6번

package JavaFestival;

import java.util.Scanner;

public class jar6 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		
		
		while(true) {
			System.out.print("A 입력 >> ");
			int A = sc.nextInt();
			
			System.out.print("B 입력 >> ");
			int B = sc.nextInt();
			
			if(A==0 && B==0) {
				break;
			}
			System.out.println("결과 >> " +(int)(A-B));
		}
		
	}
}