Description: with two-way linked list, document literacy knowledge of the preparation of simple correspondence, it can record the name, gender, date of birth, zip code, address, telephone number and so on. From the first of the show from the last one that can be turned on over the next visit. Can be added, deleted, inserted, identify, preserve, such as directories from the basic operation. Friendly interface, input and output more humanized, keyboard response, tips, user-friendly operation of the business.
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