程序没有给出想要的 output

Question

I am new to programming and I am stuck with one of my programming assignments. please evaluate the given code and let me know the mistakes I have made. the code is expected to output the number of months required to save up to buy a new house...

total_cost = float(input("cost of house:"))
portion_down_payment= 0.25
current_savings = 0.0
r = .04
annual_salary = float(input("your annual salary is:"))
portion_saved = float(input("portion of income saved:"))   
months = 0

while current_savings <= portion_down_payment*total_cost:
   current_savings = current_savings*r/12 + portion_saved*annual_salary/12
   months = months+1
   
print("To buy your dream house you gotta wait for",months, "months")

Answer 1

You likely want to add to your savings, not overwrite them:

current_savings = current_savings*r/12 + portion_saved*annual_salary/12

should be:

current_savings = current_savings + current_savings*r/12 + portion_saved*annual_salary/12