3 files changed, 97 insertions, 0 deletions
diff --git a/tree/data_structures.h b/tree/data_structures.h
new file mode 100644
index 0000000..dbc7bdc
--- /dev/null
+++ b/tree/data_structures.h
@@ -0,0 +1,14 @@
+#ifndef DATA_STRUCTURES_H
+#define DATA_STRUCTURES_H
+
+struct node {
+	int val;
+	struct node *left;
+	struct node *right;
+};
+
+extern struct node *root;
+
+struct node *insert(struct node* cur, int val);
+
+#endif
diff --git a/tree/node.c b/tree/node.c
new file mode 100644
index 0000000..c0d7738
--- /dev/null
+++ b/tree/node.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "data_structures.h"
+
+struct node *root = NULL;
+
+struct node
+*create(int val)
+{
+	struct node *tmp = malloc(sizeof(struct node));
+	tmp->val = val;
+	tmp->left = NULL;
+	tmp->right = NULL;
+	return tmp;
+}
+
+struct node
+*insert(struct node *cur, int val)
+{
+	if (cur == NULL) {
+		return create(val);
+	}
+	if (val < cur->val) {
+		cur->left = insert(cur->left, val);
+	} else if (val > cur->val) {
+		cur->right = insert(cur->right, val);
+	}
+	return cur;
+}
diff --git a/tree/tree.c b/tree/tree.c
new file mode 100644
index 0000000..82b4544
--- /dev/null
+++ b/tree/tree.c
@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "data_structures.h"
+
+void
+pre_order(struct node *cur)
+{
+	if (cur == NULL) {
+		return;
+	}
+	printf("%d ", cur->val);
+	pre_order(cur->left);
+	pre_order(cur->right);
+}
+
+void
+in_order(struct node *cur)
+{
+	if (cur == NULL) {
+		return;
+	}
+	in_order(cur->left);
+	printf("%d ", cur->val);
+	in_order(cur->right);
+}
+
+void
+post_order(struct node *cur)
+{
+	if (cur == NULL) {
+		return;
+	}
+	post_order(cur->left);
+	post_order(cur->right);
+	printf("%d ", cur->val);
+}
+
+int
+main()
+{
+	struct node *root = NULL;
+	root = insert(root, 10);
+	int val, n = 0;
+	printf("How many integers do you want to add to root with val 10?\n");
+	scanf("%d", &n);
+	for (int i = 0; i < n; ++i) {
+		printf("Enter a number \n");
+		scanf("%d", &val);
+		insert(root, val);
+		in_order(root);
+		printf("\n");
+	}
+	return 0;
+}