java haha

最新推荐文章于 2024-11-19 16:03:02 发布

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hdu2001

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner reader = new Scanner(System.in);
		while(reader.hasNextDouble()){
			double x1,y1,x2,y2;
			x1 = reader.nextDouble();
			y1 = reader.nextDouble();
			x2 = reader.nextDouble();
			y2 = reader.nextDouble();
			double ans = Math.sqrt((x1-x2)*(x1-x2)+ (y1-y2)*(y1-y2));
			System.out.printf("%.2f",ans);
			System.out.println();
		}
	}

}