Nguyễn Văn Tân 2172244 Kiem tra do dài 3 cạnh là 1 tam giác

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

namespace RetangleCheckerApp
{
    class Input
    {
        public void readFile()
        {
            string path = @"D:\input.txt";
            using (StreamReader sr = File.OpenText(path))
            {
                string s;
                while ((s = sr.ReadLine()) != null)
                {
                    double aRec, bRec, cRec;
                    string aRecString="", bRecString="", cRecString="";
                    int i = 0;
                    while (s[i] != ' ')
                        aRecString = aRecString + s[i];
                    i++;
                    while (s[i] != ' ')
                        bRecString = bRecString + s[i];
                    i++;
                    while (i < s.Length)
                    {
                        cRecString = cRecString + s[i];
                        i++;
                    }
                    aRec = Convert.ToDouble(aRecString);
                    bRec = Convert.ToDouble(bRecString);
                    cRec = Convert.ToDouble(cRecString);


                }

            }
        }
    }
    class Rectangle
    {
        public string getRectangleName(int ResultOfChecker)
        {
            switch (ResultOfChecker)
            {
                case 0: {return"...Ba canh nhap vao khong phai la mot tam giac...";  }
                case 1: { return"...Ba canh nhap vao la mot tam giac..."; }
                case 2: { return"...Ba canh nhap vao la mot tam giac CAN...";  }
                case 3: {return"...Ba canh nhap vao la mot tam giac DEU..."; }
                case 4: { return"...Ba canh nhap vao la mot tam giac VUONG...";  }
                case 5: { return "...Ba canh nhap vao la mot tam giac VUONG CAN..."; }
                default: {return "eRRoR";}
            }
        }
        public double aRec, bRec, cRec;
        public int RectangleChecker(double a, double b, double c)
        {
            int result = 0;
            this.aRec = a;
            this.bRec = b;
            this.cRec = c;


            //*0 3 canh lon hon 0
            if (aRec <= 0) return result;
            if (bRec <= 0) return result;
            if (cRec <= 0) return result;
            //*1  mot tam giac
            if ((aRec + bRec > cRec) && (aRec + cRec > bRec) && (bRec + cRec > aRec)) result = 1;
            //*3 tam giac deu
            if (result == 1)
            {
                if ((aRec == bRec) && (bRec == cRec)) result = 3;
                //*2 tam giac can
                else if ((aRec == bRec) || (aRec == cRec) || (cRec == bRec)) result = 2;
                //*4 kiem tra tam giac vuong
                if ((cRec * cRec == aRec * aRec + bRec * bRec) || (aRec * aRec == cRec * cRec + bRec * bRec) || (bRec * bRec == aRec * aRec + cRec * cRec))
                {
                    //neu vuong va can ==> tam giac vuong can *5
                    if (result == 2) result = 5;
                    //vuong => *4
                    else result = 4;
                }

            }
            return result;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            double a, b, c;
            int Loaitamgiac;

            Rectangle tamgiac = new Rectangle();
            while (true)
            {
                Console.WriteLine("Chuong trinh kiem tra 3 canh cua tam giac. Tra ve ket qua:");
                Console.WriteLine("0.Khong phai la tam giac.");
                Console.WriteLine("1.Tam Giac");
                Console.WriteLine("2.Tam Giac can");
                Console.WriteLine("3.Tam Giac Deu");
                Console.WriteLine("4.Tam Giac Vuong");
                Console.WriteLine("5.Tam Giac Vuong Can");
                Console.WriteLine("=========================================================");
                Console.WriteLine("");

                //Console.WriteLine("Vui long nhap do dai ba canh tam giac");
                //Console.Write("Canh a:      ");
                //a = Convert.ToDouble(Console.ReadLine());
                //Console.Write("Canh b:      ");
                //b = Convert.ToDouble(Console.ReadLine());
                //Console.Write("Canh c:      ");
                //c = Convert.ToDouble(Console.ReadLine());
                //Loaitamgiac = tamgiac.RectangleChecker(a, b, c);
                //switch (Loaitamgiac)
                //{
                //    case 0: { Console.WriteLine("...Ba canh nhap vao khong phai la mot tam giac..."); break; }
                //    case 1: { Console.WriteLine("...Ba canh nhap vao la mot tam giac..."); break; }
                //    case 2: { Console.WriteLine("...Ba canh nhap vao la mot tam giac CAN..."); break; }
                //    case 3: { Console.WriteLine("...Ba canh nhap vao la mot tam giac DEU..."); break; }
                //    case 4: { Console.WriteLine("...Ba canh nhap vao la mot tam giac VUONG..."); break; }
                //    case 5: { Console.WriteLine("...Ba canh nhap vao la mot tam giac VUONG CAN..."); break; }
                //}
                //Console.Write("...Nhan <ESC> de thoat...");
                if (Console.ReadKey().Key == ConsoleKey.Escape) break;
                Console.Clear();
            }
        }
    }
}