如何計算用戶輸入的平均值？ -Python-

Question

這些問題要求我們創建一個 Python 程序，要求用戶輸入汽車數量、停車時長和停車費，並計算其總費用和總平均數。 我能夠找到我需要的一切，除了總平均值。

sum = 0.00
fee = 0
avg = 0

x = int(input("Number of cars:"))

while x > 0:
    y = float(input("Duration of parking:"))
    if y <= 3:
        fee = 2
        print("Fee: 2")
    elif 3 < y <= 23
        fee = 2 + (0.05 * y)
    elif y == 24:
        fee = 10
        print("Fee: 10")
    x = x - 1
    sum = sum + fee
    avg = sum / x
print("Total fees:", sum)
print("Average:")

這是我的代碼，唯一的問題是平均值。 它給了我一個 'ZeroDivisionError: float division zero' for my 'avg = sum / x' 所以它基本上是說我的 x 為零，我不知道為什么或如何解決它。 我幾乎什么都試過了。 請幫忙。

Answer 1

您的算法除以汽車數量x ，但相同的變量用於遞減。

提議：

• 請求汽車號碼並將其存儲到另一個變量中，
• 僅在計算完所有費用后才在最后進行平均計算。

例如：

n_cars = x = int(input("how many cars?")

while x > 0:
    # more stuff
    ...
    sum += fee

...
avg = sum / n_cars
...

Answer 2

這是一個更簡單的工作實現，代碼更短更清晰：

import math

MIN_FEE = 2.0
MAX_FEE = 10

x = int(input("How many cars?: "))
cost = 0

for _ in range(x):
    y = float(input("Parking duration for car: "))
    fee = min(math.ceil(max(MIN_FEE, (y + 1) * 0.5)), MAX_FEE)
    print(f"Parking fee (RM): {fee}")
    cost += fee

print("Total Fee (RM):", cost)
print("Average (RM):", cost / x)

請注意，您通常不需要多次復制粘貼同一塊，因為它是不可讀的。

Answer 3

問題是您在每次迭代時都在減少x並且它最終變為0 ，因此您會收到錯誤。

要么使用for循環迭代n輸入，要么使用兩個對象，一個用於迭代，另一個用於計算平均值。

此外，您需要計算while循環之外的平均值。

嘗試這個：

sum = 0.00
fee = 0
avg = 0

x = int(input("How many cars?: "))
z = x

while x > 0:
    y = float(input("Parking duration for car: "))
    if y <= 3:
        fee = 2
        print("Parking fee (RM): 2")
    elif 3 < y <= 4:
        fee = 2.50
        print("Parking fee (RM): 2.50")
    elif 4 < y <= 5:
        fee = 3
        print("Parking fee (RM): 3")
    elif 5 < y <= 6:
        fee = 3.50
        print("Parking fee (RM): 3.50")
    elif 6 < y <= 7:
        fee = 4
        print("Parking fee (RM): 4")
    elif 7 < y <= 8:
        fee = 4.50
        print("Parking fee (RM): 4.50")
    elif 8 < y <= 9:
        fee = 5
        print("Parking fee (RM): 5")
    elif 9 < y <= 10:
        fee = 5.50
        print("Parking fee (RM): 5.50")
    elif 10 < y <= 11:
        fee = 6
        print("Parking fee (RM): 6")
    elif 11 < y <= 12:
        fee = 6.50
        print("Parking fee (RM): 6.50")
    elif 12 < y <= 13:
        fee = 7
        print("Parking fee (RM): 7")
    elif 13 < y <= 14:
        fee = 7.50
        print("Parking fee (RM): 7.50")
    elif 14 < y <= 15:
        fee = 8
        print("Parking fee (RM): 8")
    elif 15 < y <= 16:
        fee = 8.50
        print("Parking fee (RM): 8.50")
    elif 16 < y <= 17:
        fee = 9
        print("Parking fee (RM): 9")
    elif 17 < y <= 18:
        fee = 9.50
        print("Parking fee (RM): 9.50")
    elif 18 < y <= 24:
        fee = 10
        print("Parking fee (RM): 10")
    x = x - 1
    sum = sum + fee

avg = sum / z
print("Total Fee (RM):", sum)
print("Average (RM):")