public BookReaderB() { name = new ColumnSeprator(1, 30); isbn = new ColumnSeprator(31, 51); author = new ColumnSeprator(52, 72); }
public BookReaderA() { name = new ColumnSeprator(1, 20); isbn = new ColumnSeprator(21, 41); author = new ColumnSeprator(42, 62); }