#include //create a to do list. #include #include

using namespace std; struct Task { string description; bool completed;

Task(const string& desc) : description(desc), completed(false) {}

}; void addTask(vector& tasks, const string& description) { tasks.push_back(Task(description)); cout << "Task added: " << description << endl; } void viewTasks(const vector& tasks) { if (tasks.empty()) { cout << "No tasks in the list." << endl; return; }

for (size_t i = 0; i < tasks.size(); ++i) {
    cout << i + 1 << ". " << tasks[i].description
         << " [" << (tasks[i].completed ? "Completed" : "Pending") << "]" << endl;
}

} void markTaskCompleted(vector& tasks, size_t index) { if (index > 0 && index <= tasks.size()) { tasks[index - 1].completed = true; cout << "Task marked as completed: " << tasks[index - 1].description << endl; } else { cout << "Invalid task index." << endl; } } void removeTask(vector& tasks, size_t index) { if (index > 0 && index <= tasks.size()) { cout << "Task removed: " << tasks[index - 1].description << endl; tasks.erase(tasks.begin() + (index - 1)); } else { cout << "Invalid task index." << endl; } }

int main() { vector tasks; int choice; string description; size_t index;

while (true) {
    cout << "\nTo-Do List Manager\n";
    cout << "1. Add Task\n";
    cout << "2. View Tasks\n";
    cout << "3. Mark Task as Completed\n";
    cout << "4. Remove Task\n";
    cout << "5. Exit\n";
    cout << "Enter your choice: ";
    cin >> choice;

    switch (choice) {
        case 1:
            cout << "Enter task description: ";
            cin.ignore();
            getline(cin, description);
            addTask(tasks, description);
            break;
        case 2:
            viewTasks(tasks);
            break;
        case 3:
            cout << "Enter task number to mark as completed: ";
            cin >> index;
            markTaskCompleted(tasks, index);
            break;
        case 4:
            cout << "Enter task number to remove: ";
            cin >> index;
            removeTask(tasks, index);
            break;
        case 5:
            cout << "Exiting!" << endl;
            return 0;
        default:
            cout << "Invalid. Please try again." << endl;
            break;
    }
}

return 0;

}