display.h + fix screendisply

Makefile

@@ -1,7 +1,7 @@
 # Variable
 CC = gcc
 CFLAGS = -Wall -Wextra $(shell pkg-config --cflags --libs sdl2)
-OBJ = main.o function.o
+OBJ = main.o function.o display.o
 TARGET = sokoban
 
 all: $(TARGET)
@@ -9,11 +9,14 @@ all: $(TARGET)
 $(TARGET): $(OBJ)
 	$(CC) $(CFLAGS) $(OBJ) -o $(TARGET)
 
-main.o : main.c
+main.o : main.c function.h
 	$(CC) $(CFLAGS) -c main.c
 
-function.o : function.c 
-	$(CC) $(CFLAGS) -c function
+function.o : function.c function.h
+	$(CC) $(CFLAGS) -c function.c
+
+display.o: display.c display.h
+	$(CC) $(CFLAGS) -c display.c
 
 clean :
 	rm -f $(OBJ) $(TARGET)