use static library instead of object

.gitignore

@@ -0,0 +1,16 @@
+*
+!/**/
+!*.*
+!Makefile
+
+*~
+*.swp
+*.swo
+*.o
+*.a
+*.so
+*.class
+*.log
+*.core
+*.gcno
+*.tar*

Makefile

@@ -1,21 +1,24 @@
 CC = gcc
 CFLAGS := -std=c99 -Wall -Wextra -Werror -pedantic -Wvla
-OBJ_RUN := src/student.c src/main.o src/pin_handler.o
+OBJ_RUN := src/student.c
 
 all: run
 
+%.o: %.c
+	@$(CC) $(LFLAGS) $(CFLAGS) -c -o $@ $<
+
+prepare: CFLAGS += -shared
 prepare: src/main.o src/pin_handler.o
+	ar crs src/pin_handler.a $^
+	tar czf student.tar.gz src/pin_handler.a src/student.c src/default_student.c Makefile student.ino src/parser.c
 
 parser: src/parser.o student.ino
 	@$(CC) $(CFLAGS) -o $@ src/parser.o 
 	@./parser ./student.ino
 
 run: parser $(OBJ_RUN) student.ino
-	@$(CC) -o main $(OBJ_RUN)
+	@$(CC) -o main $(OBJ_RUN) src/pin_handler.a
 	@./main
 
-%.o: %.c
-	@$(CC) $(LFLAGS) $(CFLAGS) -c -o $@ $<
-
 clean:
 	$(RM) src/*.o main parser

README.md

@@ -9,8 +9,10 @@
 *Note that the passcode must end with a '#'*
 
 2. Run the command ``make prepare``
-3. Give this repository to your student but make sure not to give the ``src/pin_handler.h`` file or to change the passcode you compiled with
-4. To test the ``student.ino`` just run ``make run``
+
+*This will create a ``student.tar.gz`` that will contain the static library used to run the student code and the parser code*
+
+3. To test the ``student.ino`` just run ``make run``
 
 ## Warning
 
@@ -18,4 +20,6 @@ This is a very very basic parser, and so it will not work with a certain number
 * if you don't use the variable for the pin numbers
 * if you write 'digitalWrite()' on several lines
 * if you move the loop() opening bracket on the next line
-* ...
+* if the main loop() call others functions
+* if you use arduino or c++ specific functions
+* ...

src/default_student.c

@@ -1,4 +1,3 @@
-#include "pin_handler.h"
 #include <stddef.h>
 
 #define L1 1
@@ -10,7 +9,7 @@
 #define C3 7
 #define C4 8
 
-
+void set_pin(int id, short state, size_t *row, size_t *col, char *sequence, size_t *pointer);
 
 void student(char *sequence, size_t *pointer)
 {

src/student.c

@@ -1,4 +1,3 @@
-#include "pin_handler.h"
 #include <stddef.h>
 
 #define L1 1
@@ -10,7 +9,7 @@
 #define C3 7
 #define C4 8
 
-
+void set_pin(int id, short state, size_t *row, size_t *col, char *sequence, size_t *pointer);
 
 void student(char *sequence, size_t *pointer)
 {