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所以我試圖實現在Python 分搜索算法返回一個「最佳」的儲蓄率。Python的平分搜索 - ABS（）導致失敗
我試圖創造一些不同的功能，我不明白爲什麼程序跑在一個無限循環抓獲。我知道abs（current_savings - down_payment）是導致遞歸無限循環的原因，但我不知道爲什麼。第一
第一件事，這並不能真正解釋爲什麼我的程序不工作，但這裏有雲：
在每個月我賺取活期儲蓄利息，這是 應用第一年底，然後我收到我的月薪，這只是我年薪的 1/12。
我試圖找到適用於我的月薪的最佳費率，然後添加到我目前的儲蓄。
我的第一個功能簡單的檢查，看看如果一個人的工資高到足以永遠保存爲250K首付。如果他們的薪水不夠高，則會打印出不足並返回False。
我的第二個函數試圖找到最好的速率（「部分保存」），或以落入100美元down_payment內保存月薪的最佳速度。另外，我必須記錄我的平分搜索功能用來找到最優速度的「步驟」數量。
下面是代碼：
#Givens
annual_salary = 150000
initial_salary = annual_salary
interest_rate = float(0.04/12.0)
down_payment = float(250000.0)
semi_annual_raise = 0.07
#Bisect-search
low = float(0.0)
high = float(10000.0)
portion_saved = float((low+high)/2)
current_savings = 0
months = 0
steps = 0
def isPossible(annual_salary):
count = 0
current_savings = 0
while count < 36:
current_savings += (current_savings*interest_rate) + (annual_salary/12)
count += 1
if count % 6 == 0:
annual_salary += (annual_salary*semi_annual_raise)
if current_savings < down_payment:
print("It is not possible to pay the down payment in three years.")
return False
else:
return True
def bisearch(initial_salary,interest_rate,down_payment,semi_annual_raise,low,high,portion_saved,steps):
current_savings = 0
months = 0
while abs(current_savings - down_payment) > 100.0:
months = 0
current_savings = 0
while months < 36:
current_savings = current_savings + (initial_salary*interest_rate)
current_savings = current_savings + (initial_salary/12*portion_saved/10000.0)
months += 1
if months % 6 == 0:
initial_salary += (initial_salary*semi_annual_raise)
steps += 1
if current_savings > down_payment:
high = portion_saved
else:
low = portion_saved
portion_saved = ((low+high)/2.0)
print("Best saving rate: ", (portion_saved/10000.0))
print("Steps in bisection search: ", steps)
if isPossible(annual_salary) == True:
bisearch(initial_salary,interest_rate,down_payment,semi_annual_raise,low,high,portion_saved,steps)
而且測試用例：
注：的的分搜索步數不必相同，但幅度應該是同樣
測試案例1
Enter the starting salary: 150000
Best savings rate: 0.4411
Steps in bisection search: 12
測試案例2
Enter the starting salary: 300000
Best savings rate: 0.2206
Steps in bisection search: 9
如果有人可以幫助我，我將不勝感激，一直在這幾個小時試圖拿出一個修補程序。