好的，我的代码出了什么问题？我按下跑步，它没有给我任何东西。在get_num它说“太多的位置参数”，然后它只是有问题。我不确定我做错了什么 它说“函数中没有值为num 1参数调用”和“函数中没有值为num 2参数调用”“未使用的变量答案”
def main(): #control
operation()
get_num(operation)
if operation == "+":
answer = addition()
elif operation == "*":
answer = multiplication()
elif operation == "-":
answer = subtraction()
else:
answer = division()
def operation(): #prompts the user to enter a mathematical symbol & returns that symbol
print("Enter one of the symbols when asked what operation you would like to preform")
operation = input("Would you like to multiply (*), add (+), subtract (-), or divide(/)? ")
return operation
def get_num(): #prompts the user to enter a single integers & returns that value
print("Enter two numbers you would like to calculate")
num1 = float(input("What is the first number you want to calculate? "))
num2 = float(input("What is the second number you want to calculate? "))
return num1
return num2
def addition(num1, num2): #performs addition of the 2 numbers & returns the sum
addition = num1 + num2
return addition
def subtraction(num1, num2): #performs subtraction of the second number from the first & returns the difference
subtraction = num1 - num2
return subtraction
def multiplication(num1, num2): #performs multiplication of the 2 numbers & returns the product
multiplication = num1 * num2
return multiplication
def division(num1, num2): #if the second number is not zero, performs division of the first number (numerator) by the second number (denominator) and returns the quotient; if the second number is zero, doe not perform the division, but displays a message and returns a zero
division = num1 / num2
return division
if num2 == "0":
print("Error, cannot divide by 0")
def show_answer(answer): #displays the answer from the operation
if operation == '*':
print("The answer for your problem is", multiplication)
elif operation == '-':
print("The answer for your problem is", subtraction)
elif operation == '+':
print("The answer for your problem is", addition)
elif operation == '/':
print("The answer for your problem is", division)
else:
print("error")
答案 0 :(得分：0)
嘿，你的程序是用简洁的方式编写的，但你需要将变量传递给函数.....你不能像这样定义全局变量
答案 1 :(得分：0)
以下是我在您的问题/代码中看到的一些问题：
您的代码缩进很差。我不能真正尝试你的代码，因为你有这些奇怪的注释。
您的函数调用必须具有与定义时相同的参数量func(x, y)必须始终使用2个变量声明func('Hello', 'World')
return会返回一个数据，但不会自行保存。如果您对该数据有用，则必须将该值赋给变量。
您不太了解变量的本地和全球范围
无论如何要避免询问＆＃34;为什么我的代码不能正常工作＆＃34;问题
试试这段代码：
def main(): #control
operation = operate()
num1, num2 = get_num()
if operation == "+":
answer = addition(num1, num2)
elif operation == "*":
answer = multiplication(num1, num2)
elif operation == "-":
answer = subtraction(num1, num2)
elif operation == "/":
answer = division(num1, num2)
else:
print ("Invalid Operation")
show_answer(answer)
def operate(): #prompts the user to enter a mathematical symbol & returns that symbol
print("Enter one of the symbols when asked what operation you would like to preform")
operation = input("Would you like to multiply (*), add (+), subtract (-), or divide(/)? ")
return operation
def get_num(): #prompts the user to enter a single integers & returns that value
print("Enter two numbers you would like to calculate")
num1 = float(input("What is the first number you want to calculate? "))
num2 = float(input("What is the second number you want to calculate? "))
return num1, num2
def addition(num1, num2): #performs addition of the 2 numbers & returns the sum
addition = num1 + num2
return addition
def subtraction(num1, num2): #performs subtraction of the second number from the first & returns the difference
subtraction = num1 - num2
return subtraction
def multiplication(num1, num2): #performs multiplication of the 2 numbers & returns the product
multiplication = num1 * num2
return multiplication
def division(num1, num2): #if the second number is not zero, performs division of the first number (numerator) by the second number (denominator) and returns the quotient; if the second number is zero, doe not perform the division, but displays a message and returns a zero
try:
division = num1 / num2
return division
except ZeroDivisionError:
print ("Error, cannot be divided by 0")
def show_answer(answer):
print ("The answer for your problem is", answer)
main()
您也可以更改您的divison的else-if语句，以检查num2的值是否为0：
elif operation == '/':
if num2 == 0:
return ('Error, cannot be divided by 0')
else:
answer = division(num1, num2)
答案 2 :(得分：0)
首先你写了get_num(operation)但是你的函数有0个参数：def get_num():
答案 3 :(得分：0)
需要改进的地方：
Python是一种脚本语言，所以你必须调用底部的main（）函数来启动它
使用raw_input("message")而不是input("mesage")并使用operator = str(raw_input("message"))
您正在呼叫get_num(operation)，但operation()是一个函数，而不是值。也许您应该将get_num(operation)的返回值存储到operator = get_num(operation)
以下是我对您的代码进行一些改进的方法：
def main(): #control
operator = operation()
nums = get_num()
if operator == '+':
answer = addition(nums[0], nums[1])
elif operator == '*':
answer = multiplication(nums[0], nums[1])
elif operator == '-':
answer = subtraction(nums[0], nums[1])
elif operator == '/':
answer = division(nums[0], nums[1])
else:
raise ValueError("'" + operator + "' Operand not recognized")
# Display result
answer = str(answer)
print(str(nums[0]) + operator + str(nums[1]) + " = " + answer)
def operation(): #prompts the user to enter a mathematical symbol & returns that symbol
print("Enter one of the symbols when asked what operation you would like to preform")
operator = raw_input("Would you like to multiply (*), add (+), subtract (-), or divide(/)? ")
# Convert it to a string
return str(operator)
# NOTE - no need to pass the operator
def get_num(): #prompts the user to enter a single integers & returns that value
print("Enter two numbers you would like to calculate")
num1 = float(raw_input("What is the first number you want to calculate? "))
num2 = float(raw_input("What is the second number you want to calculate? "))
# NOTE - Return as an array rather than 2 return statements
return [num1, num2]
def addition(num1, num2): #performs addition of the 2 numbers & returns the sum
addition = num1 + num2
return addition
def subtraction(num1, num2): #performs subtraction of the second number from the first & returns the difference
subtraction = num1 - num2
return subtraction
def multiplication(num1, num2): #performs multiplication of the 2 numbers & returns the product
multiplication = num1 * num2
return multiplication
def division(num1, num2): #if the second number is not zero, performs division of the first number (numerator) by the second number (denominator) and returns the quotient; if the second number is zero, doe not perform the division, but displays a message and returns a zero
# NOTE - Throw an error if denominator is 0
if num2 == 0:
raise ValueError("Divistion by zero")
division = num1 / num2
return division
# Remember to call main() to kick off the program
main()