16. Primary U.S. interstate highways are numbered 1-99. Odd numbers (like the 5 or 95) go north/south, and evens (like the 10 or 90) go east/west. Auxiliary highways are numbered 100-999, and service the primary highway indicated by the rightmost two digits. Thus, I-405 services I-5, and I-290 services I-90.

Given a highway number, indicate whether it is a primary or auxiliary highway. If auxiliary, indicate what primary highway it serves. Also indicate if the (primary) highway runs north/south or east/west.

Example Input | Example Output

90 | I-90 is primary, going east/west.

290 | I-290 is auxiliary, serving I-90, going east/west.

0 (or >999) | 0 (or the input) is not a valid interstate highway number.

200 | 200 is not a valid interstate highway number. (It seems to be

a valid auxiliary highway num, but there is no 00 highway.)

/*

* TestHighwayNum.java

* Decide whether an input number represents a valid primary or auxiliary highway number.

*/

import java.util.Scanner;

public class TestHighwayNum {

public static void main(String[] args) {

Scanner scnr = new Scanner(System.in);

int highwayNumber;

int primaryNumber;

System.out.print("Please enter a valid high way number (1~999): ");

highwayNumber = scnr.nextInt();

/* ADD your code here. */

}

}