Introduction - If you have any usage issues, please Google them yourself
(1) set the following data items for each record: telephone number, username, and address;
(2) input each record from the keyboard and set up a Hash list with the telephone number as the key.
(3) the linear detection and re hash method is used to solve the conflict.
(4) find and display the record of a given phone number;
(5) the information file of the address book is saved.
(6) the human-machine interface is friendly and the graphical interface is used.