Fixed negative number issue

Makefile

@@ -0,0 +1,22 @@
+LFLAGS = -lm
+CFLAGS = -Wall
+CC = gcc
+
+BUILD_ROOT=.
+SDIR=$(BUILD_ROOT)/src
+BDIR=$(BUILD_ROOT)/build
+
+$(BDIR)/ee: $(BDIR) $(SDIR)/$(wildcard *.c)
+	$(CC) $(CFLAGS) $(LFLAGS) -o $@ src/ee.c
+
+$(BDIR):
+	mkdir $(BDIR)
+
+ee: $(BDIR)/ee
+
+clean:
+	$(MAKE) --no-print-directory -C $(SRC_DIR) clean
+	rm -rf $(BUILD_DIR)/*
+
+install:
+run: test