Add ContactManager.h

ContactManager.h

@@ -0,0 +1,20 @@
+#ifndef CONTACTMANAGER_H
+#define CONTACTMANAGER_H
+
+#include <vector>
+#include <fstream>
+#include "Contact.h"
+
+class ContactManager {
+private:
+    std::vector<Contact> contacts;
+
+public:
+    void addContact(const std::string& name, const std::string& phone, const std::string& email);
+    void removeContact(const std::string& name);
+    void displayContacts();
+    void saveToFile(const std::string& filename);
+    void loadFromFile(const std::string& filename);
+};
+
+#endif // CONTACTMANAGER_H