Java 2.15（几何：两点间距离）编写程序，提示用户输入两点（x1,y1）和（x2,y2），然后显示两点间的距离。

计算两点间的公式是 = 

注意：可以使用Math.pow（a，0.5）来计算 

下面是一个运算示例：

Enter x1 and y1： 1.5    -3.4

Enter x1 and y2： 4   5

The distance between the two points is 8.764131445842194 

package Second;

import java.util.Scanner;

public class Code_15 {

	public static void main(String[] args) {
		System.out.print("Enter x1 and y1：");
	    Scanner input = new Scanner(System.in);
	    double x1 = input.nextDouble();
	    double y1 = input.nextDouble();
	    System.out.println("Enter x1 and y2:");
	    double x2 = input.nextDouble();
	    double y2 = input.nextDouble();
	    double a= Math.pow(x2 - x1, 2) + Math.pow(y2 - y1,2);
	    System.out.println("The distance between the two points is " + Math.pow(a,0.5));
	    
	}

}

 输出

Enter x1 and y1：1.5
-3.4
Enter x1 and y2:
4
5
The distance between the two points is 8.764131445842194