diff --git a/.main2.c.swp b/.main2.c.swp
new file mode 100644
index 0000000..1cf5fae
Binary files /dev/null and b/.main2.c.swp differ
diff --git a/delete.c b/delete.c
new file mode 100644
index 0000000..60f643d
--- /dev/null
+++ b/delete.c
@@ -0,0 +1,19 @@
+#include "mysyslib.h"
+
+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"));
+}
diff --git a/init.c b/init.c
new file mode 100644
index 0000000..80e20eb
--- /dev/null
+++ b/init.c
@@ -0,0 +1,18 @@
+#include "mysyslib.h"
+
+ ss* init(int Nums){
+     ss* stu = (ss*)malloc(sizeof(ss));
+     if(!stu) return NULL;
+
+     stu->nums = 0;
+     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;
+ }
diff --git a/input.c b/input.c
new file mode 100644
index 0000000..91cb3e3
--- /dev/null
+++ b/input.c
@@ -0,0 +1,33 @@
+#include "mysyslib.h"
+
+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"));
+}
diff --git a/main.c b/main.c
index 288d6f5..97c7215 100644
--- a/main.c
+++ b/main.c
@@ -2,11 +2,15 @@
 
 int main(){
   char ipt;
+  ss* stu = init(6);
   while(1){
     ipt = mainMenu();
     if(ipt=='i'){
+      input(stu);
     }else if(ipt=='o'){
+      cancel(stu);
     }else if(ipt=='m'){
+
     }else if(ipt=='q'){
       break;
     }else{
diff --git a/mysyslib.h b/mysyslib.h
index 7a37c57..2ab5774 100644
--- a/mysyslib.h
+++ b/mysyslib.h
@@ -1,3 +1,27 @@
 #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);
 char mainMenu();
+void getCom(ss*);
+void Print(Student*);
+void allPrint(ss*);
+void input(ss*);
+void cancel(ss*);
+void Select(ss*);
diff --git a/output.c b/output.c
new file mode 100644
index 0000000..520970f
--- /dev/null
+++ b/output.c
@@ -0,0 +1,11 @@
+#include "mysyslib.h"
+
+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]);
+    }
+}   
diff --git a/main_副本2.c b/unusemain.c
similarity index 99%
rename from main_副本2.c
rename to unusemain.c
index fde4e28..63ab658 100644
--- a/main_副本2.c
+++ b/unusemain.c
@@ -43,7 +43,7 @@ ss* init(int Nums){
     ss* stu = (ss*)malloc(sizeof(ss));
     if(!stu) return NULL;
     
-    stu->nums = Nums;
+    stu->nums = 0;
     stu->student = (Student*)malloc(sizeof(Student)*Nums);
     if(!stu->student) return NULL;