Question

我正在修读课程6.00.1x计算机科学与编程简介。我被要求提出一个计划，计算一年内偿还信用卡余额所需的最低还款额。为此，我需要使用二分法。

我已经提出了这段代码（请参见下文）。当我运行代码时，我得到29591.55作为答案;但是，我打算得到29157.09。

任何人都可以帮助我解决我出错的地方吗？

balance = 320000
annualInterestRate = 0.2
monthlyInterestRate = annualInterestRate/12.0
lowerRepayment = balance/12
upperRepayment = (balance * (1 + monthlyInterestRate)**12)/12
repayment = (lowerRepayment + upperRepayment)/2
unpaidBalance = balance
while unpaidBalance >= 0:
    repayment = round(((lowerRepayment + upperRepayment)/2), 2)
    unpaidBalance = balance
    numberOfRepayments = 0
    while numberOfRepayments < 12 and unpaidBalance >= 0:
        numberOfRepayments += 1
        monthlyUnpaidBalance = unpaidBalance - repayment
        increment = monthlyUnpaidBalance * monthlyInterestRate
        unpaidBalance = monthlyUnpaidBalance + increment
    if unpaidBalance < -0.01:
        lowerRepayment = repayment
    elif unpaidBalance > 0.01:
        upperRepayment = repayment
print 'Lowest Payment: ' + str(repayment)

Answer 1

你必须改变条件如果unpaidBalance＆gt; 0.01： lowerRepayment =还款 elif unpaidBalance＆lt; -0.01： upperRepayment =还款 2.当unpaidBalance介于-0.01和0.01之间时，使你的循环结束

二分法计算信用卡还款

1 个答案: