实验 7

 
1 class Account:
 2    def __init__(self, name, account_number, initial_amount = 10):
 3          self._name = name
 4          self._card_no = account_number
 5          self._balance = initial_amount
 6    def deposit(self, amount):
 7          self._balance += amount
 8    def withdraw(self, amount):
 9         if self._balance < amount:
10             print('余额不足')
11         return
12 
13         self._balance -= amount
14 
15    def info(self):
16          print('持卡人姓名:', self._name)
17          print('持卡人账号:', self._card_no)
18          print('持卡人账户余额:', self._balance)
19    def get_balance(self):
20          return self._balance
21 def main():
22      print('测试账户1：'.center(30, '*'))
23      a1 = Account('Bob', '5002311', 20000)
24      a1.deposit(5000)
25      a1.withdraw(4000)
26      a1.info()
27      print()
28      print('测试账户2：'.center(30, '*'))
29      a2 = Account('Joe', '5006692', 20000)
30      a2.withdraw(10000)
31      a2.withdraw(5000)
32      a2.info()
33 if __name__ == '__main__':
34      main()

task 2

 1 class Shape:
 2     def info(self):
 3         pass
 4     def area(self):
 5         pass
 6     def preimeter(self):
 7         pass
 8 class Rect(Shape):
 9     def __init__(self, x = 0, y = 0, length = 2, width = 1):
10         self._x = x
11         self._y = y
12         self._width = width
13         self._length = length
14     def info(self):
15         print(f'矩形左上角顶点坐标: ({self._x}, {self._y})')
16         print(f'矩形长: {self._length}')
17         print(f'矩形宽: {self._width}')
18     def area(self):
19         return self._length * self._width
20     def perimeter(self):
21         return (self._length + self._width) * 2
22 class Circle(Shape):
23     def __init__(self, x = 0, y = 0, radius = 1):
24         self._x = x
25         self._y = y
26         self._r = radius
27     def info(self):
28         print(f'圆心: ({self._x}, {self._y})')
29         print(f'半径: {self._r}')
30     def area(self):
31         return 3.14 * self._r * self._r
32     def perimeter(self):
33         return 2 * 3.14 * self._r
34 class Triangle(Shape):
35     def __init__(self, a = 1, b = 1, c = 1):
36         self._a, self._b, self._c = a, b, c
37     def info(self):
38         print(f'三角形三边长: ({self._a}, {self._b}, {self._c})')
39     def area(self):
40         s = (self._a + self._b + self._c) / 2
41         ans = (s*(s - self._a)*(s - self._b)*(s - self._c)) ** 0.5
42         return ans
43     def perimeter(self):
44         return (self._a + self._b + self._c)
45 def main():
46     print('测试1：'.center(40, '*'))
47     shapes_lst1 = [Circle(), Rect(), Triangle()]
48     for t in shapes_lst1:
49         t.info()
50         print(f'面积: {t.area():.2f}')
51         print(f'周长: {t.perimeter():.2f}')
52         print()
53     print('测试2：'.center(40, '*'))
54     shapes_lst2 = [Circle(x = 2, y = 2, radius = 10),
55                    Rect(x = 50, y = 50, length = 10, width = 5),
56                    Triangle(a = 3, b = 4, c = 5)]
57     for t in shapes_lst2:
58         t.info()
59         print(f'面积: {t.area():.2f}')
60         print(f'周长: {t.perimeter():.2f}')
61         print()
62 if __name__ == '__main__':
63     main()

from shape import Rect, Circle


shape_lst = [Rect(5, 5, 10, 5), Circle(), Circle(1, 1, 10)]

for i in shape_lst:
    i.info()
    print(f'面积: {i.area(): .2f}')
    print(f'周长: {i.perimeter(): .2f}')
    print()

from math import *
m = 0
s = 2
def func(x):
    return 1/(sqrt(2*pi)*s)*(exp((-0.5)*((x-m)/s)**2))
print(f'x = 1,f = {func(1):.8f}')
print(f'x = 3,f = {func(3):.8f}')
print(f'x = 5,f = {func(5):.8f}')
print(f'x = 7,f = {func(7):.8f}')
print(f'x = 9,f = {func(9):.8f}')