1928: Book_TextBook_Novel

define a Book class，which contains three data fields: ISBN 、name and price；

define a TextBook class and Novel class by extending Book class ,respectively，TextBook has a new data field: discipline，Novel has two new data field: type and sales

output the information of the TextBook or the Novel as required

the price has one decimal

for novel,if the sales is beyond 100,the output is a little different 

N 968889701120 living 36.5 literature 100
T 968889701122 JAVA 57.9 computer
T 968889731122 theoryOfInformation 45 communication  
N 968889701404 Harry 100 fiction 10089

The literature Novel:968889701120 living 36.5, sales 100
The computer TextBook:968889701122 JAVA 57.9
The communication TextBook:968889731122 theoryOfInformation 45.0  
The fiction Novel:968889701404 Harry 100.0, sales well, 10089