def welcome(): print("欢迎使用学员管理系统") print("1. 添加学员") print("2. 查看所有学员") print("3. 学员人数统计") print("4. 保存学员到文件") print("5. 从文件加载学员") print("0. 退出系统")

students = [] # 用列表保存学员信息

def add_student(): name = input("请输入学员姓名: ") age = int(input("请输入学员年龄: ")) score = float(input("请输入学员成绩: ")) student = {"name": name, "age": age, "score": score} students.append(student) print(f"学员{name}添加成功！")

def show_students(): if not students: print("当前没有学员信息。") else: for idx, stu in enumerate(students): print(f"{idx+1}. 姓名:{stu['name']} 年龄:{stu['age']} 成绩:{stu['score']}")

def count_students(): print(f"当前学员总人数: {len(students)}")

def save_students(): try: with open("students.txt", "w", encoding="utf-8") as f: for stu in students: line = f"{stu['name']},{stu['age']},{stu['score']}\n" f.write(line) print("保存成功！") except Exception as e: print("保存失败:", e)

def load_students(): try: with open("students.txt", "r", encoding="utf-8") as f: students.clear() for line in f: name, age, score = line.strip().split(",") student = {"name": name, "age": int(age), "score": float(score)} students.append(student) print("加载成功！") except Exception as e: print("加载失败:", e)

def main(): while True: welcome() choice = input("请选择操作（输入序号）: ") if choice == "1": add_student() elif choice == "2": show_students() elif choice == "3": count_students() elif choice == "4": save_students() elif choice == "5": load_students() elif choice == "0": print("退出系统。") break else: print("输入有误，请重新选择。")

if name == "main": main()