实验4

 

不是。

line1：全局作用域

line3：全局作用域

line7：局部作用域

line11：全局作用域

def func1(a,b,c,d,e,f):
    return[a,b,c,d,e,f]
def func2(a,b,c,*,d,e,f):
    return [a,b,c,d,e,f]
def func3(a,b,c,/,d,e,f):
    return[a,b,c,d,e,f]
print(func1(1,9,2,0,5,3))
print(func1(a=1,b=9,c=2,d=0,e=5,f=3))
print(func1(1,9,2,f=3,d=0,e=5))

print(func2(11,99,22,d=0,e=55,f=33))
print(func2(a=11,b=99,c=22,d=0,e=55,f=33))

print(func3(111,999,222,0,555,333))
print(func3(111,999,222,d=0,e=555,f=333))

 

def func(a, b, c, /, *, d, e, f):
    return( [a,b,c,d,e,f] )
print(func(1,2,3,d=5,e=6,f=7))

 

def solve(a, b, c):
    delta = b*b - 4*a*c
    delta_sqrt = abs(delta)**0.5
    p1 = -b/2/a
    p2 = delta_sqrt/2/a
    if delta >= 0:
        root1 = p1 + p2
        root2 = p1 - p2
    else:
        root1 = complex(p1, p2)
        root2 = complex(p1, -p2)
    return root1, root2
while True:
    try:
        t = input('输入一元二次方程系数a b c, 或者，输入#结束: ')
        if t == '#':
            print('结束计算，退出')
            break
        a, b, c = map(float, t.split())
        if a == 0:
            raise ValueError('a = 0, 不是一元二次方程')
    except ValueError as e:
        print(repr(e))
        print()
    except:
        print('有其它错误发生\n')
    else:
        root1, root2 = solve(a, b, c)
        print(f'root1 = {root1:.2f}, root2 = {root2:.2f}')
        print()

 

def list_generator(a,b,step=1):
    c=[]
    while a<b:
        c.append(a)
        a+=step
    return c
list1 = list_generator(-5, 5)
print(list1)
list2 = list_generator(-5, 5, 2)
print(list2)
list3 = list_generator(1, 5, 0.5)
print(list3)

 

def is_prime(n):
    a=1
    sum=0
    while a<=n:
        if n%a == 0:
            sum+=1
            a+=1
        else:
            a+=1
    if sum==2:
        return True
    else:
        return False
s=4
x=range(1,21)
n=[]
for i in range(len(x)):
    if is_prime(x[i]) == True:
            n.append(x[i])
while s<=20:
    for c in range(len(n)):
        for d in range(1,c+1):
            if n[c]+n[d]==s:
                print(f'{s}={n[d]}+{n[c]}')
            break
    s+=2

 

def encoder(text):
    text1 = ''
    for i in text:
        if 'a' <= i <= 'z':
            c = 97 + (ord(i) + 5 - 97) % 26
            text1 += chr(c)
        elif 'A' <= i <= 'Z':
            c = 65 + (ord(i) + 5 - 65) % 26
            text1 += chr(c)
        else:
            text1 += i
            return text1
def decoder(text):
    text1 = ''
    for i in text:
        if 'a' <= i <= 'z':
            c = 97 + (ord(i) - 5 - 97) % 26
            text1 += chr(c)
        elif 'A' <= i <= 'Z':
            c = 65 + (ord(i) - 5 - 65) % 26
            text1 += chr(c)
        else:
            text1 += i
            return text1
text = input('输入英文文本: ')
encoded_text = encoder(text)
print('编码后的文本: ', encoded_text)
decoded_text = decoder(encoded_text)
print('对编码后的文本解码: ', decoded_text)

def collatz(n):
    lst = []
    lst.append(n)
    while n != 1:
        if n %2 == 0:
            n = n/2
            lst.append(int(n))
        else:
            n = n*3 +1
            lst.append(int(n))
    return lst
try:
    n = int(input('Enter a positive integer:'))
    if n <= 0:
        raise ValueError
except ValueError:
    print('Error: must be a positive integer')
else:
    print(collatz(n))

def func(n):
    if n == 0:
        return 0
    else:
        return 2*func(n-1) + 1
while True:
    x = input()
    if x == '#':
        print('计算结束')
        break
    n = int(x)
    ans = func(n)
    print(f'n = {n}, ans = {ans}')