Yep - integer division truncates.
--- Tim Nicholson <[EMAIL PROTECTED]> wrote:
> Stefan,
>
> thanks for that help. I actually managed to figure out that I had an
> infinite loop after a while and I did it by sticking in a println("what is
> happening here ?") statement just inside the opening bcurly bracket of thw
> while loop and then when I did that and then executed the program, an
> inifinte number of "what is happening here ?" statements in my output. So
> that gave me the clue that I didn't increment or adjust the variable that
> affected my condition of my while loop.
>
> So I eventually figured that part out. The part that I didnt figure out was
> the problem that I had afterwards when my output gave me a value that wasn't
> quite right.
>
> But somoene suggested to me that that may be due to using integer arithmetic
> rather than double or float arithmetic. So tomorrow I am going to try that
> and see if that improves things.
>
> ScreenWriter and KeyboardReader are part of the
>
> TerminalIO.* package that comes along with the Lambert and Osborne book --
> Java a Framework for Programming and Problem Solving.
>
>
>
>
> ----- Original Message -----
> From: "Stefan Carlsson" <[EMAIL PROTECTED]>
> To: "JDJList" <[EMAIL PROTECTED]>
> Sent: Monday, September 23, 2002 8:39 PM
> Subject: [jdjlist] SV: having a problem that I can't understand....
>
>
>
> Well... haven't give your calculations any thought
> (guess you know what you are doing...), but first
> you must increse your variable "i" (like i++) somewhere
> within your while -loop, or your will never get out
> of that scoop. Also, perhaps you must "flush();" your
> ScreenWriter (?). Don't know if it works like the
> "OutputSreamWriter" -class ?, which must bee flushed
> to print anything (default). Is "ScreenWriter" part
> of jdk 1.4 ?
>
> Regards
> stefan
>
>
>
> -----Ursprungligt meddelande-----
> Fr�n: Tim Nicholson [mailto:[EMAIL PROTECTED]]
> Skickat: den 22 september 2002 15:52
> Till: JDJList
> �mne: [jdjlist] having a problem that I can't understand....
>
>
> Hi,
>
> can somebody please help me ?
>
> I am trying to run the following code :-
>
>
> ----------------------------------------------------------------------------
> -------------
> import TerminalIO.*;
>
> public class Liebniz {
>
> KeyboardReader reader = new KeyboardReader();
> ScreenWriter writer = new ScreenWriter();
>
> int i;
> int x;
> int numiter;
> double valuesofar;
>
> //================================================================
> public void run() {
>
>
> numiter = reader.readInt("Enter number iterations for Pi value: ");
>
>
> i = 1;
> x = 1;
> valuesofar = 0;
>
> while (i <= numiter) {
>
> if(i % 2 == 0){
> valuesofar = valuesofar - (1 / x);
> }
> else {
> valuesofar = valuesofar + (1 / x);
> }
>
> x = x + 2;
>
> }
>
> writer.println("The value so far is: " + valuesofar);
>
>
> }
>
> //=================================================================
> public static void main(String [] args) {
> Liebniz tpo = new Liebniz();
> tpo.run();
> }
> }
>
> ----------------------------------------------------------------------------
> ---------------------
>
>
> And when I execute it, it succeeds in asking me to enter a number of
> iterations but then after I have entered in an integer and push enter,
> nothing more happens. In other words it only gets as far as
> the cursor going onto the next line. But nothing more happens.
>
> So it doesnt display any output to my input.
> The cursor just goes to the next line and stops and I have to push the X
> button in the top right hand corner of the window to get it to close. What
> usually happens is that it runs its output and then says "push any key to
> continue " but when I try this program it doesnt do any of that. It just
> sits on the next line after I have entered my input and it doesnt display
> anything more.
>
> Can someone please help me with this ?
>
> I get no compile errors by the way with this.
>
> The program is also attached as a .java file if that makes things any easier
> ?
>
>
>
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>
>
>
>
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=====
Mark Zawadzki Performance Engineer/DBA/Programmer extraordinaire� [EMAIL PROTECTED]
[EMAIL PROTECTED]
"Democracies die behind closed doors," - Judge Damon Keith
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