Functions for inserting and deleting at either end of deque, Data Structure & Algorithms

Assignment Help:

Q. Devise a representation for a given list where insertions and deletions can be made at both the ends. Such a structure is called Deque (which means Double ended queue). Write functions for inserting and deleting at both the ends.

Ans:

struct Deque

{

int info;

struct Deque *left, *right;

{

struct Deque *temp;

temp = malloc (sizeof(struct Deque), 1);

temp -> info = x;

{

}

else if(p == tail)

{

temp->left = tail; temp->right = NULL; tail->right = temp; tail = temp;

}

}

delete(struct Deque *p, int x)

{

struct Deque *temp;

{

head->left = NULL; temp->right = NULL; free(temp);

}

else if(p == tail)

{

temp = tail;

tail = tail->left; tail->right = NULL; temp->left = NULL; free(temp);

}

}

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