本程序用于求256级灰度图片的信息熵，输出大小为256的数组用于统计各像素出现的次数，以及输出信息熵。而且同时输出到dos和文件RESULT.TXT-The procedure for seeking 256 gray scale image of the information entropy, the output size of 256 pixel array for the number of occurrences of various statistics and output entropy. But also output to the dos and file RESULT.TXT