글 읽기 - 출력에 대해 질문이 있습니다.

rave189 3년 전 0

출력을 할 때 System.out.println(count)와 bw.flush를 왜 같이사용하면 안되는지 궁금합니다.

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	
	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
	static int count = 0;
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int num = Integer.parseInt(br.readLine());
		hanoi(num, 1, 2, 3);
		System.out.println(count);
		bw.flush();
	}
	
	public static void hanoi(int n, int fir, int sec, int last) throws IOException {
		if(n == 1) {
			bw.write(fir+" "+last+"\n");
			count++;
		}
		else {
			hanoi(n-1, fir, last, sec);
			bw.write(fir+" "+last+"\n");
			count++;
			hanoi(n-1, sec, fir, last);
		}
	}
}