment. Then I tryed 'inthe's answer. It didn't work!
'Batalf's answer did work!
Now i know why:
Inthe's command: Edit1.Text + 1
Batalf's command: Edit1.Text + '1'
You can see the difference....
I couldn't give them t.ex. 100 points each - I had to choose.
Therefor I chose the one who gave me the command that worked!
Monsemann
-who is 'Barry'?????
When I checked the answers to my question today, were all these comments there already. In other words: I recieved them all at the same time!
I had to choose one of the answers.
I don't think You understood my problem (or maybe I didn't understand the answer...). Therfore I rejected Your comment. Then I tryed 'inthe's answer. It didn't work!
'Batalf's answer did work!
Now i know why:
Inthe's command: Edit1.Text + 1
Batalf's command: Edit1.Text + '1'
You can see the difference....
I couldn't give them t.ex. 100 points each - I had to choose.
Therefor I chose the one who gave me the command that worked!
Monsemann
-who is 'Barry'?????
inthe
You can also use a string to hold all input of the user by adding each new character to the end of the string. Then use either your own output function or assign the string to a control which can display it (e.g. TLabel.Caption).
Ciao, Mike