3주차

import tkinter as tk

window = tk.Tk()#.grid(columnspan=3,row=3)
window.title('계산기')


operator='none'
calculation = 0

def button_click(key=0):
    global num1, num2
    if operator == 'none':
        if print_value.get() == '0':
            print_value.set(str(key))
            num1=key
        else:
            num1 *= 10
            num1 += key
            print_value.set(str(num1))
    else:
        if print_value.get() == '0' or num2 == 0:
            print_value.set(str(key))
            num2=key
        else:
            num2 *= 10
            num2 += key
            print_value.set(str(num2))

def operator_click(op):
    global operator
    operator = op

def calculate():
    global num1, num2, operator
    if operator == '+':
        calculation = num1 + num2
    elif operator == '-':
        calculation = num1 - num2
    elif operator == '*':
        calculation = num1 * num2
    elif operator == '/':
        calculation = num1 / num2
    else:
        calculation = 0

    print_value.set(str(calculation))
    num1 = 0
    num2 = 0
    operator = 'none'

def initalize():
    global num1, num2, operator
    num1 = 0
    num2 = 0
    operator = 'none'
    print_value.set('0')

# 0열
#출력 창
num1, num2 = 0, 0
print_value = tk.StringVar()
print_value.set('계산식을 입력하세요')
display = tk.Entry(window, width = 30, textvariable=print_value, justify='right').grid(columnspan=5, row=0)
# 1열
button = tk.Button(window, text='1',width=10,height=5, command=lambda: button_click(1)).grid(column=0,row=1)
button = tk.Button(window, text='2',width=10,height=5, command=lambda: button_click(2)).grid(column=1,row=1)
button = tk.Button(window, text='3',width=10,height=5, command=lambda: button_click(3)).grid(column=2,row=1)
button = tk.Button(window, text='C',width=10,height=5, command=initalize).grid(column=3,row=1)
# 2열
button = tk.Button(window, text='4',width=10,height=5, command=lambda: button_click(4)).grid(column=0,row=2)
button = tk.Button(window, text='5',width=10,height=5, command=lambda: button_click(5)).grid(column=1,row=2)
button = tk.Button(window, text='6',width=10,height=5, command=lambda: button_click(6)).grid(column=2,row=2)
button = tk.Button(window, text='+',width=10,height=5, command=lambda: operator_click('+')).grid(column=3,row=2)
# 3열
button = tk.Button(window, text='7',width=10,height=5, command=lambda: button_click(7)).grid(column=0,row=3)
button = tk.Button(window, text='8',width=10,height=5, command=lambda: button_click(8)).grid(column=1,row=3)
button = tk.Button(window, text='9',width=10,height=5, command=lambda: button_click(9)).grid(column=2,row=3)
button = tk.Button(window, text='-',width=10,height=5, command=lambda: operator_click('-')).grid(column=3,row=3)
# 4열
button = tk.Button(window, text='0',width=10,height=5, command=lambda: button_click(0)).grid(column=0,row=4)
button = tk.Button(window, text='x',width=10,height=5, command=lambda: operator_click('*')).grid(column=1,row=4)
button = tk.Button(window, text='/',width=10,height=5, command=lambda: operator_click('/')).grid(column=2,row=4)
button = tk.Button(window, text='=',width=10,height=5, command=calculate).grid(column=3,row=4)

window.mainloop()```