如何解决 while 循环不取 0 或小于它的值的情况？

Question

我无法计算并且 while 循环中的哨兵值等于或小于 0 所需的总长度纵向 = 6 m 所需的总长度横向 = 5 m程序能够满足length和bread等于0的条件存在循环但不存在小于0的负数我无法计算总长度并将其设为整数。length = float    width = float    sentinal = 0    d1 = 1d2 = 1for i in range(20):    while d1 != sentinal and d2 != sentinal:        d1 = float(input("enter room dimension1 (m):"))        d2 = float(input("enter room dimension2 (m):"))        if d1 > d2:                length = d1                width = d2                print("length = %.3f m" %(length))                print("width = %.3f m" %(width))        elif d2 > d1:                length = d2                width = d1                print("length = %.3f m" %(length))                print("width = %.3f m"%(width))

Answer 1

请注意：如果这是作业请不要在没有理解一切的情况下盲目复制代码，我会尽力通过#注释解释代码

import math  # required to use ceil() function , ex: ceil(3.2) = 4

def required_length(a, b):  # functions make your code organized

    length = max(a,b)

    width = min(a,b)

    print('length = ', length)

    print('width = ', width)

    print('Total length required lengthways = ', math.ceil(length))

    print('Total length required widthways = ', math.ceil(width))

    print()  # to look nice  print empty line for getting new input

while True:  # loop forever

    a = float(input('enter room dimension 1 (m): '))

    b = float(input('enter room dimension 2 (m): '))

    if a <= 0 or b <= 0:  # exit loop if user entered zero or minus

        print('invalid dimensions')

        break

    required_length(a, b)  # call our function

Answer 2

刚刚写了一个优化代码

sentinal = True    

while sentinal:

        d1 = float(input("enter room dimension1 (m): "))

        d2 = float(input("enter room dimension2 (m): "))

        if 0 in (d1,d2) or 0.0 in (d1,d2):

            sentinal=False

        else:

            length, width = (d1,d2) if d1>d2 else  (d2,d1)

            print("leangth = %.3f m" %(length))

            print("width = %.3f m" %(width))

Answer 3

   sentinal = 0

    d1 = 1.0

    d2 = 1.0

    while d1 > sentinal and d2 > sentinal:

        d1 = float(input("enter room dimension1 (m):"))

        d2 = float(input("enter room dimension2 (m):"))

        if d1 > d2:

                length = d1

                width = d2

                print("length = %.3f m" %(length))

                print("width = %.3f m" %(width))

                print("Total length required lengthways: ", int(length)+1))

                print("Total length required widthways: ", int(width)+1))

        else:

                length = d2

                width = d1

                print("length = %.3f m" %(length))

                print("width = %.3f m"%(width))

                print("Total length required lengthways: ", int(length)+1))

                print("Total length required widthways: ", int(width)+1))