一道不错的综合题

古城微笑少年丶 2022-05-29 01:55 146阅读 0赞

学生类：姓名、年龄、学号、成绩

班级类：班级名称、学生列表

显示所有学生

根据学号查找学生

添加一个学生

删除一个学生（学生对象、学号）

根据学号升序排序

根据成绩降序排序、

学生类

class Student():
        def __init__(self,name,age,sid,score):
            self.name=name;
            self.age=age;
            self.sid=sid;
            self.score=score;
        def __str__(self):
            return '[student name=%s age=%d sid=%d score=%d]'%(self.name,self.age,self.sid,self.score);
    
        __repr__=__str__;

班级类

class ClassDemo():
        def __init__(self,classname):
            self.classname=classname;
            self._students=[];
            self._student_dict={};
    
    
        # 添加学生
        def add_student(self,stu):
            self._students.append(stu);
            self._student_dict[stu.sid]=stu;
    
        # 显示
        def  show_all_students(self):
            for stu in self._students:
                print(stu);
    
        # 查找
        def search_student(self,sid):
            if(sid in self._student_dict):
                return self._student_dict[sid];
            return None;
    
        # 删除
        def del_student(self,sid):
            stu=self.search_student(sid);
            if(stu!=None):
                self._student_dict.pop(sid);
                self._students.remove(stu);
                print('删除成功');
            else:
                print('没有该学生');
    
        # 根据学号进行升序排序
        def sid_sort(self):
            for i in range(len(self._students)-1,0,-1):
                for j in range(0,i):
                    if(self._students[j].sid>self._students[j+1].sid):
                        temp=self._students[j];
                        self._students[j]=self._students[j+1];
                        self._students[j+1]=temp;
    
        # 根据成绩降序排序
        def score_sort(self):
                for i in range(len(self._students) - 1, 0, -1):
                    for j in range(0, i):
                        # 列表中的元素是学生对象
                        # 但是比较的是学生的学号信息
                        if self._students[j].score < self._students[j + 1].score:
                            # 交换两个学生对象的位置
                            temp = self._students[j]
                            self._students[j] = self._students[j + 1]
                            self._students[j + 1] = temp

测试类

from class1.zuoye.day002.disanti.student import Student;
    from class1.zuoye.day002.disanti.classdemo import ClassDemo;
    def main():
        g = ClassDemo("python1802")
    
        a=Student('张三',14,1001,55);
        b=Student('李四',16,1005,32);
        c=Student('王五',20,1003,16);
    
        # 添加学生 ，并显示出来
        g.add_student(a);
        g.add_student(b);
        g.add_student(c);
        g.show_all_students()
        print('============================================');
    
        # 查找
        print(g.search_student(1005));
        print('============================================')
    
        # 删除
        g.del_student(1003);
        g.show_all_students();
        print('============================================')
    
        # 学号排序
        g.sid_sort();
        g.show_all_students();
        print('============================================')
    
        # 成绩排序
        g.score_sort();
        g.show_all_students();
    
    
    
    
    
    
    if __name__ == '__main__':
        main();