个低级的BMP图像读写程序，代码内有丰富的注释。改变灰度图像的颜色表蓝色分量的值,察看前后变化，将图像数据存盘，清除缓冲区，pBmpBuf和pColorTable是全局变量，在文件读入时申请的空间-A low-level BMP image read and write procedures, the code is well commented. Change the gray-scale image of the value of the blue component of the colo