计算线段长度

解题思路:Math.sqrt()方法

注意事项:

参考代码:import java.util.Scanner;

public class Main {
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       double Xa = sc.nextDouble();
       double Ya = sc.nextDouble();
       double Xb = sc.nextDouble();
       double Yb = sc.nextDouble();
       double l = (Xa-Xb)*(Xa-Xb)+(Ya-Yb)*(Ya-Yb);
       System.out.printf("%.3f",Math.sqrt(l));
   }
}