oop面向对象编程python

1.定义一个圆类（Circle）,求圆的面积和周长


import mathclass Circle():def __init__(self, R ,name):self.radius = Rself.name = namedef girth(self):return 2 * self.radius * math.pidef area(self):return self.radius ** 2 * math.pic1= Circle(10,"c1")
c2= Circle(20,"c2")
c3= Circle(30,"c3")
print(f"{c1.name} girth is {c1.girth():.2f} and area is {c1.area():.2f}")
print(f"{c2.name} girth is {c2.girth():.2f} and area is {c2.area():.2f}")
print(f"{c3.name} girth is {c3.girth():.2f} and area is {c3.area():.2f}")

2.定义一个三角形类（Strange）,属性是三边的长度，求三角形的面积和周长

# _*_ coding : utf-8 _*_
# @TIME : 2024/1/17 19:10
# @Author : gu
# @File : Triangle
# @Project : pytest
import mathclass Triangle():def __init__(self,side1,side2,side3):lis=[side1,side2,side3]lis.sort()if lis[0]+lis[1]>=lis[2]:self.side1 = side1self.side2 = side2self.side3 = side3else:self.side1 = 0self.side2 = 0self.side3 = 0def girth(self):return self.side1 + self.side2 + self.side3def area(self):p=self.girth()/2area = math.pow((p*(p-self.side1)*(p-self.side2)*(p-self.side3)),0.5)return areat2= Triangle(3,4,5)
t1= Triangle(1,3,5)
print(f"t1 girth is {t1.girth():.2f} and area is {t1.area():.2f}")
print(f"t2 girth is {t2.girth():.2f} and area is {t2.area():.2f}")

3.创建一个学员类，并设计三个字段用于表示学生的成绩（语文、数学、英语）：然后定义一个列表表示一个班的学生（10人），依次输入每个学生的信息和成绩，输入的同时将学员的每科成绩划分等级（100-90：A 89-80：B 79-70：C 69-60：D 60以下：E）最后输出所有学员的信息

# _*_ coding : utf-8 _*_
# @TIME : 2024/1/17 19:30
# @Author : gu
# @File : Student
# @Project : pytest
class student():def __init__(self, name, math, eng, lan):self.name = nameself.math = mathself.eng = engself.lan = lan@staticmethoddef to_level(score):if score >= 90:return 'A'elif score >= 80:return 'B'elif score >= 70:return 'C'elif score >= 60:return 'D'elif score >= 0:return 'E'else:return '输入错误'def math_level(self):return self.to_level(self.math)def eng_level(self):return self.to_level(self.eng)def lan_level(self):return self.to_level(self.lan)def __str__(self):return f"姓名{self.name} 数学成绩{self.math} 语文成绩{self.lan} 英语成绩{self.eng}语文评级{self.lan_level()} 数学评级{self.math_level()} 英语评级{self.eng_level()} "lis=['student1', 'student2', 'student3', 'student4', 'student5','student6', 'student7', 'student8', 'student9', 'student10']
s=['']*len(lis)
for i in range(0,len(lis)):scoree=input(f"输入{lis[i]}的成绩 分别是数学 英语 语文").split(',')score=list(map(int,scoree))s[i]=student(lis[i],score[0],score[1],score[2])print(f"{s[i].name} 的英语评级是{s[i].eng_level()} 语文评级{s[i].lan_level()} 数学评级{s[i].math_level()}")
for i in s:print(i)

4.编一个关于求某门功课总分和平均分的程序

- 每个学生的信息包括姓名和某门功课的成绩

- 假设5个学生

- 类和对象的处理要合理


class Student:def __init__(self, name, score):self.name = nameself.score = scoredef get_total_score(self):return sum(self.score)def get_average_score(self):return sum(self.score) / len(self.score)student1 = Student("张三", [90, 85, 80])
student2 = Student("李四", [95, 90, 75])
student3 = Student("王五", [80, 70, 60])
student4 = Student("赵六", [85, 75, 65])
student5 = Student("孙七", [70, 60, 50])students = [student1, student2, student3, student4, student5]
def calculate_and_print(subject_index):total_score = 0 # 初始化总分为0for student in students: # 遍历所有的学生对象total_score += student.score[subject_index]average_score = total_score / len(students)print(f"该门功课的总分是{total_score}，平均分是{average_score}")calculate_and_print(0)
calculate_and_print(1)
calculate_and_print(2)

5.设计一个游戏角色类

字段：角色名、血量、魔法、状态

方法：释放技能被伤害

要求：设计合理

# _*_ coding : utf-8 _*_
# @TIME : 2024/1/17 21:39
# @Author : gu
# @File : hero
# @Project : pytestclass Hero:name: strhealth: intmagic: intstatus: strdef __init__(self, name, health, magic, status):self.name = nameself.health = healthself.magic = magicself.status = statusdef use_skill(self):if self.magic > 0:print(f"{self.name} 使用了技能")self.status = '使用技能'self.magic -= 1else:print("能量不足")self.status= "能量耗尽"def hearted(self):if self.health > 0:print(f"{self.name}收到攻击")self.status = '收到伤害'self.health -= 1else:self.status = '死'print("阵亡")hero = Hero('蛮王',100,100,"存活")
print(hero.status)
hero.use_skill()
print(hero.status)
hero.hearted()
print(hero.status)
for i in range(100):hero.use_skill()
print(hero.status)
for i in range(100):hero.hearted()
print(hero.status)