python - 复利的 Python 递归

Question

我正在尝试在 Python 中构建一个递归函数来查找复利。到目前为止，这是我的代码。

def compound_interest(principal, rate, years):
    return principal*(1 + rate)**years

def compound_interest_recursive(principal, rate, years)
    if years == 0:
        return principle
    else:
        return 



principal_str = input("Enter the principal ")
principal = int(principal_str)

rate_float = input("Enter the interest rate ")
rate = float(rate_float)

years_str = input("Enter the number of years ")
years = int(years_str)

print("Principal after", years,"year(s) is",compound_interest\
      (principal, rate, years))

有人可以告诉我我错过了什么吗？谢谢。我试图让它输入数字然后打印出来。

Answer 1

Answer 2

def compound_interest(prin,rate,year):
    if year<=0:

        return prin
    else:
        return compound_interest(prin+prin*rate/100,rate,year-1)

 compound_interest(100000,12,3)
 140492.8