正弦波，三角波，方波绘制图并发声，可根据频率，幅度，相位，生成声音和波形图-Sine wave, triangle wave, square wave drawing and sound, according to the frequency, amplitude, phase, generating sound and waveform graph

Dos下的用画图系统，用graph.h编写。能编译成功但是在AMD内核的环境下有可能运行不了。-Drawing system used under Dos with graph.h prepared. However, AMD can successfully compile the kernel may not run under.