```
    #import "RootViewController.h"
    #import "DetailViewController.h"

    @implementation RootViewController

    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath      *)indexPath {
    // UITableViewStyleGrouped table view style will cause the table have a textured background
    // and each section will be separated from the other ones.
    DetailViewController *controller = [[DetailViewController alloc]
                                        initWithStyle:UITableViewStyleGrouped
                                        andfileData:[dao   libraryItemAtIndex:indexPath.row]];
    controller.title = [[dao libraryItemAtIndex:indexPath.row] valueForKey:@"Description"];
    [self.navigationController pushViewController:controller animated:YES];
    [controller release];
} 

```

compile with error..had imported all the files..wat went wrong?