View Code of Problem 28

	public class nian {
		public void runnian(int a){
			if(a%4 != 0){
				System.out.println("Not Leap Year");
				return;
			}
			if(a%100 == 0 && a%400 != 0){
				System.out.println("Not Leap Year");
				return;
			}
			System.out.println("Leap Year");
		}
		
		public static void main(String[] args){
			nian N = new nian();
			N.runnian(1989);
			N.runnian(2000);
		}
	}
/*
Main.java:1: error: class nian is public, should be declared in a file named nian.java
	public class nian {
	       ^
1 error
*/