public class YourNameProg3 {
        // pass the number you wish to display
        private void displayBits(int number) {
                System.out.print(number + "\t");

                for (int bit=31; bit>=0; bit--) {
                        char ch = (((1 << bit) & number) != 0) ? '1' : '0';
                        System.out.print(ch);
                        if (bit % 4 == 0) { System.out.print(' '); }
                }
                System.out.println();
        }

        private void displayNegPosPows(int number) {
                displayBits(number);
                if (number > 0) {
                        displayNegPosPows(number>>1);
                        displayBits(-number);
                }
        }

        // ask the user for a number
        // your code here
        private int getUserNumber() {
                return 127;
        }

        public void run() {
                displayNegPosPows(128);
                // ask user for number
                // your code here
                displayBits(getUserNumber());
        }


        public static void main (String[] args) {
                new Prog3().run();
        }
}