Mandelbrot图像

using System; using System.Collections.Generic; using System.Text; namespace ConsoleApplication3 {     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 = (imagtemp * imagtemp) + (realtemp * realtemp);                         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.ReadKey();          }     } }