实验七

实验任务1

实验源码：

class Account:
    def __init__(self, name, account_number, initial_amount = 10):
        self._name=name
        self._card_no=account_number
        self._balance=initial_amount

    def deposit(self,amount):
        self._balance+=amount

    def withdraw(self,amount):
        if self._balance<amount:
            print('余额不足')
            return

        self._balance-=amount

    def info(self):
        print('持卡人姓名：',self._name)
        print('持卡人账号：',self._card_no)
        print('持卡人账户余额：',self._balance)

    def get_balance(self):
        return self._balance

def main():
    print('测试账户1：'.center(30,'*'))
    a1=Account('Bob','5002311',20000)
    a1.deposit(5000)
    a1.withdraw(4000)
    a1.info()

    print()

    print('测试账户2：'.center(30,'*'))
    a2=Account('Joe','5006692',20000)
    a2.withdraw(10000)
    a2.withdraw(5000)
    a2.info()

if __name__=='__main__':
    main()

实验任务2

class Shape:
    def info(self):
        pass

    def area(self):
        pass

    def perimeter(self):
        pass


class Rect(Shape):
    def __init__(self,x=0,y=0,length=2,width=1):
        self._x=x
        self._y=y
        self._width=width
        self._length=length

    def info(self):
        print(f'矩形左上角顶点坐标：({self._x},{self._y})')
        print(f'矩形长:{self._length}')
        print(f'矩形宽:{self._width}')

    def area(self):
        return self._length*self._width

    def perimeter(self):
        return (self._length+self._width)*2

class Circle(Shape):
    def __init__(self,x=0,y=0,radius=1):
        self._x=x
        self._y=y
        self._r=radius

    def info(self):
        print(f'圆心:({self._x},{self._y})')
        print(f'半径:{self._r}')

    def area(self):
        return 3.14*self._r*self._r

    def perimeter(self):
        return 2*3.14*self._r


class Triangle(Shape):
    def __init__(self,a=1,b=1,c=1):
        self._a,self._b,self._c=a,b,c

    def info(self):
        print(f'三角形三边长:({self._a},{self._b},{self._c})')

    def area(self):
        s=(self._a+self._b+self._c)/2
        ans=(s*(s-self._a)*(s-self._b)*(s-self._c))**0.5

        return ans

    def perimeter(self):
        return(self._a+self._b+self._c)


def main():
    print('测试1:'.center(40,'*'))

    shapes_lst1=[Circle(),Rect(),Triangle()]

    for t in shapes_lst1:
        t.info()
        print(f'面积：{t.area():.2f}')
        print(f'周长：{t.perimeter():.2f}')
        print()

    print('测试2：'.center(40,'*'))

    shapes_lst2=[Circle(x=2,y=2,radius=10),
                 Rect(x=50,y=50,length=10,width=5),
                 Triangle(a=3,b=4,c=5)]

    for t in shapes_lst2:
        t.info()
        print(f'面积：{t.area():.2f}')
        print(f'周长：{t.perimeter():.2f}')
        print()


if __name__=='__main__':
    main()

 

task2_2.py

实验源码：

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 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()

实验任务3

实验源码：

 

 

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}')