TC环境下C语言实现的类似于matlab的数字信号和数字系统分析。使用图形界面，具有坐标显示。可以有z变换后的系统函数直接分析系统的幅频和相频响应-TC C language environment similar to matlab digital signal and digital systems analysis. Use graphical interface, with coordinates display. Z-transform can be directly after th