phonebook.cpp

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
using namespace std;

// Structure to store contact details
struct Contact {
    string name;
    string phone;
};

vector<Contact> phonebook;

// Function to add a contact
void addContact() {
    Contact newContact;
    cout << "Enter Name: ";
    cin.ignore();
    getline(cin, newContact.name);
    cout << "Enter Phone Number: ";
    cin >> newContact.phone;
    phonebook.push_back(newContact);
    sort(phonebook.begin(), phonebook.end(), [](const Contact &a, const Contact &b) {
        return a.name < b.name;
    });
    cout << "Contact added successfully!\n";
}

// Function to display all contacts
void displayContacts() {
    if (phonebook.empty()) {
        cout << "Phonebook is empty!\n";
        return;
    }
    cout << "\nContacts List:\n";
    for (size_t i = 0; i < phonebook.size(); i++) {
        cout << i + 1 << ". Name: " << phonebook[i].name << ", Phone: " << phonebook[i].phone << "\n";
    }
}

// Function to search for a contact
void searchContact() {
    string query;
    cout << "Enter name or phone number to search: ";
    cin.ignore();
    getline(cin, query);
    
    auto it = find_if(phonebook.begin(), phonebook.end(), [&query](const Contact &c) {
        return c.name == query || c.phone == query;
    });
    
    if (it != phonebook.end()) {
        cout << "Found: Name: " << it->name << ", Phone: " << it->phone << "\n";
    } else {
        cout << "Contact not found!\n";
    }
}

// Function to delete a contact
void deleteContact() {
    string name;
    cout << "Enter the name of the contact to delete: ";
    cin.ignore();
    getline(cin, name);
    
    auto it = remove_if(phonebook.begin(), phonebook.end(), [&name](const Contact &c) {
        return c.name == name;
    });
    
    if (it != phonebook.end()) {
        phonebook.erase(it, phonebook.end());
        cout << "Contact deleted successfully!\n";
    } else {
        cout << "Contact not found!\n";
    }
}

// Main function to run the menu
int main() {
    int choice;
    do {
        cout << "\nPhonebook Management System\n";
        cout << "1. Add Contact\n";
        cout << "2. Display Contacts\n";
        cout << "3. Search Contact\n";
        cout << "4. Delete Contact\n";
        cout << "5. Exit\n";
        cout << "Enter your choice: ";
        cin >> choice;
        cin.ignore(); // Prevent issues with getline
        
        switch (choice) {
            case 1: addContact(); break;
            case 2: displayContacts(); break;
            case 3: searchContact(); break;
            case 4: deleteContact(); break;
            case 5: cout << "Exiting...\n"; break;
            default: cout << "Invalid choice! Try again.\n";
        }
    } while (choice != 5);
    
    return 0;
}