Introduction - If you have any usage issues, please Google them yourself
Phone book management. Stored data includes: name, company, phone number and E-mail address. Program has the following features: ① to add a new telephone number ② delete a phone number ③ show all the phone numbers stored. ④ modify function ⑤ sorting features, including sorting and in accordance with the telephone number listed in alphabetical order by name ⑥ query functions, including query by name phone number and name by telephone number search.