finished work

heads/add_module.h

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+void add_module();

heads/delete_module.h

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+void delete_module();

heads/for_function_module.h

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+#include "stu_info.h"
+int main();

heads/for_main.h

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+#include "stdio.h"
+#include "stdlib.h"
+#include "windows.h"
+#include "main_menu.h"
+#include "login_module.h"
+#include "registered_module.h"
+#include "secondary_menu.h"
+#include "add_module.h"
+#include "query_module.h"
+#include "delete_module.h"
+#include "statistic_module.h"
+#include "modify_module.h"

heads/login_module.h

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+void login_module();

heads/main_menu.h

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+void main_menu();

heads/modify_module.h

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+void modify_module();

heads/query_module.h

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+void query_module();

heads/registered_module.h

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+void registered_module();

heads/secondary_menu.h

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+void secondary_menu();

heads/statistic_module.h

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+void statistic_module();

heads/stu_info.h

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+struct stu{
+    char stu_num[20];
+    char name[20];
+    char gender[10];
+    int age;
+    float chinese,math,english;
+    struct stu *prev,*next;
+};

heads/users.h

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+struct user{
+    char account[20];
+    char password[20];
+    struct user *next;
+};