Why you do this to me java

 static void cdTest(){

        int num = 523;
        int d = 3;

        int[] cd=new int[d];
        cd = cadaDigito(num, d);

        int i = d;
        while(d-i!=d){
            System.out.println(cd[d-i]);
            i--;
        }
    }



    /**
     * @param num cifra
     * @param d   número de dígitos
     * @return arreglo con cada dígito
     */
    static int[] cadaDigito(int num, int d) {
        int cd[] = new int[d];
        int c = num;
        int i = 1;
        double r = 0;
        int a_Temp = 0;
        double e = 0;
        double m;

        do {
            r = c / Math.pow(10, d - i);
            a_Temp = (int) r;
            cd[i - 1] = a_Temp;
            e = r - a_Temp;
            m = Math.pow(10, d - i);
            c = (int)(e*m);
            i++;
        } while ((d - i) != -1);

        return cd;
    }