第2章：幾何方面：兩點間距離

/**
 * 幾何方面：兩點間距離。
 * 提示用戶輸入兩個點(x1, x2)和(y1, y2)：
 * 顯示兩個點間的距離。
 * 計算倆點間距離的公式是Math.pow((x2-x1), 2)+ Math.pow((y2-y1), 2)。
 * 下面是一個運行示例：
 * ————————————————————————————————————————————————————————
 * | Enter x1 and y1: 1.5 -3.4                            |
 * | Enter x2 and y2: 4 5                                 |
 * | The distance of the two points is: 8.764131445842194 |
 * ————————————————————————————————————————————————————————
 */
package Test;

import java.util.Scanner;

public class T220Scanner {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.print("Enter x1 and y1: ");
		double x1 = input.nextDouble();
		double y1 = input.nextDouble();
		
		System.out.print("Enter x2 and y2: ");
		double x2 = input.nextDouble();
		double y2 = input.nextDouble();
		
		double dis = Math.pow((x2-x1), 2)+ Math.pow((y2-y1), 2);
		double distance = Math.sqrt(dis);
//		double distance = Math.sqrt(Math.pow((x2-x1), 2)+ Math.pow((y2-y1), 2));
		System.out.println("The distance of the two points is: " + distance);
	}
}