Mandelbrot命令行实现

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《C#入门经典》里的一段程序，感觉很赞，在此分享。

using System;namespace Mandelbrot{    class Program    {        static void Main(string[] args)        {            double realCoord, imagCoord;            double realTemp, imagTemp, realTemp2, arg;            int iterations;            for (imagCoord = 1.2; imagCoord >= -1.2; imagCoord -= 0.05)            {                for (realCoord = -0.6; realCoord <= 1.77; realCoord += 0.03)                {                    iterations = 0;                    realTemp = realCoord;                    imagTemp = imagCoord;                    arg = (realCoord * realCoord) + (imagCoord * imagCoord);                    while ((arg < 4) && (iterations < 40))                    {                        realTemp2 = (realTemp * realTemp) - (imagTemp * imagTemp) - realCoord;                        imagTemp = (2 * realTemp * imagTemp) - imagCoord;                        realTemp = realTemp2;                        arg = (realTemp * realTemp) + (imagTemp * imagTemp);                        iterations += 1;                    }                    switch (iterations % 4)                    {                        case 0:                            Console.Write(".");                            break;                        case 1:                            Console.Write("o");                            break;                        case 2:                            Console.Write("O");                            break;                        case 3:                            Console.Write("@");                            break;                    }                }                Console.Write("\n");            }            Console.ReadLine();        }    }}