Write C code to determine if two trees are identical

Here is a C program using recursion

  1. int identical(struct node* a, struct node* b) 
  2. { 
  3.   if (a==NULL && b==NULL){return(true);} 
  4.   else if (a!=NULL && b!=NULL) 
  5.   { 
  6.     return(a->data == b->data && 
  7.            identical(a->left, b->left) && 
  8.            identical(a->right, b->right)); 
  9.   } 
  10.   else return(false); 
  11. }