diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..b6510ba
Binary files /dev/null and b/.DS_Store differ
diff --git a/main_副本2.c b/main_副本2.c
new file mode 100644
index 0000000..fde4e28
--- /dev/null
+++ b/main_副本2.c
@@ -0,0 +1,151 @@
+//
+//  main.c
+//  Lab_2
+//
+//  Created by theBao on 2023/11/4.
+//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct{
+    char *id;
+    char *class;
+    char *name;
+    double score1;
+    double score2;
+    double score3;
+    double score;
+}Student;
+
+typedef struct{
+    Student* student;
+    int nums;
+}ss;
+
+ss* init(int);
+void toMenu(ss*);
+void getCom(ss*);
+void Print(Student*);
+void allPrint(ss*);
+void input(ss*);
+void cancel(ss*);
+void Select(ss*);
+
+int main(int argc, const char * argv[]){
+    ss* stu = init(6);
+    toMenu(stu);
+    return 0;
+}
+
+ss* init(int Nums){
+    ss* stu = (ss*)malloc(sizeof(ss));
+    if(!stu) return NULL;
+    
+    stu->nums = Nums;
+    stu->student = (Student*)malloc(sizeof(Student)*Nums);
+    if(!stu->student) return NULL;
+    
+    for(int i = 0; i < Nums; ++i){
+        stu->student[i].id = (char*)malloc(sizeof(char)*5);
+        stu->student[i].class = (char*)malloc(sizeof(char)*2);
+        stu->student[i].name = (char*)malloc(sizeof(char)*10);
+
+    }
+    return stu;
+}
+
+void toMenu(ss*stu){
+    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\n");
+    getCom(stu);
+}
+
+void getCom(ss* stu){
+    int option;
+    scanf("%d",&option);
+    if(option == 1) input(stu);
+    else if(option == 2) cancel(stu);
+    else if(option == 3) Select(stu);
+    //else if(option == 4) sort(stu);
+    else if(option == 5) ;
+    else return;
+}
+
+void Print(Student*student){
+    printf("%s,%s,%s,%.1lf,%.1lf,%.1lf,%.1lf\n",student->id,student->class,student->name,student->score1,student->score2,student->score3,student->score);
+}
+
+void allPrint(ss*stu){
+    for(int i = 0; i < stu->nums; ++i){
+        Print(&stu->student[i]);
+    }
+}
+
+void input(ss*stu){
+    char *tmp = (char*)malloc(sizeof(char)*3);
+    do{
+        printf("Id  ");
+        // get
+        printf("\n");
+        
+        printf("class  ");
+        // get
+        printf("\n");
+        
+        printf("name  ");
+        // get
+        printf("\n");
+        
+        printf("score1  ");
+        // get
+        printf("\n");
+        
+        printf("score2  ");
+        // get
+        printf("\n");
+        
+        printf("score3  ");
+        // get
+        printf("\n");
+        
+        printf("continue?\n");
+        scanf("%s",tmp);
+    }while(strcmp(tmp,"yes"));
+    
+    toMenu(stu);
+}
+
+void cancel(ss*stu){
+    char* tmp = (char*)malloc(sizeof(char)*3);
+    do{
+        char*ID = (char*)malloc(sizeof(char)*5);
+        scanf("%s",ID);
+        for(int i = 0; i < stu->nums; ++i){
+            if(strcmp(stu->student[i].id,ID)){
+                for(int j = i; j < stu->nums-1; ++j){
+                    stu->student[j] = stu->student[j+1];
+                }
+            }
+        }
+        allPrint(stu);
+        printf("continue?\n");
+        scanf("%s",tmp);
+    }while(strcmp(tmp,"yes"));
+    toMenu(stu);
+}
+
+void Select(ss*stu){
+    char* tmp = (char*)malloc(sizeof(char)*3);
+    do{
+        ;
+    }while(0);
+}
+
+//void insert(ss*stu)