English Dictionaries: Write a C++ program that build and maintain a data structure to efficiently locate, insert, and delete a record from English dictionary. Implement dictionary using single sorted linked list.
#include <iostream>
using namespace std;
/* Link list node */
struct Node
{
int key;
string data;
Node* next;
};
class singleSortedlinkedlist{
private:
Node *head;
public:
singleSortedlinkedlist():head(NULL){
}
Node *newNode(int key, string
new_data) {
/* allocate node
*/
Node* new_node
=new Node();
new_node->data = new_data;
new_node->key
= key;
new_node->next = NULL;
return
new_node;
}
/* function to insert a new_node in
a list.)*/
void sortedInsert(int key, string
data)
{
Node*
current;
/* Special case
for the head end */
Node *new_node =
this->newNode(key, data);
if
(this->head == NULL || this->head->key >=
new_node->key)
{
new_node->next = this->head;
this->head = new_node;
}
else
{
/* Locate the node before the point of insertion
*/
current = this->head;
while (current->next!=NULL &&
current->next->key <
new_node->key)
{
current =
current->next;
}
new_node->next = current->next;
current->next = new_node;
}
}
/* Function to print linked list
*/
void printList()
{
Node *temp =
this->head;
while(temp !=
NULL)
{
cout<<temp->key<<" :
"<<temp->data<<", ";
temp = temp->next;
}
}
/* Function to delete a node from
linked list */
void deleteNode(int key){
Node *temp =
this->head;
Node
*prev;
if(temp->key
== key){
this->head = this->head->next;
return;
}
prev =
temp;
temp =
temp->next;
while(temp !=
NULL){
if(temp->key == key){
prev->next =
temp->next;
return;
}
prev = temp;
temp = temp->next;
}
}
};
/* Driver program to test count function*/
int main()
{
/* Start with the empty list */
singleSortedlinkedlist sl;
sl.sortedInsert(1,"hello");
sl.sortedInsert(5,"bye");
sl.sortedInsert(2,"namaste");
sl.sortedInsert(6,"go");
sl.sortedInsert(3,"away");
cout<<"before deletion."<<endl;
sl.printList();
sl.deleteNode(3);
cout<<"\nafter deletion."<<endl;
sl.printList();
return 0;
}
Output:

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