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Ds Practical 7

The document presents a C++ implementation of a telephone book using a hash table for efficient client lookup. It includes methods for inserting client information, searching for a client's phone number, and displaying all entries. The main function demonstrates the usage of these methods with sample client data.

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23 views2 pages

Ds Practical 7

The document presents a C++ implementation of a telephone book using a hash table for efficient client lookup. It includes methods for inserting client information, searching for a client's phone number, and displaying all entries. The main function demonstrates the usage of these methods with sample client data.

Uploaded by

karan.ppjgk22
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Practical No.

Q. Consider telephone book database of N clients. Make use of a hash table


implementation to quickly look up client‘s telephone number.

#include <iostream>

#include <unordered_map>

#include <string>

using namespace std;

class TelephoneBook {

private:

unordered_map<string, string> phoneBook;

public:

void insertClient(const string& name, const string& phoneNumber) {

phoneBook[name] = phoneNumber;

cout << "Inserted: " << name << " → " << phoneNumber << endl;

void searchClient(const string& name) {

if (phoneBook.find(name) != phoneBook.end()) {

cout << "Found: " << name << " → " << phoneBook[name] << endl;

} else {

cout << "Client '" << name << "' not found.\n";

void displayAll() {

cout << "\n--- Telephone Book ---\n";

for (const auto& entry : phoneBook) {


cout << entry.first << " → " << entry.second << endl;

};

int main() {

TelephoneBook book;

book.insertClient("Alice", "123-456-7890");

book.insertClient("Bob", "987-654-3210");

book.insertClient("Charlie", "555-555-5555");

book.searchClient("Bob");

book.searchClient("David");

book.displayAll();

return 0;

Output:-

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