Introduction - If you have any usage issues, please Google them yourself
By displaying the menu prompts, enter the password, change your password, end the program. Requirements: to achieve the program flow chart (20 points) Password judgment (15 points) to achieve the password change (15 points) to achieve the program ends normally (5) the accuracy of delay for non-software (5 points) input errors automatically after 3 end of the program (20 points)