پروژه دفترچه تلفن

				
					#include <iostream>
#include <fstream>
#include <string>
using namespace std;

struct Contact {
    string name;
    string phone;
    Contact* next;
};

class PhoneBook {
private:
    Contact* head;
public:
    PhoneBook() : head(nullptr) {}

    void addContact(string name, string phone) {
        Contact* newContact = new Contact{name, phone, nullptr};
        if (!head) {
            head = newContact;
        } else {
            Contact* temp = head;
            while (temp->next) {
                temp = temp->next;
            }
            temp->next = newContact;
        }
        cout << "Contact added successfully!\n";
    }

    void searchContact(string name) {
        Contact* temp = head;
        while (temp) {
            if (temp->name == name) {
                cout << "Name: " << temp->name << ", Phone: " << temp->phone << endl;
                return;
            }
            temp = temp->next;
        }
        cout << "Contact not found!\n";
    }

    void deleteContact(string name) {
        if (!head) return;
        if (head->name == name) {
            Contact* temp = head;
            head = head->next;
            delete temp;
            cout << "Contact deleted successfully!\n";
            return;
        }
        Contact* temp = head;
        while (temp->next) {
            if (temp->next->name == name) {
                Contact* toDelete = temp->next;
                temp->next = temp->next->next;
                delete toDelete;
                cout << "Contact deleted successfully!\n";
                return;
            }
            temp = temp->next;
        }
        cout << "Contact not found!\n";
    }

    void displayContacts() {
        Contact* temp = head;
        while (temp) {
            cout << "Name: " << temp->name << ", Phone: " << temp->phone << endl;
            temp = temp->next;
        }
    }

    void saveToFile(string filename) {
        ofstream file(filename);
        Contact* temp = head;
        while (temp) {
            file << temp->name << "," << temp->phone << endl;
            temp = temp->next;
        }
        file.close();
        cout << "Contacts saved to file!\n";
    }

    void loadFromFile(string filename) {
        ifstream file(filename);
        string line;
        while (getline(file, line)) {
            size_t pos = line.find(",");
            string name = line.substr(0, pos);
            string phone = line.substr(pos + 1);
            addContact(name, phone);
        }
        file.close();
        cout << "Contacts loaded from file!\n";
    }
};

int main() {
    PhoneBook pb;
    pb.loadFromFile("contacts.txt");
    pb.addContact("Ali", "123456789");
    pb.addContact("Reza", "987654321");
    pb.displayContacts();
    pb.searchContact("Ali");
    pb.deleteContact("Reza");
    pb.displayContacts();
    pb.saveToFile("contacts.txt");
    return 0;
}