Introduction - If you have any usage issues, please Google them yourself
Phonebook 1. simple phone book function to search for a phone number with a name 2. the user to enter a name, the program finds and outputs the result 3. The user can enter, add the name and phone number 4. You can delete names and phone numbers 5. phone book can be saved in the specified file 6. telephone can be read the specified file into memory.