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cant get my radix sort working:(
Andrew Hodel
Greenhorn
Joined: Apr 04, 2013
Posts: 10
posted
Apr 04, 2013 00:38:10
0
i need to write code to sort an arbitrary number of digits and random values. my code as of now just replaces the first position with the last position!
ive been working at this all day and just cant figure out where its bugging out. please help
import java.util.LinkedList; import java.util.Scanner; public class pt2 { int[] mine; int digits; Scanner sn = new Scanner(System.in); public pt2() { makeArray(); add(); } @SuppressWarnings({ "unchecked", "rawtypes" }) void RADIX(int[] kiki, int digi){ while(digi<=digits){ LinkedList<Integer> l0 = new LinkedList<Integer>(); LinkedList<Integer> l1 = new LinkedList<Integer>(); LinkedList<Integer> l2 = new LinkedList<Integer>(); LinkedList<Integer> l3 = new LinkedList<Integer>(); LinkedList<Integer> l4 = new LinkedList<Integer>(); LinkedList<Integer> l5 = new LinkedList<Integer>(); LinkedList<Integer> l6 = new LinkedList<Integer>(); LinkedList<Integer> l7 = new LinkedList<Integer>(); LinkedList<Integer> l8 = new LinkedList<Integer>(); LinkedList<Integer> l9 = new LinkedList<Integer>(); LinkedList[] cap ={l0,l1,l2,l3,l4,l5,l6,l7,l8,l9}; for( int j=0;j<kiki.length;j++){ int k=0; while(k<10){ //need to put the number in the correct LL but how int jk = digital(kiki[j],(int)(Math.pow(10,digi))); if(jk==k){ cap[k].add(kiki[j]); k=11; } k++; } } int i = 0; while(i<kiki.length){ int p=0; while(p<10){ while(cap[p].isEmpty()==false){ kiki[i]=(int) cap[p].removeFirst(); } p++; } i++; } digi++; } } public int digital(int num, int pos){ int i = (int) (num % Math.pow(10,pos)); i= (int)(i/Math.pow(10, pos1)); return i; } void add(){ int i=0; while(i<mine.length){ mine[i] = (int)(Math.random()*Math.pow(10, digits)); i++; } } void makeArray(){ System.out.println("Max size?"); mine = new int[sn.nextInt()]; System.out.println("Max digits?"); if(digits<0){ System.out.println("bad USer"); }else{ digits = sn.nextInt(); } } }
Campbell Ritchie
Sheriff
Joined: Oct 13, 2005
Posts: 41852
31
posted
Apr 04, 2013 01:44:33
0
What is the algorithm for radix sort? Write it down on paper, then convert that to pseudo‑code, before trying to write code.
It is sorta covered in the
JavaRanch Style Guide
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subject: cant get my radix sort working:(
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