python 从键盘输入若干个整数，当输入"-1""时输入结束，请统计最大值、最小值和平均数

上面题目代码如下：

第一种方法列表方法求：

a=[]
b = int(input())
while True:
    if b == -1:
        break
    a.append(b)
    b=int(input())
    if b==-1:
        break
if b==-1:
    print('Count is 0')
    print(f'Max number is 0')
    print(f'Min number is 0')
    print('The average number is 0')
else:
    print('Count is ' + str(len(a)))
    print(f'Max number is{max(a)}')
    print(f'Min number is{min(a)}')
    print('The average number is ' + str(sum(a) / len(a)))

第二种方法，冒泡排序算法求得

arr=[]
while True:
    a = int(input())
    if a==-1:
        break
    # 遍历所有数组元素
    arr.append(a)
    print(type(arr))
    for i in range(len(arr)):
        # Last i elements are already in place
        for j in range(0, len(arr) - i - 1):
            if arr[j] > arr[j + 1]:
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
if a==-1:
    print('Count is 0' )
    print(f'Max number is 0')
    print(f'Min number is 0')
    print('The average number is 0' )
else:
    print('Count is ' + str(len(arr)))
    print(f'Max number is{arr[0]}')
    print(f'Min number is{arr[-1]}')
    print('The average number is ' + str(sum(arr) / len(arr)))

代码中，考虑到-1这种情况，做了如下处理：