python - 迭代计数器 Python3x

Question

所以我用 Python 构建了一个简单的计算器，用户输入两个数字和一个运算符，然后给出答案。他们还可以选择再次运行计算器。我想对答案进行编号，以便每个答案显示为“答案 1 等于 x”、“答案 2 等于 x”等，具体取决于计算器运行的次数。每次我尝试格式化计数器来计算迭代次数时，它都不起作用，并且只能一遍又一遍地标记它们“答案 1”。任何帮助将不胜感激。我对 Python 非常陌生。

answer = "y"

while ((answer == "Y") or (answer == "y") or (answer == "Yes") or (answer == "yes")):
    numones = input ("Give me a number: ")
    numtwos = input ("Give me another number: ")

    numone = float(numones)
    numtwo = float(numtwos)

    operation = input ("Give me an operation (+,-,*,/): ")

    counter = 0
    for y in answer:
        counter += 1

    if (operation == "+"):
        calc = numone + numtwo
        print ("Answer " + str(counter) + " is " + str(calc))
    elif (operation == "-"):
        calc = numone - numtwo
        print ("Answer " + str(counter) + " is " + str(calc))
    elif (operation == "*"):
        calc = numone * numtwo
        print ("Answer " + str(counter) + " is " + str(calc))
    elif (operation == "/"):
        calc = numone / numtwo
        if (numtwo != 0):
            print ("Answer " + str(counter) + " is " + str(calc))
        else:
            print ("You can't divide by zero.")
    else:    
        print ("Operator not recognized.")

    answer = input ("Do you want to keep going? ")
    if ((answer == "Y") or (answer == "y") or (answer == "Yes") or (answer == "yes")):
        print ()
    else:
        print ("Goodbye.")
        break

Answer 1

删除 while 循环中分配的 counter = 0。并将此声明移至 while 循环上方。

还有行:

for y in answer:
    counter += 1

真的很令人困惑，而且肯定是错误的，因为如果你得到"is"作为答案，你将获得 +3 的增长。只需递增(counter += 1) counter，无需任何for循环。