我怎样才能解决这个错误：类型错误：不支持的操作数类型（S）为/：“海峡”和“廉政”（这是一个小费计算器）

Question

我的代码是在这里：

import sys 
from tkinter import * 
def mhello(): 
    text1 = total 
    mlabel1 = Label(text=text1, fg ="red") 
    mlabel1.pack() 
    return 
dog = Tk() 
input0 = StringVar() 
input1 = StringVar() 
input2 = StringVar() 
dog.geometry('450x450') 
dog.title("Tip Calculator") 
mlabel = Label(text='This is a Simple Tip Calculator', fg ="red") 
mlabel.pack() 
mentry = Entry(dog, textvariable=input0) 
mentry.pack() 
mentry0 = Entry(dog, textvariable=input1) 
mentry0.pack() 
mentry1 = Entry(dog, textvariable=input2) 
mentry1.pack() 
meal = input0.get() 
tax = input1.get() 
tip = input2.get() 
tip = tip/100 
tax = tax/100 
meal = meal + meal * tax 
total = meal + meal * tip 
mbutton = Button(text='Calculate',command = mhello) 
mbutton.pack() 

dog.mainloop() 

Answer 1

Input.get （）返回字符串，你必须将它转换为float：float（Input0.get（））

Answer 2

你不能用整数分割字符串。相反，先将其转换为int或float，这取决于你的目标：

>>> '120'/100 

Traceback (most recent call last): 
    File "<pyshell#8>", line 1, in <module> 
    '120'/100 
TypeError: unsupported operand type(s) for /: 'str' and 'int' 
>>> int('120')/100 
1 
>>> float('120')/100 
1.2 

你的情况，这片：

meal = float(input0.get()) 
tax = float(input1.get()) 
tip = float(input2.get())