CSM EXP 7

import java.util.*;

class ACT {

    static double[] LCR(int n) {
        double x[] = new double[n];
        int a = 25678;
        int m = 25671;
        int c = 24123;
        int seed = 4;
        x[0] = seed;
        for (int i = 1; i < n; i++) {
            x[i] = ((a * x[i - 1] + c) % m) / 100000.0;
        }
        return x;

    }

    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        double rn[] = LCR(100);
        System.out.println("hello");
        int length_rn = 100;
        System.out.println("Enter i");
        int a = sc.nextInt();
        System.out.println("Enter l");
        int l = sc.nextInt();

        System.out.println("Enter Zcrit");
        double zcrit = sc.nextDouble();
        int i;
        for (i = 0; i <= length_rn; i++) {
            int leq = a + (i + 1) * l;
            if (leq > length_rn) {
                break;
            }
        }
        int M = i - 1;

        double sum_act = 0;
        for (i = a; i < (a + M); i++) {
            //System.out.println(rn[i]+"at"+i+"  "+rn[i+1]);
            sum_act += rn[i] * rn[i + 1];
        }
        double p = (sum_act / (M + 1)) - 0.25;

        double sigma = Math.sqrt(13 * M + 7) / (12 * (M + 1));

        double z0 = p / sigma;
        if (zcrit >= z0) {
            System.out.println("It passes auto correlation test");
        } else {
            System.out.println("It fails auto correlation test");
        }
    }

}

/*OUTPUT
Enter i
3
Enter l
19
Enter Zcrit
0.25
-1.8741290699558104
It passes correlation test

*/