Algorithm to insert a node in between any two nodes, Data Structure & Algorithms

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Q. Write down an algorithm to insert a node in between any two nodes in a linked list       

Ans.

Insertion of a the node after the given element of the listis as follows

Node *  InsertAfterElement (node * start, int item, int after)

{

node * ptr, * loc;

ptr =(node *) malloc (sizeof (node));

ptr->info = item;

loc=start;

while (loc != NULL && loc->info != after)

loc= loc->next;

if (start==NULL) { ptr->next= NULL;

start = ptr;}

else if (loc l = NULL){ ptr->next = loc->next; loc->next= ptr;}

return start;

}


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