using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.Diagnostics; 

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {
            compare();
        }
        
        private static void compare()
        {
            Console.WriteLine("*****比較if-else與三目運算符的效率*****");
            for (int j = 1; j < 20; j++)
            {
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("這是第" + j + "次測試。");
                Console.ForegroundColor = ConsoleColor.White;

                Stopwatch time1 = new Stopwatch();

                time1.Start();

                for (int i = 0; i < 100000000; i++)
                {
                    int temp = 0;
                    if (temp == 1)
                        temp = 1;
                    else
                        temp = 0;
                }

                time1.Stop();
                TimeSpan t1 = time1.Elapsed;
                Console.WriteLine("if-else執行時間是："+t1.ToString());

                time1.Reset();

                Stopwatch time2 = new Stopwatch();

                time2.Start();
                for (int i = 0; i < 100000000; i++)
                {
                    int temp = 0;
                    temp = temp == 0 ? 1 : 0;
                }
                time2.Stop();
                TimeSpan t2 = time2.Elapsed;
                Console.WriteLine("三目運算符執行時間是：" + t2.ToString());

                time2.Reset();

                string conclusion = (t1 < t2) ? "if-else效率高" : "三目元算符效率高";
                float f1 = t1.Ticks;
                float f2 = t2.Ticks;
                float efficiency = (f1 < f2) ? f2 / f1 : f1 / f2;
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("結論是：" + conclusion + "，效率比是：" + efficiency.ToString());
            }
            Console.WriteLine("*****按下回車鍵關閉窗口*****");
            Console.ReadLine();
        }
    }
}