import tkinter
import re
def del_zero(*args):
global num
c()
r = re.match(r"(\d+\.?\d*)([/*+-]{0,2})(\d*?\.?\d*)(=?)$", num)
if r:
if r.group(1) != '': # 第1个单元有值2个字符00-09判断
if len(num) == 2:
if len(r.group(1)) == 2:
if r.group(1)[0] == '0' and r.group(1)[1].isdigit():
num = r.group(1)[1]
if r.group(2) != '': # 第2个单元满足不为空的时候
if '.' == r.group(1)[-1]: # 判断第1个单元如果有1'.'在后的处理
num = num[:-1]
elif len(r.group(1)) >= 3: # 判断第1个单元如果有1'.'在中间 对于多'0'处理
if r.group(1)[0] == '0' and r.group(1)[1] == '.':
# 处理.后一堆0 # 剩余的0个数
for i in range(2, len(r.group(1))):
if r.group(1)[i] != '0':
break
else:
num = '0' + r.group(2)
if len(r.group(2)) == 2: # 判断运算符号个数
num = r.group(1) + r.group(2)[-1]
if r.group(3) != '': # 判断第3个单元不为空的输入
if len(r.group(3)) == 1: # 第3个单元有值2个字符00-09判断
if not r.group(3)[0].isdigit():
num = num[:-1]
elif len(r.group(3)) == 2:
if r.group(3)[0] == '0' and r.group(3)[1].isdigit():
num = r.group(1) + r.group(2) + r.group(3)[1]
elif len(r.group(3)) >= 3:
if r.group(3)[-1] == '.' and r.group(3)[-2] == '.': # 处理第三单元.的个数
num = num[:-1]
if r.group(4) == '=': # 第4个单元为'='时
if r.group(3) != '':
if r.group(3)[-1] == '.': # 判断第3个单元.在最后的处理
num = num[:-1]
elif len(r.group(3)) >= 3: # 判断第3个单元如果出现0.00000这类的处理
if r.group(3)[0] == '0' and r.group(3)[1] == '.':
for i in range(2, len(r.group(3))): # 处理.后一堆0 # 剩余的0个数
if r.group(3)[i] != '0':
break
else:
num = r.group(1) + r.group(2) + '0'
if r.group(2) != '' and r.group(3)[-1].isdigit(): # 如果=号左边为数字 开始结算
cal_1()
else:
num = num[:-1] # 第3单元空 第2单元空
v.set(num)
else:
num = num[:-1]
v.set(num)
def fun0():
global num
c()
num += '0'
del_zero()
def fun1():
global num
c()
num += '1'
del_zero()
def fun2():
global num
c()
num += '2'
del_zero()
def fun3():
global num
c()
num += '3'
del_zero()
def fun4():
global num
c()
num += '4'
del_zero()
def fun5():
global num
c()
num += '5'
del_zero()
def fun6():
global num
c()
num += '6'
del_zero()
def fun7():
global num
c()
num += '7'
del_zero()
def fun8():
global num
c()
num += '8'
del_zero()
def fun9():
global num
c()
num += '9'
del_zero()
def fun():
global num
c()
num += '.'
del_zero()
def fun_add():
global num
c()
num += '+'
del_zero()
def fun_sub():
global num
c()
num += '-'
del_zero()
def fun_chen():
global num
c()
num += '*'
del_zero()
def fun_chu():
global num
c()
num += r'/'
del_zero()
def fun_del():
global num
c()
if num != '':
num = num[:-1]
v.set(num)
def fun_c():
global num
c()
if num != '':
num = ''
v.set(num)
def fun_ce():
global num
c()
if num == '':
v.set(num)
else:
r = re.match(r"(\d+\.?\d*)([/*+-]{0,2})(\d*?\.?\d*)(=?)$", num)
if r:
if r.group(3) != '':
num = r.group(1) + r.group(2)
v.set(num)
# 状态函数 负责清空结算
def c():
global num, count
if count == 1:
num = ''
count = 0
def cal_1():
global num, count
r = re.match(r"(\d+\.?\d*)([/*+-]{0,2})(\d*?\.?\d*)(=?)$", num)
sum1 = 0
if '.' in r.group(1):
x = float(r.group(1))
else:
x = int(r.group(1))
if '.' in r.group(3):
y = float(r.group(3))
else:
y = int(r.group(3))
if '+' == r.group(2):
sum1 = x + y
elif '-' == r.group(2):
sum1 = x - y
elif '*' == r.group(2):
sum1 = x * y
elif '/' == r.group(2):
if r.group(3) == '0':
num = r.group(1) + r.group(2)
return -1
else:
sum1 = x / y
num += str(sum1)
count = 1
def cal():
global num
num += '='
del_zero()
def callback(event):
if event.char == '0':
fun0()
elif event.char == '1':
fun1()
elif event.char == '2':
fun2()
elif event.char == '3':
fun3()
elif event.char == '4':
fun4()
elif event.char == '5':
fun5()
elif event.char == '6':
fun6()
elif event.char == '7':
fun7()
elif event.char == '8':
fun8()
elif event.char == '9':
fun9()
elif event.char == '.':
fun()
elif event.char == '+':
fun_add()
elif event.char == '-':
fun_sub()
elif event.char == '*':
fun_chen()
elif event.char == r'/':
fun_chu()
elif event.char == '\r':
cal()
else:
pass
root = tkinter.Tk()
root.title('简易计算器')
root.resizable(0, 0)
frame2 = tkinter.Frame(root)
frame2.grid(row=0, column=1, padx=5, pady=5)
num = ''
count = 0
v = tkinter.StringVar()
label2 = tkinter.Label(frame2, textvariable=v).grid(row=0, column=1, padx=5, pady=5)
frame1 = tkinter.Frame(root)
frame1.grid(row=1, column=1, padx=5, pady=5)
root.bind('<Key>', callback)
root.focus_set()
tkinter.Button(frame1, text='←', width=4, command=fun_del).grid(row=2, column=0, padx=2, pady=5)
tkinter.Button(frame1, text='C', width=4, command=fun_c).grid(row=2, column=1, padx=2, pady=5)
tkinter.Button(frame1, text='CE', width=4, command=fun_ce).grid(row=2, column=2, padx=2, pady=5)
tkinter.Button(frame1, text='/', width=4, command=fun_chu).grid(row=2, column=3, padx=5, pady=5)
tkinter.Button(frame1, text='7', width=4, command=fun7).grid(row=3, column=0, padx=5, pady=2)
tkinter.Button(frame1, text='8', width=4, command=fun8).grid(row=3, column=1, padx=2, pady=2)
tkinter.Button(frame1, text='9', width=4, command=fun9).grid(row=3, column=2, padx=2, pady=2)
tkinter.Button(frame1, text='*', width=4, command=fun_chen).grid(row=3, column=3, padx=5, pady=2)
tkinter.Button(frame1, text='4', width=4, command=fun4).grid(row=4, column=0, padx=5, pady=2)
tkinter.Button(frame1, text='5', width=4, command=fun5).grid(row=4, column=1, padx=2, pady=2)
tkinter.Button(frame1, text='6', width=4, command=fun6).grid(row=4, column=2, padx=2, pady=2)
tkinter.Button(frame1, text='-', width=4, command=fun_sub).grid(row=4, column=3, padx=5, pady=2)
tkinter.Button(frame1, text='1', width=4, command=fun1).grid(row=5, column=0, padx=5, pady=2)
tkinter.Button(frame1, text='2', width=4, command=fun2).grid(row=5, column=1, padx=2, pady=2)
tkinter.Button(frame1, text='3', width=4, command=fun3).grid(row=5, column=2, padx=2, pady=2)
tkinter.Button(frame1, text='+', width=4, command=fun_add).grid(row=5, column=3, padx=5, pady=2)
tkinter.Button(frame1, text='0', width=4, command=fun0).grid(row=6, column=0, padx=5, pady=5)
tkinter.Button(frame1, text='.', width=4, command=fun).grid(row=6, column=1, padx=2, pady=5)
tkinter.Button(frame1, text='=', width=10, command=cal).grid(row=6, column=2, padx=5, pady=5, columnspan=2)
root.mainloop()
( 粤ICP备18085999号-1 | 粤公网安备 44051102000585号)
狗仔卡
发表于 2020-9-7 23:56:43
置顶卡
千斤顶
显身卡
楼主
发表于 2020-11-22 15:21:07