unit pinyinfunction //漢字拼音相關的函數定義單元
Function GetHZPY(HZstr: String):String //將任意字符串中的漢字換成拼音首字母（大寫）
function GetPYIndexChar(hzchar: string):char //將一個漢字轉化成拼音首字母（大寫）
Program to plot x(t) =1/2+∑_(n=1)^∞▒ (sinc 〖n/2〗 〖 cos 〗 〖2πnt/4〗 )
Include n-value (Number of Terms) in graph on plot.
Show 2 graphs, original and simulated together.
