python简易计算器

Question

谢谢各位！
阿里嘎多
thank you
康萨哈密达
阔步昆
梅河西
感谢

Answer 1

完美复刻

from tkinter import *

def add():
    a = eval(num_a.get())
    b = eval(num_b.get())
    result.set(a+b)

def minus():
    a = eval(num_a.get())
    b = eval(num_b.get())
    result.set(a-b)

def mul():
    a = eval(num_a.get())
    b = eval(num_b.get())
    result.set(a*b)

def dev():
    a = eval(num_a.get())
    b = eval(num_b.get())
    result.set(a/b)

def delete():
    num_a.set('')
    num_b.set('')
    result.set('')


root = Tk()
root.title('简易计算器')
root.geometry=('300x200')
root.resizable(0,0)

Label(root, text='First Number:').grid(row=0,columnspan=3)
num_a = StringVar()
Entry(root, width=30,textvariable=num_a).grid(row=1,column=1)
btn_add = Button(root,text='+',width=2,command=add).grid(row=1,column=4)
Label(root,text='Second Number:').grid(row=2,columnspan=3)
btn_minus = Button(root,text='-',width=2,command=minus).grid(row=2,column=4)
num_b = StringVar()
Entry(root, width=30,textvariable=num_b).grid(row=3,column=1)
btn_mul = Button(root,text='*',width=2,command=mul).grid(row=3,column=4)
Label(root,text='Result:').grid(row=4,columnspan=3)
btn_dev = Button(root,text='/',width=2,command=dev).grid(row=4,column=4)
result = StringVar()
Entry(root,width=30,textvariable=result).grid(row=5,column=1)
btn_del = Button(root,text='del',command=delete).grid(row=5,column=4)

root.mainloop()