/* 林姵語2022.11.7.w3shools,陳列array,陳列長度方法length,陳列室在型態後面加[]cornerbracket*/
public class Main {
public static void main(String[] args) {
String[] hey = {"富豪", "寶馬", "福特", "馬自達","勞斯萊斯"};
System.out.println(hey.length);
/* 方法,函數, length陳列長度 */
/* 迴圈輸出陳列 hey*/
for ( int i = 0; i < 5; i++){
System.out.printIn(hey[i];)
}
for(string i: hey){/*使用for-each迴圈,將each屬於hey陳列的元素*/
System.out.printn(i);
}
}
}
/*() round bracket, <> angle角 bracket,[]coner bracket, ()curly bracket捲形
林姵語python運算CSV輸出TKINTER投資風險與報酬Markowitz
關鍵程式碼 def draw():#按下按鈕button1執行draw canvas.create_line(0,500,700,500,width=3,fill='black',arrow='last') canvas.create_line(10,600,10,5,width=3,fill='black',arrow='last') for firm in firms: t=(firm, year.get()) x = 10+20*stdev[t]*2*3**0.5 #放大20 y = 500 - 10*mean[t]*12 #放大10 dot=canvas.create_oval(x-5,y-5,x+5,y+5,fill='blue') lab=canvas.create_text(x+10,y,text=firm[4:7],anchor=W,font=('微軟中黑體', 16)) def delete():#按下按鈕button2執行delete canvas.delete('all') years=[x for x in range(2007, 2025)] year=IntVar(tk) year.set(years[0]) label = Label(tk, text="年度",font=('Arial',30,'bold'),).pack(side=LEFT) #距離左側 option1 = OptionMenu(tk, year, *years).pack(side=LEFT) button1 = Button(tk, text="林姵語繪圖 ",font=('Arial',30,'bold'), command = draw, bg='black',fg='white').pack(side=LEFT) button2 = Button(tk, text="林姵語刪除...

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