实验任务1
实验源码
class Account: '''一个模拟银行账户的简单类''' def __init__(self, name, account_number, initial_amount = 10): '''构造新账户''' self._name = name self._card_no = account_number self._balance = initial_amount def deposit(self, amount): '''存款''' self._balance += amount def withdraw(self, amount): '''取款''' if self._balance < amount: print('余额不足') return self._balance -= amount def info(self): '''打印账户信息''' 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): '''返回账户余额''' return self._balance def main(): '''创建Account类对象,测试类''' 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()
运行结果
实验任务2
test1
实验源码
''' shape.py是一个图形类模块 包括: 基类: 图形类Shape 派生类: 矩形类Rect, 圆形类Circle, 三角形类Triangle ''' class Shape: '''形状基类''' def info(self): '''打印图形信息''' pass def area(self): '''计算面积''' pass def perimeter(self): '''计算周长''' pass class Rect(Shape): ''' 矩形类, 继承自Shape 属性:矩形左上角点的坐标、宽、高 方法: 打印矩形信息,计算面积、周长 ''' def __init__(self, x = 0, y = 0, length = 2, width = 1): '''构造矩形对象,根据矩形左上角顶点坐标(x,y)和长、宽''' 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): ''' 圆形类,继承自Shape 属性:圆心坐标、半径 方法: 打印圆信息,计算面积、周长 ''' def __init__(self, x = 0, y = 0, radius = 1): '''构造圆形对象,圆心坐标(x,y), 半径r''' 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): ''' 三角形类,继承自Shape 属性:三边边长 方法:打印三角形信息,计算周长、面积 ''' 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()
test2
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()
运行结果
实验任务3
import math from math import * def func(x): m = 0 s = 2 fx = 1/((2*math.pi)**0.5*s)*math.exp(-0.5*((x-m)/s)**2) return fx for i in range(1,11,2): print(f'x={i},f={func(i):.8f}')
运行结果
标签:__,info,内置,面向对象编程,self,模块,._,print,def From: https://www.cnblogs.com/menghuanhu/p/17467838.html