example_071.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 编写input()和output()函数输入，输出5个学生的数据记录。 '
__author__ = 'Kevin Gong'
N = 3
# stu
# num : string
# name : string
# score[4] : list
student = []
for i in range(5):
student.append(['', '', []])
def input_stu(stu):
for i in range(N):
stu[i][0] = input('input student num:\n')
stu[i][1] = input('input student name:\n')
for j in range(3):
stu[i][2].append(int(input('score:\n')))
def output_stu(stu):
for i in range(N):
print('%-6s%-10s' % (stu[i][0], stu[i][1]))
for j in range(3):
print('%-8d' % stu[i][2][j])
if __name__ == '__main__':
input_stu(student)
print(student)
output_stu(student)
example_072.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 创建一个链表 '
__author__ = 'Kevin Gong'
class Node:
def __init__(self, data):
self.data = data
self.next = None
def get_data(self):
return self.data
class List:
def __init__(self, head):
self.head = head
def is_empty(self):
return self.get_len() == 0
def get_len(self):
length = 0
temp = self.head
while temp is not None:
length += 1
temp = temp.next
return length
def append(self, node):
temp = self.head
while temp.next is not None:
temp = temp.next
temp.next = node
def delete(self, index):
if index < 1 or index > self.get_len():
print('给定的位置不合理')
return
if index == 1:
self.head = self.head.next
return
temp = self.head
cur_pos = 0
while temp is not None:
cur_pos += 1
if cur_pos == index - 1:
temp.next = temp.next.next
temp = temp.next
def insert(self, pos, node):
if pos < 1 or pos > self.get_len():
print('插入节点位置不合理')
return
temp = self.head
cur_pos = 0
while temp is not Node:
cur_pos += 1
if cur_pos == pos - 1:
node.next = temp.next
temp.next = node
break
temp = temp.next
def reverse(self, head):
if head is None and head.next is None:
return head
pre = head
cur = head.next
while cur is not None:
temp = cur.next
cur.next = pre
pre = cur
cur = temp
head.next = None
return pre
def print_list(self, head):
init_data = []
while head is not None:
init_data.append(head.get_data())
head = head.next
return init_data
if __name__ == '__main__':
head = Node('head')
link = List(head)
for i in range(10):
node = Node(i)
link.append(node)
print(link.print_list(head))
example_073.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 反向输出链表 '
__author__ = 'Kevin Gong'
class Node:
def __init__(self, data):
self.data = data
self.next = None
def get_data(self):
return self.data
class List:
def __init__(self, head):
self.head = head
def is_empty(self):
return self.get_len() == 0
def get_len(self):
length = 0
temp = self.head
while temp is not None:
length += 1
temp = temp.next
return length
def append(self, node):
temp = self.head
while temp.next is not None:
temp = temp.next
temp.next = node
def delete(self, index):
if index < 1 or index > self.get_len():
print('给定的位置不合理')
return
if index == 1:
self.head = self.head.next
return
temp = self.head
cur_pos = 0
while temp is not None:
cur_pos += 1
if cur_pos == index - 1:
temp.next = temp.next.next
temp = temp.next
def insert(self, pos, node):
if pos < 1 or pos > self.get_len():
print('插入节点位置不合理')
return
temp = self.head
cur_pos = 0
while temp is not Node:
cur_pos += 1
if cur_pos == pos - 1:
node.next = temp.next
temp.next = node
break
temp = temp.next
def reverse(self, head):
if head is None and head.next is None:
return head
pre = head
cur = head.next
while cur is not None:
temp = cur.next
cur.next = pre
pre = cur
cur = temp
head.next = None
return pre
def print_list(self, head):
init_data = []
while head is not None:
init_data.append(head.get_data())
head = head.next
return init_data
if __name__ == '__main__':
head = Node('head')
link = List(head)
for i in range(10):
node = Node(i)
link.append(node)
print(link.print_list(head))
print(link.print_list(link.reverse(head)))
example_074.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 列表排序及连接 '
__author__ = 'Kevin Gong'
a = [2, 6, 8]
b = [7, 0, 4]
a.extend(b)
a.sort()
print(a)
example_075.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 放松一下，算一道简单的题目 '
__author__ = 'Kevin Gong'
if __name__ == '__main__':
for i in range(5):
n = 0
if i != 1:
n += 1
if i == 3:
n += 1
if i == 4:
n += 1
if i != 4:
n += 1
if n == 3:
print(64 + i)
example_076.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 编写一个函数，输入n为偶数时，调用函数求1/2+1/4+...+1/n,当输入n为奇数时，调用函数1/1+1/3+...+1/n '
__author__ = 'Kevin Gong'
def peven(n):
i = 0
s = 0.0
for i in range(2, n + 1, 2):
s += 1.0 / i
return s
def podd(n):
s = 0.0
for i in range(1, n + 1, 2):
s += 1.0 / i # Python里，整数除整数，只能得出整数，所以需要使用 浮点数 1.0
return s
def dcall(fp, n):
s = fp(n)
return s
if __name__ == '__main__':
n = int(input('input a number: '))
if n % 2 == 0:
sum = dcall(peven, n)
else:
sum = dcall(podd, n)
print(sum)
example_077.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 循环输出列表 '
__author__ = 'Kevin Gong'
raw = ['apple', 'orange', 'pich', 'banana','1024']
for i in range(len(raw)):
print(raw[i])
example_078.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 找到年龄最大的人，并输出。 '
__author__ = 'Kevin Gong'
if __name__ == '__main__':
person = {'Kevin':29, 'Scarf':18, 'Sun':40, 'Cidy':3}
m = 'Kevin'
for key in person.keys():
if person[m] < person[key]:
m = key
print('姓名：%s, 年龄：%d' % (m, person[m]))
example_079.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 字符串排序 '
__author__ = 'Kevin Gong'
raw = ['abcde', 'efdis', 'adk']
raw.sort()
print(raw)
example_080.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
' 猴子分桃 '
__author__ = 'Kevin Gong'
if __name__ == '__main__':
i = 0
j = 1
x = 0
while i < 5:
x = 4 * j
for i in range(0, 5):
if x % 4 != 0:
break
else:
i += 1
x = (x / 4) * 5 + 1
j += 1
print(x)
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