def stu(num,nam,sco):

       print("学号：{} 姓名：{} 成绩：{:.2f}".format(num,nam,sco*0.7))

def func(a,b):

    a *= b

     return a

s = func(5,2)

print(s)

def fib(n):

     a,b = 1,1

     for i in range(n-1):

         a,b = b,a+b

     return a

print (fib(7))

def hello_world():

     print('ST',end="*")

def three_hellos():

     for i in range(3):

         hello_world()

three_hellos()

def exchange(a,b):

     a,b = b,a

     return (a,b)

x = 10

y = 20

x,y = exchange(x,y)

print(x,y)

def func(a,b):

   c=a**2+b

  b=a

   return c

a=10

b=100

c=func(a,b)+a

以下选项中描述错误的是

def fact(n):

     if n==0:

         return 1

     else:

         return n*fact(n-1)

num =eval(input("请输入一个整数："))

print(fact(abs(int(num))))

def change(a,b):

    a = 10

    b += a

a = 4

b = 5

change(a,b)

print(a,b)

n = 2

def multiply(x,y = 10):

     global n

     return x*y*n

s = multiply(99,2)

print(s)

n = 2

def multiply(x,y = 10):

     global n

     return x * y * n

s = multiply(10)

print(s)