沒有得到正確的輸出...邏輯正確

我的代碼給出正確的結果，除了balance = 3926。最低支付金額：370，而應該是360.程序應該按照給定的年利率打印最低月付款。給定初始餘額，代碼應該在年底計算餘額。我們正在嘗試每月支付10美元的初始餘額。如果年底餘額有餘額，我們會編寫代碼將餘額重置爲初始餘額，將付款額增加10美元，然後再次嘗試（使用相同的代碼！）以計算餘額這一年，看看這個新的支付值足夠沒有得到正確的輸出...邏輯正確

annualInterestRate = 0.2 

balance = 3926 

monthlyinterestrate = annualInterestRate/12.0 

remainingBalance = balance 

month = 1 
total = 0 

payment = 10 

def CheckMinimumPayment(payment,balance): 

    "Checking if payment is in correct balance" 
    while(payment*12 < balance): 

     payment += 10 
    return payment 

payment = CheckMinimumPayment(payment,balance) 

while(month <= 12): 
    remainingBalance = remainingBalance - payment + (annualInterestRate/12.0) * (remainingBalance - payment) 
    month += 1 
    total += payment 


payment = CheckMinimumPayment(payment,total+remainingBalance) 

print("Lowest Payment: " + str(payment))

來源

2013-02-25 user1437027

而*爲什麼*是360不正確？計算結果是什麼，你能爲我們解決這個問題嗎？ – 2013-02-25 16:47:59

發佈時，請確保將您的代碼放入代碼塊（這是「{}」按鈕）。我是第二個爲你解決它的人。 – n00dle 2013-02-25 16:50:12

根據程序的回答是370，但它應該是360 – user1437027 2013-02-25 16:51:00

大的問題是，你不會再迭代通過興趣環路（你有什麼作爲while(month <= 12)）每次嘗試新的付款時間。將該循環寫入一個函數，並在每次嘗試新付款時調用它。欠款餘額取決於付款情況，因爲每個月的較大付款意味着每月增加的利息較少。這是我用的：

annualInterestRate = 0.2 
init_balance = 3926 

monthlyInterestRate = annualInterestRate/12.0 
init_payment = 10 

def owedBalance(payment,balance): 
    """ Calculate total owed balance after one year 
     given an initial balance and montly payment""" 

    for month in range(12): 
     balance = (balance - payment) * (monthlyInterestRate + 1) 

    return payment*12 + balance 

def CheckMinimumPayment(payment,balance): 
    "Checking if payment is in correct balance" 

    while (payment*12 < owedBalance(payment, balance)): 
     payment += 10 

    return payment 

min_payment = CheckMinimumPayment(init_payment,init_balance) 

print("Lowest Payment: {}".format(min_payment))

來源

2013-02-25 16:55:53 askewchan

沒有得到正確的輸出...邏輯正確

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