使用Python的`random`库可以编写一个随机出四则运算题目的小程序。下面是几种不同实现方式的代码示例： ### 示例一：生成指定数量的四则运算题目并与用户交互判断对错 ```python import random def generate_random_number(): return random.randint(1, 100) def generate_random_operator(): return random.choice(['+', '-', '*', '/']) def generate_math_question(): num1 = generate_random_number() num2 = generate_random_number() operator = generate_random_operator() if operator == '-': num1, num2 = max(num1, num2), min(num1, num2) elif operator == '/': num1 = num2 * random.randint(1, 10) question = f"{num1} {operator} {num2}" answer = eval(question) return question, answer def generate_math_questions(num_questions): questions = [] for _ in range(num_questions): question, answer = generate_math_question() questions.append((question, answer)) return questions num_questions = 5 questions = generate_math_questions(num_questions) correct_count = 0 for question, answer in questions: user_answer = float(input(f"What is {question}? ")) if user_answer == answer: print("Correct!") correct_count += 1 else: print(f"Wrong! The correct answer is {answer}.") print(f"You got {correct_count} out of {num_questions} correct.") ``` ### 示例二：随机产生指定数量和最大数字范围的正整数四则运算题目并统计正确率 ```python import random random.seed(0) def calculator(n, maximum): correct = 0 for i in range(n): b = random.randint(0, maximum) a = random.randint(b, maximum) operators = ['+', '-', '*', '/'] sign = random.choice(operators) print(f'{a}{sign}{b}=') result = float(input()) if result == eval(f"{a}{sign}{b}"): correct = correct + 1 print(f'答对{correct}题，正确率为{correct / n * 100}%') if __name__ == '__main__': num = int(input('请输入出题数量：')) m = int(input('请输入参与计算的最大数字：')) calculator(num, m) ```