实验一
实验源码
1 print(sum) 2 sum = 42 3 print(sum) 4 5 def inc(n): 6 sum = n +1 7 print(sum) 8 return sum 9 10 sum = inc(7) +inc(7) 11 print(sum)
实验截图
实验二
task2.1Python
实验源码
1 def func1(a,b,c,d,e,f): 2 return [a,b,c,d,e,f] 3 4 def func2(a,b,c,*,d,e,f): 5 return [a,b,c,d,e,f] 6 7 def func3(a,b,c,/,d,e,f): 8 return [a,b,c,d,e,f] 9 10 print(func1(1,9,2,0,5,3)) 11 print(func1(a=1,b=9,c=2,d=0,e=5,f=3)) 12 print(func1(1,9,2,d=0,e=5,f=3)) 13 14 print(func2(11,99,22,d=0,e=55,f=33)) 15 print(func2(a=11,b=99,c=22,d=0,e=55,f=33)) 16 17 18 print(func3(111,999,222,0,555,333)) 19 print(func3(111,999,222,d=0,e=555,f=333))
实验截图
task2.2Python
实验源码
1 list1 = [1,9,8,4] 2 3 print(sorted(list1)) 4 print(sorted(list1,reverse=True)) 5 print(sorted(list1,True))
实验截图
task2.3Python
实验源码
1 def func(a,b,c,/,*,d,e,f): 2 return([a,b,c,d,e,f]) 3 4 print(func(1,2,3,d=4,e=5,f=6))
实验截图
实验三
实验源码
1 def solve(a, b, c):
2 '''
3 求解一元二次方程, 返回方程的两个根
4 :para: a,b,c: float 方程系数
5 :return: tuple
6 '''
7 delta = b*b - 4*a*c
8 delta_sqrt = abs(delta)**0.5
9 p1 = -b/2/a
10 p2 = delta_sqrt/2/a
11
12 if delta >= 0:
13 root1 = p1 + p2
14 root2 = p1 - p2
15 else:
16 root1 = complex(p1, p2)
17 root2 = complex(p1, -p2)
18
19 return root1, root2
20
21 print(solve.__doc__)
22 while True:
23 try:
24 t = input('输入一元二次方程系数a b c, 或者，输入#结束: ')
25 if t == '#':
26 print('结束计算，退出')
27 break
28 a, b, c = map(float, t.split())
29 if a == 0:
30 raise ValueError('a = 0, 不是一元二次方程')
31 except ValueError as e:
32 print(repr(e))
33 print()
34 except:
35 print('有其它错误发生\n')
36 else:
37 root1, root2 = solve(a, b, c)
38 print(f'root1 = {root1:.2f}, root2 = {root2:.2f}')
39 print()
实验截图
实验四
实验源码
1 def list_generator(a,b,c=1): 2 if type(c)==type(1): 3 b = b + 1 4 lst = range(a,b,c) 5 else: 6 b = b +0.5 7 lst = [] 8 x = a 9 while (x<b): 10 lst.append(x) 11 x +=c 12 return list(lst) 13 14 15 list1 = list_generator(-5, 5) 16 print(list1) 17 18 list2 = list_generator(-5, 5, 2) 19 print(list2) 20 21 list3 = list_generator(1, 5, 0.5) 22 print(list3)
实验截图
实验五
实验源码
1 def is_prime(n):
2 if n == 2:
3 return True
4 elif n != 1:
5 for i in range(2,n):
6 if n == 2:
7 return True
8 elif n % i == 0:
9 break
10 else:
11 return True
12
13 for i in range(2,20+1,2):
14 flag = True
15 for j in range(2, i):
16 if is_prime(j) == True and is_prime(i - j) == True and flag == True:
17 print(f'{i}={j}+{i-j}')
18 flag = False
实验六
实验源码
1 def encoder(text):
2 ls=list(text)
3 for i in range(len(ls)):
4 if 'a'<=ls[i].lower()<='u':
5 ls[i]=chr(ord(ls[i])+5)
6 elif 'v'<=ls[i].lower()<='z':
7 ls[i]=chr(ord(ls[i])-21)
8 else:
9 pass
10 return ''.join(ls)
11
12 def decoder(text):
13 ls=list(text)
14 for i in range(len(ls)):
15 if 'f'<=ls[i].lower()<='z':
16 ls[i]=chr(ord(ls[i])-5)
17 elif 'a'<=ls[i].lower()<='e':
18 ls[i]=chr(ord(ls[i])+21)
19 else:
20 pass
21 return ''.join(ls)
22
23
24 text = input('输入英文文本: ')
25
26 encoded_text = encoder(text)
27 print('编码后的文本: ', encoded_text)
28
29 decoded_text = decoder(encoded_text)
30 print('对编码后的文本解码: ', decoded_text)
实验七
实验源码
1 def collatz(n):
2 x=[n]
3 while x[-1]!=1:
4 if n%2==0:
5 n=n//2
6 x.append(n)
7 else:
8 n=n*3+1
9 x.append(n)
10 return x
11
12 try:
13 n=int(input('Enter a positive integer:'))
14 if n<=0:
15 raise
16 except:
17 print('Error: must be a positive integer')
18 else:
19 print(collatz(n))
实验截图
实验八
实验源码
1 def func(n):
2 if n == 1:
3 ans = 2 - 1
4 else:
5 ans = 2 * func(n-1) +1
6 n -= 1
7 return ans
8 while True:
9 x = input()
10 if x == '#':
11 print('计算结束')
12 break
13 n = int(x)
14 ans = func(n)
15 print(f'n = {n}, ans = {ans}')
实验截图
