这是我初学习绘制各种波形（如正弦波）时所学习的一个程序，很难得，界面美观，滚动显示波形曲线，望大家深入研究。-This is my early learning to draw various waveform,（ such as sine wave) learning by a program that is very rare, interface aesthetics, scroll waveform curve, hope everybody study.