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[Java教程](几何:两点间的距离)编写程序,提示用户输入两个点(x1,y1),(x2,y2),然后显示两点间的距离,利用公式,提示:math.pow(a,0.5)=根号啊。

import java.util.Scanner;public class Demo_1{ public static void main(String[] args) {  Scanner input = new Scanner(System.in);  System.out.print("Enter x1 and y1: ");  System.out.print("Enter x2 and y2: ");  double b=input.nextDouble();  double d=input.nextDouble();  double a=input.nextDouble();  double c=input.nextDouble();      double y= (b-a)*(b-a)+(d-c)*(d-c);  double distance = Math.pow(y, 0.5);  System.out.print("The distance the two points is " + distance); }}