1, the system in order to work the way the menu, the password login. 2, book information, input function (an increase of data). 3, book information, remove (delete data). 4, book information, browsing (search data). 5, book information, delete (revised data). 6,] the calculation of book information, and sorting. Calculate the total price of all books and the average price (aver, single-precision, output a decimal), will include all data elements of an array sorted in descending order by price printed

market.txt

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