modularization of c_index, basic balls data.

Makefile

@@ -8,6 +8,7 @@ CFLAGS=-Wall -g -O2 $(PROFILING_CFLAGS) $(GTK_CFLAGS)
 LIBS=$(GTK_LIBS) -lm
 
 PROGS=balls
+OBJS=balls.o c_index.o
 
 .PHONY: default
 default: all
@@ -19,9 +20,9 @@ run: balls
 .PHONY: all
 all: $(PROGS)
 
-balls: balls.o
-	$(CC) $(CFLAGS) $(LDFLAGS) $< $(LIBS) -o $@
+balls: $(OBJS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
 
 .PHONY: clean
 clean:
-	rm -f *.o $(PROGS)
+	rm -f *.o $(PROGS) $(OBJS)