历经几天终于完成了自己写的第一个程序，在这个过程中可谓艰辛啊
没写注释，所以大家自己领悟吧，有需要的朋友别抄袭哦！
class SqList: def __init__(self): self.init_capacity = 1 self.capacity = self.init_capacity self.data = [None] * self.capacity self.size = 0 def student(self, number, name, course, grade): self.number = number self.name = name self.course = course self.grade = grade return f'学号为{self.number}，名字为{self.name}，课程为{self.course}，成绩为{self.grade}' def resize(self, new_capacity): assert new_capacity >= 0 old_data = self.data self.data = [None] * new_capacity self.capacity = new_capacity for i in range(self.size): self.data[i] = old_data[i] def add_to(self, data): if self.size == self.capacity: self.resize(2 * self.size) self.data[self.size] = data self.size += 1 def add_stu(self): if self.size == self.capacity: self.resize(2 * self.size) number_stu, name_stu, course_stu, grade_stu = input("输入学号，姓名，科目，成绩：(以空格为间)").split(" ") self.add_to(number_stu) self.add_to(name_stu) self.add_to(course_stu) self.add_to(grade_stu) print("添加成功") def all_stu(self): if self.data == [None]: print("暂时无学生的信息") else: stu = 0 for i in range(self.size // 4): print(self.student(self.data[stu], self.data[stu + 1], self.data[stu + 2], self.data[stu + 3])) stu += 4 # print(self.data) # print(self.size) def pop_number(self, op): num = 0 while num < self.size and self.data[num] != op: num += 1 for j in range(num + 4, self.size): self.data[j - 4] = self.data[j] self.size -= 4 if self.capacity > self.init_capacity and self.size <= self.capacity / 4: self.resize(self.capacity // 2) def pop_course(self,pop): num = 0 while num < self.size and self.data[num] != pop: num += 1 for j in range(num + 4, self.size): self.data[j - 4] = self.data[j] self.size -= 4 def delete_stu(self): select=int(input("请选择删除方式(1.学号删除，2.课程删除):")) if select==1: id_stu = str(input("输入需要删除的学生的学号：")) if id_stu in self.data: self.pop_number(id_stu) else: print("无此学生信息") elif select==2: course_in=str(input("输入要删除的学生的对应课程：")) if course_in in self.data: self.pop_course(course_in) else: print("无此课程") else: print("请输入正确指令") def sort_number(self): for i in range(self.size // 4): exchange = False for j in range(self.size - 4,0, -4): if int(self.data[j]) > int(self.data[j - 4]): number, name, course, grade = self.data[j], self.data[j - 1], self.data[j - 2], self.data[j - 3] self.data[j], self.data[j - 1], self.data[j - 2], self.data[j - 3] = self.data[j - 4], self.data[j - 5], self.data[j - 6], self.data[j - 7] self.data[j - 4], self.data[j - 5], self.data[j - 6], self.data[j - 7] = number, name, course, grade exchange = True if exchange==False:return def sort_grade(self): for i in range(self.size // 4): exchange = False for j in range(self.size - 4,4,-4): if int(self.data[j]) < int(self.data[j - 4]): number, name, course, grade = self.data[j], self.data[j - 1], self.data[j - 2], self.data[j - 3] self.data[j], self.data[j -1], self.data[j - 2], self.data[j - 3] = self.data[j - 4], self.data[ j - 5], self.data[j - 6], self.data[j - 7] self.data[j - 4], self.data[j - 5], self.data[j - 6], self.data[j - 7] = number, name, course, grade if exchange == False: return print(self.data) def menu_stu(self): try: while True: print('1.显示学生记录\n2.添加一个学生信息\n3.输入学号或课程删除学生记录\n4.按学号递减排序输出学生记录\n5.递减查看学生成绩\n6.退出系统\n') select = int(input("输入对应功能数字：")) if select == 1: self.all_stu() if select == 2: self.add_stu() if select == 3: self.delete_stu() if select == 4: self.sort_number() if select == 5: self.sort_grade() if select == 6: print("欢迎下一次使用") break except ValueError: print("输入有效内容，please！") use = SqList() use.menu_stu()
