using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace SpeedTest
{
    class Program
    {
        static void Main(string[] args)
        {
            //Pow()方法测试
            double resultDouble = 0D;
            Console.Write(">>>>浮点幂运算时间：");
            long startTime = DateTime.Now.Ticks;
            for (int i = 1; i <= 10000000; i++)
            {
                resultDouble = Math.Pow(2D, 2D);
            }
            Console.Write(DateTime.Now.Ticks-startTime);
            Console.WriteLine();
            //Power()方法测试
            Console.Write(">>>>整数幂运算时间：");
            long resultLong = 0L;
            startTime = DateTime.Now.Ticks;
            for (int i = 1; i <= 10000000; i++)
            {
                resultLong = Power(2L, 2);
            }
            Console.WriteLine(DateTime.Now.Ticks-startTime);
        }
        //整数求幂运算
        static long Power(long x, int y)
{
    if (y < 0)
    {
        return 0;
    }
    else if (y==0)
    {
        return 1;
    }
    else
    {
    long r=1;
        for (int i = 1; i <= y; i++)
        {
            r = r ＊ x;
        }
        return r;
    }
}
}
}