5
package demo;
import java.util.Scanner;
public class Ly {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("输入x1和y1:");
double x1 =input.nextDouble();
double y1 =input.nextDouble();
System.out.print("输入x2和y2:");
double x2 =input.nextDouble();
double y2 =input.nextDouble();
double x =Math.pow((x2 - x1),2);
double y =Math.pow((y2 - y1),2);
System.out.println("两个点之间的距离是:"+ Math.pow((x+y),0.5));
}
}