add red black main functions

Makefile

@@ -16,8 +16,12 @@ hash:hash.c
 	gcc -o $@ $<
 hash.c:hash.h
 
-rb_tree:rb_tree.c rb_tree_main.c
+rb_tree:rb_tree.o rb_tree_main.o
 	gcc -o $@ $?
+rb_tree.o:rb_tree.c
+	gcc -c -o $@ $<
+rb_tree_main.o:rb_tree_main.c
+	gcc -c -o $@ $<
 
 clean:
 	rm -rf ./*.o hash_main bubble_sort hash br_tree

rb_tree.c

@@ -14,7 +14,7 @@ typedef enum color_t
 
 typedef struct rb_node_t
 {
-    struct rb_node_t *left, right, *parent;
+    struct rb_node_t *left, *right, *parent;
     key_t key;
     data_t data;
     color_t color;

rb_tree_main.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <string.h>
+
+int main( void )
+{
+
+    return 0;
+}