diff --git a/作业2.8.c b/作业2.8.c
deleted file mode 100644
index 61e156e..0000000
--- a/作业2.8.c
+++ /dev/null
@@ -1,154 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-// ¶¨ÒåѧÉú½á¹¹Ìå
-struct Student {
-    char id[20];
-    char clas[20];
-    char name[20];
-    double score1;
-    double score2;
-    double score3;
-    double score;
-};
-
-// È«¾ÖѧÉúÊý×é
-struct Student* students[100];
-int studentCount = 0;
-
-// ²Ëµ¥º¯Êý
-void printMenu() {
-    printf("1. Input\n");
-    printf("2. Delete\n");
-    printf("3. Select\n");
-    printf("4. Order\n");
-    printf("5. Output\n");
-    printf("6. Quit\n");
-    printf("Please input your option: ");
-}
-
-// ѧÉúÐÅϢ¼È뺯Êý
-void inputStudent() {
-    if (studentCount < 100) {
-        struct Student* student = (struct Student*)malloc(sizeof(struct Student));
-        printf("Id: ");
-        scanf("%s", student->id);
-        printf("Class: ");
-        scanf("%s", student->clas);
-        printf("Name: ");
-        scanf("%s", student->name);
-        printf("Score1: ");
-        scanf("%lf", &student->score1);
-        printf("Score2: ");
-        scanf("%lf", &student->score2);
-        printf("Score3: ");
-        scanf("%lf", &student->score3);
-        student->score = student->score1 + student->score2 + student->score3;
-        students[studentCount++] = student;
-    } else {
-        printf("Student database is full!\n");
-    }
-}
-
-// ѧÉúÐÅϢɾ³ýº¯Êý
-void deleteStudent() {
-    char deleteId[20];
-    printf("Enter student ID or name to delete: ");
-    scanf("%s", deleteId);
-
-    int deleted = 0;
-    for (int i = 0; i < studentCount; i++) {
-        if (strcmp(students[i]->id, deleteId) == 0 || strcmp(students[i]->name, deleteId) == 0) {
-            free(students[i]);
-            for (int j = i; j < studentCount - 1; j++) {
-                students[j] = students[j + 1];
-            }
-            studentCount--;
-            deleted = 1;
-            i--;
-        }
-    }
-
-    if (deleted == 0) {
-        printf("Student not found.\n");
-    }
-}
-
-// ѧÉúÐÅÏ¢²éѯº¯Êý
-void selectStudent() {
-    char query[20];
-    printf("Enter student ID or class to select: ");
-    scanf("%s", query);
-
-    int found = 0;
-    for (int i = 0; i < studentCount; i++) {
-        if (strcmp(students[i]->id, query) == 0 || strcmp(students[i]->clas, query) == 0) {
-            printf("%s, %s, %s, %.1lf, %.1lf, %.1lf, %.1lf\n", students[i]->id, students[i]->clas, students[i]->name, students[i]->score1, students[i]->score2, students[i]->score3, students[i]->score);
-            found = 1;
-        }
-    }
-
-    if (found == 0) {
-        printf("There is no eligible student.\n");
-    }
-}
-
-// ѧÉúÐÅÏ¢ÅÅÐòº¯Êý
-void orderStudents() {
-    for (int i = 0; i < studentCount; i++) {
-        for (int j = i + 1; j < studentCount; j++) {
-            if (strcmp(students[i]->clas, students[j]->clas) > 0 || (strcmp(students[i]->clas, students[j]->clas) == 0 && students[i]->score < students[j]->score)) {
-                struct Student* temp = students[i];
-                students[i] = students[j];
-                students[j] = temp;
-            }
-        }
-    }
-}
-
-// ѧÉúÐÅÏ¢Êä³öº¯Êý
-void outputStudents() {
-    for (int i = 0; i < studentCount; i++) {
-        printf("%s, %s, %s, %.1lf, %.1lf, %.1lf, %.1lf\n", students[i]->id, students[i]->clas, students[i]->name, students[i]->score1, students[i]->score2, students[i]->score3, students[i]->score);
-    }
-}
-
-int main() {
-    int option;
-    do {
-        printMenu();
-        scanf("%d", &option);
-        switch (option) {
-            case 1:
-                inputStudent();
-                break;
-            case 2:
-                deleteStudent();
-                break;
-            case 3:
-                selectStudent();
-                break;
-            case 4:
-                orderStudents();
-                outputStudents();
-                break;
-            case 5:
-                outputStudents();
-                break;
-            case 6:
-                // Í˳ö³ÌÐò
-                break;
-            default:
-                printf("Invalid option. Please try again.\n");
-        }
-    } while (option != 6);
-
-    // ÊÍ·ÅÄÚ´æ
-    for (int i = 0; i < studentCount; i++) {
-        free(students[i]);
-    }
-
-    return 0;
-}
-