/**
 * Write an application that creates and prints a random phone number of the form XXX - XXX - XXXX.
 * Include the dashes in the output. Do not let the first three digits contain an 8 or 9,
 * make sure that the second set of three digits is not greater than 742.
 */

public class Main {

    public static int generateRandomInteger(int max) {
		return (int)(java.lang.Math.random() * (max+1));
    }

    public static int generateRandomInteger(int min, int max) {
        return (int) (java.lang.Math.random() * (max+1) / min);
    }


    public static void main(java.lang.String[] args) {
        System.out.println("Generating telephone number...");
        int[] areaCode = new int[3];
        int[] firstDigits = new int[3];
        int[] lastDigits = new int[4];
        String outcome = "";
        //Fill the area code
        for(int i = 0; i < areaCode.length; i++) {
            areaCode[i] = generateRandomInteger(7); //Will allow any number between 0 - 7
            outcome += ""+areaCode[i];
        }
        outcome += " - ";
        //Fill the first digits.
        for(int i2 = 0; i2 < firstDigits.length; i2++) {
            switch(i2) {
                case 0:
                    firstDigits[i2] = generateRandomInteger(2, 7); // Will allow any digits between 2-7
                break;
                case 1:
                    firstDigits[i2] = generateRandomInteger(4); /// Will allow any digits between 0-4
                break;
                case 2:
                    firstDigits[i2] = generateRandomInteger(2); // Will allow any digits between 0-2;
                break;
            }
            outcome += ""+firstDigits[i2];
        }
        outcome += " - ";
        //Fill the last
        for(int i3 = 0; i3 < lastDigits.length; i3++) {
            lastDigits[i3] = generateRandomInteger(9); // Allows any digits between 0-9
            outcome += ""+lastDigits[i3];
        }
        //Print it
        System.out.println(outcome);
    }
}