202503python四级选择题

def s(n):

    if n==3:

        return 4

    else:

        return n+s(n-1)

print(s(5))

def s(n):

    s=1

    for a in range(1,5):

              ①       

    return s

print(s(4))

def s(n):

    if n < 8:

        return str(n)

    else:

        return _____________

m = s(int(input("输入十进制数字：")))

print("转换后八进制数是：",m)

def nxs(n):

    s = 0

    while n >0:

        s = s * 10 + n % 10

        n //= 10

    return s

print(nxs(123))

def prime(n):

    for i in range(2,n):

        if n % i == 0:

            return 0

    return 1

c = 0

for i in range(2,10):

    if prime(i):

        c += 1

def zdz(s):

    m = s[0]

    for i in s[1:]:

        if i > m:

            m = i

    return m

print(zdz('abc789XYZ'))

n = 10

def fun():

    global n

    n = n ** 2

    print(n)

fun()

print(n)

def fun(a, b):

    return a * b

def fun(r, pi=3.14):

    return r * r * pi

print(fun(10, 3))

def fun(arr):  

    if len(arr) == 1:

        return arr[0]

    mid = len(arr) // 2

    left = fun(arr[:mid])

    right = ____________

    return left + right

arr = [1,2,3,4,5,6,7,8,9,10]

print(fun(arr))