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Library management system, how to use two arrays together

2022-02-02 21:44:46 CSDN Q & A

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To guide the fourth point, how to write the method of searching books by book number , Do you want to define two arrays , If it is how to use the book number to query books




Refer to the answer 1:

Map<BookNo,BookEnrty>




Refer to the answer 2:

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