add study.c

study/study.c

@@ -7,4 +7,9 @@ void study_set_class(uint8_t class)
 uint8_t study_get_class(void)
 {
 	return g_class;
+}
+
+uint8_t study_sign_in(char *name, char *time)
+{
+	
 }

study/study.h

@@ -1,4 +1,5 @@
 #include "stdio.h"
 
 void study_set_class(uint8_t class);
-uint8_t study_get_class(void);
+uint8_t study_get_class(void);
+uint8_t study_sign_in(char *name, char *time);