Inorder tree traversal in binary tree in C
- by srk
In the below code, I'am creating a binary tree using insert function and trying to display the inserted elements using inorder function which follows the logic of In-order traversal.When I run it, numbers are getting inserted but when I try the inorder function( input 3), the program continues for next input without displaying anything. I guess there might be a logical error.Please help me clear it.
Thanks in advance...
#include<stdio.h>
#include<stdlib.h>
int i;
typedef struct ll
{
int data;
struct ll *left;
struct ll *right;
} node;
node *root1=NULL; // the root node
void insert(node *root,int n)
{
if(root==NULL) //for the first(root) node
{
root=(node *)malloc(sizeof(node));
root->data=n;
root->right=NULL;
root->left=NULL;
}
else
{
if(n<(root->data))
{
root->left=(node *)malloc(sizeof(node));
insert(root->left,n);
}
else if(n>(root->data))
{
root->right=(node *)malloc(sizeof(node));
insert(root->right,n);
}
else
{
root->data=n;
}
}
}
void inorder(node *root)
{
if(root!=NULL)
{
inorder(root->left);
printf("%d ",root->data);
inorder(root->right);
}
}
main()
{
int n,choice=1;
while(choice!=0)
{
printf("Enter choice--- 1 for insert, 3 for inorder and 0 for exit\n");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("Enter number to be inserted\n");
scanf("%d",&n);
insert(root1,n);
break;
case 3:
inorder(root1);
break;
default:
break;
}
}
}
