Answer:
The Java code is given below with appropriate variable names and tags for better understanding
Explanation:
import java.util.Scanner;
public class LabProgram{
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
int highwayNumber;
int primaryNumber;
highwayNumber = scnr.nextInt();
if(highwayNumber<1 || highwayNumber>999)
System.out.println(highwayNumber+" is not a valid interstate highway number.");
else{
if(highwayNumber>=1 && highwayNumber<=99){
System.out.print("The "+highwayNumber+" is primary, going ");
if(highwayNumber%2==1)
System.out.println("north/south.");
else
System.out.println("east/west.");
}
else{
primaryNumber = highwayNumber%100;
System.out.print("The "+highwayNumber+" is auxillary, serving the "+primaryNumber+", going ");
if(primaryNumber%2==1)
System.out.println("north/south.");
else
System.out.println("east/west.");
}
}
}
}
