C#面向对象思想计算两点之间距离

题目为计算两点之间距离。

面向过程的思维方式，两点的横坐标之差，纵坐标之差，平方求和，再开跟，得到两点之间距离。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Classes_2_point_distance
{
    class Program
    {
        static void Main(string[] args)
        {
            int x1 = -1;
            int y1 = -1;
            int x2 = int.Parse(Console.ReadLine());
            int y2 = int.Parse(Console.ReadLine());

            int xdiff = x2 - x1;
            int ydiff = y2 - y1;
            double distance = Math.Sqrt(xdiff * xdiff + ydiff * ydiff);

            Console.WriteLine(distance);
            Console.ReadKey();

        }
    }
}

　　面向对象的思路，题目中，两点间直线距离，名词包括点、直线、距离,首先我们构造一个点类。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Classes_2_point_distance
{
    class Point
    {
        private int x;
        private int y;

        public Point()
        {
            x = -1;
            y = -1;
        }

        public Point(int h, int z)
        {
            x = h;
            y = z;
        }
        public double Distance(Point p)
        {
            int xdiff = x - p.x;
            int ydiff = y - p.y;

            return Math.Sqrt(xdiff * xdiff + ydiff * ydiff);

        }
    }
}

然后再Programe.cs中实例化p1，p2两个点，计算距离

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Classes_2_point_distance
{
    class Program
    {
        static void Main(string[] args)
        {
            //int x1 = -1;
            //int y1 = -1;
            int x2 = int.Parse(Console.ReadLine());
            int y2 = int.Parse(Console.ReadLine());

            //int xdiff = x2 - x1;
            //int ydiff = y2 - y1;
            //double distance = Math.Sqrt(xdiff * xdiff + ydiff * ydiff);

            //Console.WriteLine(distance);
            //Console.ReadKey();

            Point p1 = new Point();
            Point p2 = new Point(x2, y2);
            double distance = p1.Distance(p2);
            Console.WriteLine(distance);
            Console.ReadKey();

        }
    }
}