526互联

magic book

发布时间 2023-12-31 23:38:34作者: T7H
magic book.md

填空

class Dim:
    def __init__(self,x,y):
        self.x = x
        self.y = y
    def area(self):
        pass
class Circle(Dim):
    def __init__(self, r):
        Dim.__init__(self, 0, r)
    def area(self):
        return 3.14 * self.y * self.y
class Rectangle(Dim):
    def __init__(self, w, h):
        Dim.__init__(self, w, h)
    def area(self):
        return self.x * self.y
c1 = Circle(4.0)
r1 = Rectangle(3.0,5.0)
print('圆面积',c1.area())
print('矩形面积',r1.area())

def FindWanshu():
    ws = 0
    lst = ""
    for num in range(1,2001):
        s = num
        for i in range(1,num):
            if num%i == 0:
                s = s-i
        if s == 0:
            lst = lst + str(num) + ','
            ws = ws+1
    return lst,ws
f = open("wanshu.txt","w")
lstw,lws=FindWanshu()

f.write(lstw)

f.close()

print("1~2000之间的完数共有%d个" % lws)

print("wanshu:"+lstw)


import math
def FindSushu(lst):
    for num in range(1,1000):
        k = int(math.sqrt(num))
        for i in range(2,k+2):
            if num%i == 0:
                break
        if i == k+1:
            lst.append(num)
f = open("sushu.txt","w")
lst = []
FindSushu(lst)
txt = ""
for item in lst:
    txt += str(item)
    txt += ","
f.write(txt)
f.close()
print("1~1000之间的素数共有%d个" % len(lst))

class Per:
    def __init__(self,name,age):
        self.name=name
        self.age=age
    def say_hi(self):
        print("您好！我叫{0},{1}岁",format(self.name,self.age))
class Stud(Per):
    def __init__(self,name,age,stu_id):
        Per.__init__(self,name,age)
        self.stu_id=stu_id
    def say_hi(self):
        Per.say_hi(self)
        print('我是学生，我的学号为：',self.stu_id)
per1 = Per("张三",43)
per1.say_hi()
stu1 = Stud("李四",20,20212345678)
stu1.say_hi()

编程题

def max_n(a,b,*c):
    max_value = a
    if max_value < b:
        max_value = b
    for n in c:
        if max_value < n:
            max_value = n
    return max_value
#测试代码
print("最大值为：",max_n(6,2))
print("最大值为",max_n(16,5,7,4,20))

import math
class MyMath:
    def __init__(self,r):
        self.r = r
    global pi
    pi = 3.14
    def Perimeter(self):
        return (2 * pi * self.r)
    def Area(self):
        return (pi * self.r * self.r)
    def Surface(self):
        return (4 * pi * self.r * self.r)
    def Volume(self):
        return (4 * pi * pow(self.r, 3) / 3)
r = float(input("请输入半径："))
m = MyMath(r)
print(str.format("圆的周长 = {0:2.2f}",m.Perimeter()))
print(str.format("圆的面积 = {0:2.2f}",m.Area()))
print(str.format("球的表面积 = {0:2.2f}",m.Surface()))
print(str.format("球的体积 = {0:2.2f}",m.Volume()))    

def getMaxMin(s):
    maxi = s[0]
    mini = s[0]
    count = 0
    for i in s:
        if maxi < i:
            maxi = i
        if mini > i:
            mini = i
        count += 1
    return maxi, mini, count
#测试代码
list1 = [19,20,1,2,3]
x1,y1,z1 = getMaxMin(list1)
print("list=",list1)
print("最大值=",x1,"最小值",y1,"，元素个数",z1)
list2 = list2 = ["marry","lili","ben","alicei"]
x2,y2,z2 = getMaxMin(list2)
print("list=",list2)
print("最大值=",x2,"最小值",y2,"，元素个数",z2)

class Temperature:
    def __init__(self, degree, degree_type):
        self.degree = degree
        self.degree_type = degree_type
    def ToFahrenheit(self):
        if self.degree_type == 'C':
            self.degree_type = 'F'
            self.degree = (self.degree * 1.8) + 32
            return self.degree
        else:
            return self.degree
    def ToCelsius(self):
        if self.degree_type == 'F':
            self.degree_type = 'C'
            self.degree = (self.degree - 32) /1.8
            return self.degree
        else:
            return self.degree        
#测试代码
d1 = Temperature(float(input("请输入摄氏温度:")),'C')
print("华氏温度 = {0:2.2f},摄氏温度 = {1:2.2f}".format(d1.ToFahrenheit(),d1.ToCelsius()))
d2 = Temperature(float(input("请输入华氏温度:")),'F')
print("华氏温度 = {0:2.2f},摄氏温度 = {1:2.2f}".format(d2.ToFahrenheit(),d2.ToCelsius()))

必考

import numpy as np
import matplotlib.pyplot as plt
def f(t):
    return np.exp(-0.5*t) * np.cos(2*np.pi*t)
t1 = np.arange(0.0, 5.0, 0.1)
t2 = np.arange(0.0, 5.0, 0.02)
plt.figure('曲线')
plt.subplot(212)
plt.plot(t1, f(t1), 'ko', t2, f(t2), 'b')
plt.subplot(211)
plt.plot(t2,np.sin(2*np.pi*t2),'r',t1,np.cos(2*np.pi*t1+np.pi),'g-.o')
plt.show()