1. 题目：写一个函数，计算给定列表中所有偶数的和。
defsum_even_numbers(lst):return sum(num for num in lst if num % 2 == 0)numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]result = sum_even_numbers(numbers)print(result)
2. 题目：实现一个简单的计算器程序，要求支持加、减、乘、除四则运算。
def calculator(operator, num1, num2):ifoperator == '+':return num1 + num2 elif operator == '-':return num1 - num2 elif operator == '*':return num1 * num2 elif operator == '/':return num1 / num2else:return"Invalid operator"result = calculator('+', 10, 5)print(result)
3. 题目：编写一个函数，接受一个字符串，并返回该字符串的反转字符串。
defreverse_string(s):return s[::-1]text = "Hello, World!"reversed_text = reverse_string(text)print(reversed_text)
4. 题目：写一个程序，打印出斐波那契数列的前20项。
deffibonacci(n):if n <= 1:return nelse:return fibonacci(n-1) + fibonacci(n-2)for i in range(20): print(fibonacci(i))
5. 题目：实现一个简单的购物车程序，用户可以添加商品、查看购物车、计算总价等功 能。
classShoppingCart:def__init__(self):self.items = {}defadd_item(self, item, price):if item inself.items:self.items[item] += priceelse:self.items[item] = pricedefcalculate_total(self):return sum(self.items.values())defdisplay_cart(self):for item, price inself.items.items(): print(f"{item}: ${price}")cart = ShoppingCart()cart.add_item("Apple", 2.5)cart.add_item("Banana", 1.5)cart.add_item("Orange", 3.0)cart.display_cart()total_price = cart.calculate_total()print(f"Total Price: ${total_price}")
6. 题目：编写一个函数，接受一个整数 n，计算并返回从 1 到 n 的所有整数的平方和。
defsum_of_squares(n):return sum([i**2for i in range(1, n+1)])n = 5result = sum_of_squares(n)print(result)
7. 题目：实现一个简单的猜数字游戏，程序随机生成一个1到100之间的整数，用户通过输入来猜这个数字，直到猜对为止。
import randomtarget_number = random.randint(1, 100)whileTrue: guess = int(input("Guess the number (1-100): "))if guess == target_number: print("Congratulations! You guessed the correct number.")breakelif guess < target_number: print("Try a higher number.")else: print("Try a lower number.")
8. 题目：编写一个函数，接受一个字符串，返回该字符串中每个单词首字母大写的新字符串。
defcapitalize_words(s):return' '.join(word.capitalize() for word in s.split())text = "hello world, how are you?"result = capitalize_words(text)# print(result)
9. 题目：实现一个简单的学生信息管理系统，包括添加学生、查看学生信息等功能。
classStudent:def__init__(self, name, age, grade):self.name = nameself.age = ageself.grade = grade classStudentDatabase:def__init__(self):self.students = []defadd_student(self, student):self.students.append(student)defdisplay_students(self):for student inself.students: print(f"Name: {student.name}, Age: {student.age}, Grade: {student.grade}")db = StudentDatabase()student1 = Student("Alice", 18, "A")student2 = Student("Bob", 19, "B")db.add_student(student1)db.add_student(student2)db.display_students()
10. 题目：编写一个程序，接受用户输入的两个整数，然后输出它们的最大公约数。
defgcd(a, b):while b: a, b = b, a % breturn anum1 = int(input("Enter the first number: "))num2 = int(input("Enter the second number: "))result = gcd(num1, num2)print(f"The greatest common divisor of {num1} and {num2} is: {result}")
