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> Ajutor! Java! nu ma lasati fratilor...

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Slider
post 21 Jun 2008, 09:46
Post #1


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From: Cernavoda
Se da urmatorul program:

public class Test {
static int n=valoare;
static int f(int x){
if(x>n) return 0;
else return x+f(x+2);}
public static void main(String []args){
System.out.println(f(2));
}}

Ce valoare trebuie sa primeasca n pentr uca programul sa afiseze 20?
Raspunsul este 8

L-am rulat si din aproape in aproape am gasit! 8
Problema este ca ar fi trebuit sa rezolv problema fara a rula programul...
Imi poate explica cineva algoritmul? nu reusesc sa inteleg programul...


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Sony
post 21 Jun 2008, 10:56
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Bre, ti-am zis sa o lasi naibii de facultate la varsta asta! 243.gif


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Slider
post 21 Jun 2008, 11:08
Post #3


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Ce draq sa mai fac acu'? ca am scapat de un an...mai am examenu' asta si gata!


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Sony
post 21 Jun 2008, 11:19
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Atunci tine-te de ea! wink.gif


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Slider
post 21 Jun 2008, 11:21
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Phiii chiar nu se pricepe nimeni? mama ei de programare...si astia nu au gasit decat java....un Basic ceva acolo n'au gasit... blush.gif

This post has been edited by Slider: 21 Jun 2008, 11:22


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Sony
post 21 Jun 2008, 11:33
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Bre, e sambata. Cred ca abia luni vei gasi pe cineva sa iti scrie la obiect, nu sa abereze ca mine.

21 Jun 2008, 12:33:
La Basic te ajutam io. 04.gif

This post has been edited by Sony: 21 Jun 2008, 11:33


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radian
post 21 Jun 2008, 12:15
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gandeste pozitiv: nu spera si nu ai teama...


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QUOTE(Sony @ 21 Jun 2008, 11:33)
...nu sa abereze ca mine...
*



Hmmm, atata sinceritate... Asta-i de pus in rama! radmasa.gif


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Shush
post 21 Jun 2008, 12:33
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Pai tu ai functia f(x) cu urmatoarele cazuri f(x)=0 pentru x>n si f(x)=2+f(x+2) in rest.
Tu vrei ca valaorea functiei sa fie 20. Primul apel al functiei va fi f(2);
f(2)=2+f(4)=2+4+f(6)=6+6+f(8)=12+8+f(10)=20+f(10) => f(10) trebuie sa fie egal cu 0 => functia trebuie sa lucreze pentru 8 dar nu si pentru 10 => n=8

Atasez si programul cu fiecare linie comentata : Attached File  prog.txt ( 832bytes ) Number of downloads: 34


This post has been edited by Shush: 21 Jun 2008, 12:34


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post 21 Jun 2008, 16:34
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aaaa...mersi mult! mie maine imi trebuia. ok ma apuc de studiat!


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koldun
post 21 Jun 2008, 17:02
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un om


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De ti-o trebui, bine, de nu...
[attachmentid=1627456525]

Succese! wink.gif


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Slider
post 23 Jun 2008, 09:41
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Multumesc!


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bj
post 23 Jun 2008, 10:11
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ca sa intelegi logica functiei cauta documentatie despre recursivitate wink.gif


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post 23 Jun 2008, 21:11
Post #13


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A trecut! am scapat!!! smile.gif


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Shush
post 23 Jun 2008, 22:34
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Bravo !


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