diff --git a/work1/single.c b/work1/single.c
index 4f98a42..f71328e 100644
--- a/work1/single.c
+++ b/work1/single.c
@@ -13,6 +13,12 @@ struct course_tag {
     float avg;
 };
 
+struct student_tag {
+    struct person_tag student_info;
+    struct course_tag course_info;
+    struct student_tag *next;
+}
+
 void display_students(void);
 void search_student(void);
 void find_maximum(void);