1 files changed, 158 insertions, 0 deletions
diff --git a/s.c b/s.c
new file mode 100644
index 0000000..2f82e6b
--- /dev/null
+++ b/s.c
@@ -0,0 +1,158 @@
+#include<stdio.h>
+#include<stdlib.h>
+
+struct node
+{
+    int data;
+    struct node *left,*right;
+};
+
+/* Function to count number of nodes in a Binary Tree */
+int count=0;
+struct node * createnode(struct node *newnode,int data)
+{
+    newnode=malloc(sizeof(struct node));
+    newnode->data=data;
+    newnode->left= newnode->right = NULL;
+    return newnode;
+}
+void insert(struct node **root,int data)
+{
+    struct node *newnode;
+    newnode=createnode(newnode,data);
+    if(*root==NULL)
+    *root=newnode;
+    else
+    {
+        struct node *temp=*root;
+        while(1)
+        {
+            if(data <= temp->data)
+            {
+                if(temp->left==NULL)
+                {temp->left=newnode;
+                break;}
+                temp=temp->left;
+            }
+            else
+            {  
+            if(temp->right==NULL)
+            {temp->right=newnode;
+            break;}
+            temp=temp->right;
+            }
+        }
+    }
+}
+
+void createbst(struct node **root)
+{
+    int n,i;
+    int data;
+    printf("Enter the number of nodes: ");
+    scanf("%d",&n);
+    for(i=0;i<n;i++)
+    {
+        printf("Enter data: ");
+        scanf("%d",&data);
+        insert(root,data);
+    }
+}    
+
+int search(struct node *root, int data)
+{if(root==NULL)
+printf("Empty Tree");
+    else
+    {
+        struct node *temp=root;
+        while(1)
+        {
+        if(data <= temp->data)
+            {
+            if(temp->left==NULL)
+            return 0;
+            temp=temp->left;
+            if(temp->data == data)
+            return 1;
+            }
+        else
+            { 
+            if(temp->right==NULL)
+            return 0;
+            temp=temp->right;
+            if(temp->data == data)
+            return 1;
+            }
+        }
+    }
+}
+
+void display(struct node *temp)
+{
+if(temp)
+{
+printf("%d",temp->data);
+display(temp->left);
+display(temp->right);
+}
+}
+void countNodes(struct node *temp)
+{
+if(temp)
+{
+count++;
+countNodes(temp->left);
+countNodes(temp->right);
+}
+}
+int menu()
+{
+int ch;
+printf("\n0.Exit");
+printf("\n1.Create tree");
+printf("\n2.Display tree");
+printf("\n3.Search a node");
+printf("\n4.Count nodes in the tree");
+
+printf("\nEnter your choice: ");
+scanf("%d",&ch);
+return ch;
+}
+
+main()
+{
+struct node *root= NULL;
+int ch;
+while((ch=menu())!=0)
+{
+if(ch==1)
+createbst(&root);
+else
+if(ch==2)
+{
+display(root);
+printf("\n");
+getchar();
+}
+else
+if(ch==3)
+{
+int data;
+printf("\nEnter data to be searched: ");
+scanf("%d",&data);
+
+if(search(root,data) == 1 )
+printf("Node %d is present in tree\n",data);
+else
+printf("Node %d is not present in tree\n",data);
+getchar();
+}
+else
+if(ch==4)
+{
+countNodes(root);
+printf("Nodes are : %d\n",count);
+getchar();
+}
+}
+}