输入图象显示源程序，建立C语言程序调试环境。在计算机屏幕上显示指定的图象。（A2，B2）.修改程序，在屏幕上显示256*256的灰度图象（左暗-右亮、左上暗-中间亮-右下暗）。-input image display source code, build the C language program debugging environment.display the specified image on the computer screen. (A2, B2)modify the program, 256* 256 display grayscale images on the screen (left dark- right light, left dark- bright middle- right off).