Linux下的开源软件QCAD完整源代码，方便需要编制类CAD/CAM程序-Linux open-source software QCAD integrity of the source code, the need to facilitate the preparation of CAD / CAM processes

linux下的c语言代码，调用linux的Ncurses图形库，实现用户登录界面，tab键实现焦点转移，输入帐号admin 密码123456则提示登录成功，linux下 make clean；make编译，./main执行-linux c language code, call the Ncurses linux graphics library that implements the user login screen, tab key to shift the focus to achiev

使用qwt库绘制随机曲线，可以调节速度，代码清晰，linux下可直接执行。-Use the Qwt library to draw random curve, you can adjust the speed, code clarity, Linux can be directly executed.

数字水印在linux下面运行的代码,内有详细的注释说名-The code that runs beneath the digital watermark in Linux, with detailed comments said