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POJava permutations 2
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  1. POJava permutations 2
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    copied!<p>I asked a question on helping me with this question about a week ago </p> <h2><a href="https://stackoverflow.com/questions/4340897/java-permutations">Java permutations</a></h2> <p>, with a problem in the print permutation method. I have tidied up my code and have a working example that now works although if 5 is in the 5th position in the array it doesn't print it. Any help would be really appreciated.</p> <pre><code> package permutation; public class Permutation { static int DEFAULT = 100; public static void main(String[] args) { int n = DEFAULT; if (args.length &gt; 0) n = Integer.parseInt(args[0]); int[] OA = new int[n]; for (int i = 0; i &lt; n; i++) OA[i] = i + 1; System.out.println("The original array is:"); for (int i = 0; i &lt; OA.length; i++) System.out.print(OA[i] + " "); System.out.println(); System.out.println("A permutation of the original array is:"); OA = generateRandomPermutation(n); printArray(OA); printPermutation(OA); } static int[] generateRandomPermutation(int n)// (a) { int[] A = new int[n]; for (int i = 0; i &lt; n; i++) A[i] = i + 1; for (int i = 0; i &lt; n; i++) { int r = (int) (Math.random() * (n)); int swap = A[r]; A[r] = A[i]; A[i] = swap; } return A; } static void printArray(int A[]) { for (int i = 0; i &lt; A.length; i++) System.out.print(A[i] + " "); System.out.println(); } static void printPermutation(int[] p) { int n = p.length-1; int j = 0; int m; int f = 0; System.out.print("("); while (f &lt; n) { m = p[j]; if (m == 0) { do f++; while (p[f] == 0 &amp;&amp; f &lt; n); j = f; if (f != n) System.out.print(")("); } else { System.out.print(" " + m); p[j] = 0; j = m - 1; } } System.out.print(" )"); } } </code></pre>
 

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