说明：  产生若干个周期的正弦波数据，以当前系统日期和自己的姓名为文件名分别存储为文本文件、二进制文件和电子表格文件，然后分别读取并显示其波形
(Generates several cycles of sine wave data, which are stored as text files, binary files, and spreadsheet files respectively with the current system date and their name as file names, and then read and display their waveforms respectively.)