構建兩位數的簡單操作型計算器？停留在錯誤

Question

print("Welcome to MusCalculator") 
print("For adding two no type add") 
print("for mutiplying type multiply") 
print("for subtraction type subtract") 
print("for dividing type divide") 

def add_numbers(x, y): 
    if input == "addition": 
     addition = x + y 
     print addition 

    if input == "multiply": 
     multiply = x*y 
     print multiply 

    if input == "subtract": 
     if x > y: 
      sub = x - y 
      print sub 
     else: 
      sub = y - x 
      print sub 

    if input == "divide": 
     div = x/y 
     print div 
    else: 
     print("Use me if you know me") 



x = input("First No.") 
y = input("Second No.") 
addition = x + y 
c = input("Type Operation") 

add_numbers(x, y) 

誤差

Traceback (most recent call last): 
    File "C:\Users\Aafaq\workspace\python\project 1.py", line 34, in <module> 
    c = input("Type Operation") 
    File "C:\Program Files (x86)\eclipse\plugins\org.python.pydev_4.5.5.201603221110\pysrc\pydev_sitecustomize\sitecustomize.py", line 141, in input 
    return eval(raw_input(prompt)) 
    File "<string>", line 1, in <module> 
NameError: name 'addition' is not defined 

Answer 1

有在你的代碼中的一些問題。一些在下面提到。 在您的主代碼中使用了加法變量，您可能想要嘗試使用不同的名稱或聲明加法作爲全局變量。

之下或之上打印語句： 相加= 0

而且要設置接收的操作爲變量名C，這是沒有在任何地方提到，本來應該設置爲變量名輸入（這是一個系統定義函數名稱，您不應該使用該名稱與字符串進行比較）。

你可能嘗試做這樣的事情：

operation = " " 
addition = 0 
def add_numbers(x, y): 
    if operation == "addition": 
     addition = x + y 
     print addition 

    if input == "multiply": 
     multiply = x*y 
     print multiply 

    if operation == "subtract": 
     if x > y: 
      sub = x - y 
      print sub 
     else: 
      sub = y - x 
      print sub 

    if operation == "divide": 
     div = x/y 
     print div 
    else: 
     print("Use me if you know me") 


x = input("First No.") 
y = input("Second No.") 
addition = x + y 
operation = input("Type Operation") 

add_numbers(x, y)