Define a class book, including the title, press, attributes, such as price members Print () method can output on the screen title, price, press; Add modify and reads a book title, price, press method, on the basis of the book class respectively derived class journals and monographs, journals increase property issues, increase the author attributes monographs, corresponding the Print () method should be able to increase output properties, define an array used to store a variety of publications, and then output publication details,