Similar Binary Trees

Similar Binary Trees

I have written the following function to check of two b-trees are similar
or not. But I am not getting the desired output.
int bt_similar(btree *b1, btree *b2)
{
int m=1;
if
((b1->data==b2->data&&(((b1->lchild==NULL&&b2->lchild==NULL)||(b1->lchild!=NULL&&b2->lchild!=NULL))&&((b1->rchild==NULL&&b2->rchild==NULL)||(b1->rchild!=NULL&&b2->rchild!=NULL))))&&(m))
{
if (b1->lchild!=NULL)
m=bt_similar(b1->lchild,b2->lchild);
if (b1->rchild!=NULL)
m=bt_similar(b1->rchild,b2->rchild);
if (m)
return 1;
}
return 0;
}