Python程序設計基礎-習題答案 第7章課后習題答案

創(chuàng)建簡單窗口的關鍵步驟有哪些？答：導入tkinter模塊。建立主窗口（創(chuàng)建窗體）（3）在主窗口中添加組件.（4）窗口布局。（5）事件處理。（6）進入事件循環(huán)。GUI編程過程中，消息循環(huán)的作用是什么？GUI整個生命周期都處于消息循環(huán)中，它等待事件的發(fā)生，并驅動GUI應用作出對應的處理。事件分為哪幾類？Python中GUI中常用的事件分為鼠標事件和鍵盤事件兩種。編寫程序，輸入成績，單擊“顯示”按鈕，顯示該成績是否合格（60分及60分以上為合格）。importtkinterwin=tkinter.Tk()win.title("成績系統(tǒng)")win.geometry("400x250")win.resizable(width=False,height=False)'''標簽和輸入框'''titlelab=tkinter.Label(win,text="成績系統(tǒng)",font=("NSimSun",16),fg='black')titlelab.pack(side="top",pady=20)sort_lab=tkinter.Label(win,text="成績（百分制）:",font=("NSimSun",14),fg='black')sort_lab.place(x=30,y=70)sort_Ety=tkinter.Entry(win,font=("NSimSun",14),width=10)sort_Ety.place(x=200,y=70)'''顯示按鈕'''defShow():#win.destroy()#退出界面sort=sort_Ety.get()#讀取輸入框中內容ifsort.isdigit():#判斷是否是數字iffloat(sort)>=60:#判斷是否不小于60分show_lab=tkinter.Label(win,text="成績合格",font=("NSimSun",14),fg='black')show_lab.place(x=100,y=130)else:show_lab=tkinter.Label(win,text="成績不合格",font=("NSimSun",14),fg='black')show_lab.place(x=100,y=130)else:show_lab=tkinter.Label(win,text="輸入成績有誤",font=("NSimSun",14),fg='black')show_lab.place(x=100,y=130)btOK=tkinter.Button(win,text='顯示',font=("NSimSun",14),width=8,command=Show)btOK.place(x=160,y=180)win.mainloop()編寫程序，計算銀行的利息。根據輸入的存款金額、存款利率和存款年限，單擊“計算”按鈕，計算出對應的利息并顯示。importtkinterwin=tkinter.Tk()win.title("利率計算系統(tǒng)")win.geometry("400x400")win.resizable(width=False,height=False)'''標簽和輸入框'''titlelab=tkinter.Label(win,text="利率計算系統(tǒng)",font=("NSimSun",16),fg='black')titlelab.pack(side="top",pady=20)amount_lab=tkinter.Label(win,text="存款金額:",font=("NSimSun",14),fg='black')amount_lab.place(x=30,y=70)rate_lab=tkinter.Label(win,text="元",font=("NSimSun",14),fg='black')rate_lab.place(x=230,y=70)amount_Ety=tkinter.Entry(win,font=("NSimSun",14),width=8)amount_Ety.place(x=140,y=70)rate_lab=tkinter.Label(win,text="存款利率:",font=("NSimSun",14),fg='black')rate_lab.place(x=30,y=110)rate_lab=tkinter.Label(win,text="%",font=("NSimSun",14),fg='black')rate_lab.place(x=230,y=110)rate_Ety=tkinter.Entry(win,font=("NSimSun",14),width=8)rate_Ety.place(x=140,y=110)year_lab=tkinter.Label(win,text="存款年限:",font=("NSimSun",14),fg='black')year_lab.place(x=30,y=150)year_lab=tkinter.Label(win,text="年（取最小整數）",font=("NSimSun",14),fg='black')year_lab.place(x=230,y=150)year_Ety=tkinter.Entry(win,font=("NSimSun",14),width=8)year_Ety.place(x=140,y=150)'''顯示按鈕'''defShow():#win.destroy()#退出界面amount=amount_Ety.get()#讀取存款金額rate=rate_Ety.get()#讀取存款利率year=year_Ety.get()#讀取存款年限ifamount.isdigit()andrate.isdigit()andyear.isdigit():#判斷是否是數字total=float(amount)*(1+float(rate)/100)**int(year)showtext="到期總金額：{:.2f}元".format(total)show_lab=tkinter.Label(win,text=showtext,font=("NSimSun",14),fg='black')show_lab.place(x=100,y=260)else:show_lab=tkinter.Label(win,text="請檢查輸入內容",font=("NSimSun",14),fg='black')show_lab.place(x=100,y=260)btOK=tkinter.Button(win,text='計算',font=("NSimSun",14),width=8,command=Show)btOK.place(x=160,y=200)win.mainloop()編寫簡單的計算器，可以完成加減乘除運算。答：略編寫程序，當鼠標按下時，顯示鼠標的坐標。importtkinterwin=tkinter.Tk()win.title("鼠標事件")win.geometry("420x100")l1=tkinter.Label(win,text="鼠標X坐標",bg="snow",font=14)l1.pack(side="left",padx=10,pady=10)l2=tkinter.Label(win,text="X坐標值",bg="snow",font=14)l2.pack(side="left",padx=10,pady=10)l3=tkinter.Label(win,text="鼠標Y坐標",bg="snow",font=14)l3.pack(side="left",padx=10,pady=10)l4=tkinter.Label(wi