Python实验九 面向对象程序设计方法

1.写出程序的运行结果

class P1:
    def foo(self):
        print(callable P1-foo)
class P2:
    def foo(self):
        print(callable P2-foo)
    def bar(self):
        print(callable P2-bar)
class C1(P1,P2):
    pass
class C2(P1,P2):
    def bar(self):
        print(callable C2-bar())
class GC(C1,C2):
    pass
gc=GC()
gc.foo()
gc.bar()

3.写出程序的运行结果

import math
class Circle:
    def __init__(self, radius):
        self.radius=radius
    def getRadius(self):
        return self.radius
    def getArea(self):
        return math.pi*self.radius*self.radius
def main():
    c1=Circle(10)
    print(c1.getRadius())
    print({:7.2f}.format(c1.getArea()))
if __name__==__main__:
    main()

4.定义一个 Circle 类，根据圆的半径求周长和面积。再由 Circle 类创建两个 圆对象，其半径分别为 5 和 10，要求输出各自的周长和面积。请补充程序

import math
class Circle:
    def __init__(self,radius=5):          #完成构造函数
        self.radius=radius
    def getPerimeter(self):
        return 2*math.pi*self.radius
    def getArea(self):
        return math.pi*self.radius*self.radius
c1=Circle()
c2=Circle(10)       #向构造函数传递新的参数
print(c1.radius, c1.getPerimeter(), c1.getArea())
print(c2.radius, c2.getPerimeter(), c2.getArea())

4.利用面向对象方法求 n！，并输出 10！的值

class Factorial:
    def fac (self,num):
        factorial = 1
        for i in range(1,num+1):
            factorial *= i
        return factorial
        
if __name__ == __main__:
    factorial = Factorial()
    n=int(input(请输入n：))
    print(n,!=,factorial.fac(n))

5.定义 change 类，用以实现角度和弧度之间的转换

class Change:
    import math
    def rad_to_ang(self,radian):
        return radian*180/math.pi
    def ang_to_rad(self,angle):
        return angle*math.pi/180
    
if __name__ == __main__:
    import math
    change=Change()
    print({0}弧度 = {1}°.format(math.pi,change.rad_to_ang(math.pi)))
    print({0}° = {1}弧度.format(90,change.ang_to_rad(90)))

6.设计点类，并为这个点类设置一个方法来计算两点之间的距离

class Point:
    def cal_distance (self,p1,p2):
        import math
        return math.sqrt(math.pow((p2[0] - p1[0]), 2) + math.pow((p2[1] - p1[1]), 2))

if __name__ == __main__:
    point=Point()
    p1=[0,0]
    p2=[1,1]
    print(点{0}与点{1}之间的距离是{2}.format(p1,p2,point.cal_distance(p1,p2)))

7.设计长方形类，并用其成员函数计算两个给定的长方形的周长和面积

class Rectangle:
    def get_perimeter(self,length,width):
        return 2*(length+width)
    def get_area(self,length,width):
        return length*width

if __name__ == __main__:
    rectangle=Rectangle()
    print(长{0}宽{1}的长方形：周长={2},面积={3}.format(3,4,rectangle.get_perimeter(3,4),rectangle.get_area(3,4)))
    print(长{0}宽{1}的长方形：周长={2},面积={3}.format(11,11,rectangle.get_perimeter(3,4),rectangle.get_area(3,4)))

8.已有若干个学生数据，这些数据包括学号，姓名，程序设计基础成绩，高等 数学成绩和英语成绩，要求定义学生类，并用其成员函数求各门课程的平均分

class Student:
    def __init__(self,id,name,program,math,english):
        self.id=id
        self.name=name
        self.program=program
        self.math=math
        self.english=english
    @staticmethod
    def get_avg(*students):
        program_total=0
        math_total=0
        english_total=0
        for i in range(len(students)):
            program_total += students[i].program
            math_total += students[i].math
            english_total += students[i].english
        return [program_total/len(students),math_total/len(students),english_total/len(students)]

if __name__ == __main__:
    student1=Student(001,张三,55,55,55)
    student2=Student(002,李四,66,66,66)
    student3=Student(003,王五,77,77,77)
    students=[student1,student2,student3]
    print(平均分
程序设计基础:{0}，高等数学:{1}，英语:{2}.format(Student.get_avg(*students)[0],Student.get_avg(*students)[1],Student.get_avg(*students)[2]))