定义学生班级信息 class_info = [] def print_menu(): print("---------------------------") print(" 学生管理系统 V1.0") print(" 1:添加学生") print(" 2:删除学生") print(" 3:修改学生") print(" 4:查询学生") print(" 5:显示所有学生") print(" 6:退出系统") print("---------------------------") def add_student(): # 声明使用全局变量 class_info global class_info # 输入学生信息 name = input("请输入添加学生的姓名: >>>") age = int(input("请输入添加学生的年龄: >>>")) score = int(input("请输入添加学生的成绩: >>>")) # 判断输入信息 for student in class_info: if student["name"] == name: print("您输入的学生已经存在！") return -1 if 0 >= age: print("您输入的年龄有误！") return -2 if 0 > score or score > 101: print("您输入的成绩有误!") return -3 # 描述学生信息 student = { "name": name, "age": age, "score": score } # 将学生信息添加到班级信息中 class_info.append(student) print("恭喜您,添加成功") return 0 def del_student(): # 声明使用全局变量class_info global class_info # 输入需要删除的学生姓名 name = input("请输入需要删除的学生姓名: >>>") # 寻找学生 for student in class_info: if student["name"] == name: # 找到需要删除的学生 class_info.remove(student) print("删除成功！") return 0 print("您输入的学生不存在") return -1 def main(): while True: # 打印菜单 print_menu() # 输入自己的选择 choose = int(input("请输入您的选择: >>>")) if choose == 1: add_student() print(class_info) elif choose == 2: del_student() print(class_info) pass main()帮我继续完成学生管理系统，完成其功能

好的，以下是完整的学生管理系统代码，已经实现了添加、删除、修改、查询和显示所有学生的功能：

class_info = []

def print_menu():
    print("---------------------------")
    print(" 学生管理系统 V1.0")
    print(" 1:添加学生")
    print(" 2:删除学生")
    print(" 3:修改学生")
    print(" 4:查询学生")
    print(" 5:显示所有学生")
    print(" 6:退出系统")
    print("---------------------------")

def add_student():
    global class_info
    
    name = input("请输入添加学生的姓名: >>>")
    age = int(input("请输入添加学生的年龄: >>>"))
    score = int(input("请输入添加学生的成绩: >>>"))

    for student in class_info:
        if student["name"] == name:
            print("您输入的学生已经存在！")
            return -1
    if 0 >= age:
        print("您输入的年龄有误！")
        return -2
    if 0 > score or score > 101:
        print("您输入的成绩有误!")
        return -3

    student = {
        "name": name,
        "age": age,
        "score": score
    }
    class_info.append(student)
    print("恭喜您,添加成功")
    return 0

def del_student():
    global class_info
    
    name = input("请输入需要删除的学生姓名: >>>")

    for student in class_info:
        if student["name"] == name:
            class_info.remove(student)
            print("删除成功！")
            return 0
    print("您输入的学生不存在")
    return -1

def modify_student():
    global class_info
    
    name = input("请输入需要修改的学生姓名: >>>")

    for student in class_info:
        if student["name"] == name:
            age = int(input("请输入修改后的年龄: >>>"))
            score = int(input("请输入修改后的成绩: >>>"))
            
            if 0 >= age:
                print("您输入的年龄有误！")
                return -2
            if 0 > score or score > 101:
                print("您输入的成绩有误!")
                return -3
            
            student["age"] = age
            student["score"] = score
            print("修改成功！")
            return 0
    print("您输入的学生不存在")
    return -1

def query_student():
    global class_info
    
    name = input("请输入需要查询的学生姓名: >>>")

    for student in class_info:
        if student["name"] == name:
            print("姓名:", student["name"], "年龄:", student["age"], "成绩:", student["score"])
            return 0
    print("您输入的学生不存在")
    return -1

def show_all_students():
    global class_info
    
    for student in class_info:
        print("姓名:", student["name"], "年龄:", student["age"], "成绩:", student["score"])

def main():
    while True:
        print_menu()
        choose = int(input("请输入您的选择: >>>"))
        if choose == 1:
            add_student()
        elif choose == 2:
            del_student()
        elif choose == 3:
            modify_student()
        elif choose == 4:
            query_student()
        elif choose == 5:
            show_all_students()
        elif choose == 6:
            print("谢谢使用，再见！")
            break

main()

你现在可以在命令行中运行这个程序，体验完整的学生管理系统了。希望能帮到你！