我需要在for循环中使用正确的范围。

Question

我正试着打印一张价值表，告诉科学家在兔子用完笼子之前可以让它们继续繁殖几个月。我不知道在for循环中使用什么范围。我需要它停止一旦兔子的总数超过笼子的数目，即输入。以下是我所拥有的：

cages = int(input("How many cages do you have? "))

print("Month\t", "Adults\t", "Babies\t", "Total")

def fib(n):
    if n < 2:
        return n
    return fib(n-2) + fib(n-1)
n = 1

total = fib(n+2)
adults = fib(n+1)
babies = fib(n)
if total < cages:
    ## dont know what to put in range here to make the loop stop at the 
    ## correct place
    for n in range(cages):
        print((n+1),  "\t", fib(n + 1), "\t", fib(n), "\t", fib(n+2))

print("You ran out of cages!")

“笼子”似乎不是正确的范围，因为这样总数就会比笼子的数量大得多。

Answer 1

你需要的是break。试试像这样的东西

for n in range(cages):
     total = fib(n+2)
     adults = fib(n+1)
     babies = fib(n)
     if total > cages:
          break

     print((n+1),  "\t", fib(n + 1), "\t", fib(n), "\t", fib(n+2))