[2015][Homework]Team01 - Hw05

主函式

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

namespace Homework5
{
    class Program
    {
        static void Main(string[] args)
        {
            PinBoard board = new PinBoard();
            TriangleInformation trinagle = new TriangleInformation();
            Random metricGenerator = new Random();
            char selection;

            while(true)
            {
            rowInput:
                Console.WriteLine("Row =");
                board.Rows = int.Parse(Console.ReadLine());
                if(board.Rows <= 1)
                {
                    Console.WriteLine("輸入不合法，請從新輸入");
                    goto rowInput;
                }
            colunmInput:
                Console.WriteLine("Colunm =");
                board.Columns = int.Parse(Console.ReadLine());
                if (board.Columns <= 1)
                {
                    Console.WriteLine("輸入不合法，請從新輸入");
                    goto colunmInput;
                }
            xInput:
                Console.WriteLine("橫向間距 = ");
                board.XInterval  = Convert.ToDouble(Console.ReadLine());
                if(board.XInterval <= 0)
                {
                    Console.WriteLine("輸入不合法，請從新輸入");
                    goto xInput;
                }
            yInput:
                Console.WriteLine("縱向間距 = ");
                board.YInterval = Convert.ToDouble(Console.ReadLine());
                if (board.YInterval <= 0)
                {
                    Console.WriteLine("輸入不合法，請從新輸入");
                    goto yInput;
                }

                board.CreateArray();
                board.SetPinBoardArray();

                while(true)
                {
                 for (int i = 0; i <= 2; i++)
                  {
                   trinagle.PointArray[i] = board.PinArray[metricGenerator.Next(board.Rows), metricGenerator.Next(board.Columns)];
                  }
                 if(trinagle.IsLegal())
                  {
                      break;
                  }
                }                

                Console.WriteLine("三角形三點座標分別為:");
                for (int i = 0; i <= 2; i++)
                {
                    Console.WriteLine("({0},{1})", trinagle.PointArray[i].X, trinagle.PointArray[i].Y);
                }

                Console.WriteLine("三角形周長 = {0}",trinagle.Perimeter());
                Console.WriteLine("三角形面積 = {0}",trinagle.Area());
                Console.WriteLine("三角形外接圓半徑 = {0}", trinagle.RadiusOfCircle());

                Console.WriteLine("是否繼續執行?");
                selection = Convert.ToChar(Console.ReadLine());
                if (selection != 'Y' && selection != 'y')
                {
                    break;
                }
                else
                {
                    Console.Clear();
                }
            }
        }
    }
}

Mypoint

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

namespace Homework5
{
    public class MyPoint
    {
        public double X;
        public double Y;

        public double DistanceTo(MyPoint P)
        {
            double Distance;
            Distance = Math.Sqrt((X - P.X) * (X - P.X) + (Y - P.Y) * (Y - P.Y));
            return Distance;
        }
    }
}

PinBoard

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

namespace Homework5
{
    public class PinBoard
    {
        public int Rows;
        public int Columns;
        public double XInterval;
        public double YInterval;
        public MyPoint[,] PinArray = null;

        public void CreateArray()
        {
            PinArray = new MyPoint[Rows, Columns];
            for (int i = 0; i < Rows; i++)
            {
                for (int j = 0; j < Columns; j++)
                {
                    PinArray[i, j] = new MyPoint();
                }
            }
        }

        public void SetPinBoardArray()
        {
            double xCoordinate = 0;
            double yCoordinate;

            for (int i = 0; i < Rows; i++)
            {
                yCoordinate = 0;
                for (int j = 0; j < Columns; j++)
                {
                    PinArray[i, j].X = xCoordinate;
                    PinArray[i, j].Y = yCoordinate;
                    yCoordinate += YInterval;
                }
                xCoordinate += XInterval;
            }
        }
    }
}

TriangleInformation

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

namespace Homework5
{
    public class TriangleInformation
    {
        public MyPoint[] PointArray = new MyPoint[3];

        public void SetArray(MyPoint[] metric)
        {
            for (int i = 0; i <= 2; i++)
            {
                PointArray[i] = metric[i];
            }
        }

        public double Perimeter()
        {
            double lengthA = PointArray[0].DistanceTo(PointArray[1]);
            double lengthB = PointArray[1].DistanceTo(PointArray[2]);
            double lengthC = PointArray[2].DistanceTo(PointArray[0]);

            return lengthA + lengthB + lengthC;
        }

        public double Area()
        {
          double lengthA = PointArray[0].DistanceTo(PointArray[1]);
          double lengthB = PointArray[1].DistanceTo(PointArray[2]);
          double lengthC = PointArray[2].DistanceTo(PointArray[0]);

          double averageLength = (lengthA + lengthB + lengthC) / 2;
          double areaOfTriangle = Math.Sqrt(averageLength*(averageLength-lengthA)*(averageLength-lengthB)*(averageLength-lengthC));

          return areaOfTriangle;
        }

        public double RadiusOfCircle()
        {
            double lengthA = PointArray[0].DistanceTo(PointArray[1]);
            double lengthB = PointArray[1].DistanceTo(PointArray[2]);
            double lengthC = PointArray[2].DistanceTo(PointArray[0]);

            double cosTheda = (Math.Pow(lengthB, 2) + Math.Pow(lengthC, 2) - Math.Pow(lengthA, 2)) / (2 * lengthB * lengthC);
            double sinTheda = Math.Sqrt((1 - Math.Pow(cosTheda, 2)));

            return lengthA / 2 / sinTheda;
        }

        public bool IsLegal()
        {
            double lengthA = PointArray[0].DistanceTo(PointArray[1]);
            double lengthB = PointArray[1].DistanceTo(PointArray[2]);
            double lengthC = PointArray[2].DistanceTo(PointArray[0]);

            if (lengthA + lengthB > lengthC && lengthB + lengthC > lengthA && lengthA + lengthC > lengthB)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    }
}