7. CD Return System
This module has one main function:
Return CD
= Accept the CD Number
· CD Number must be an existing CD Number (should be existing in cd.txt file and also in custcd.txt file)
· When an invalid CD Number is entered, display an error message and ask the user to re-enter the CD Number.
· If a valid CD number is entered, display the CD Title pertaining to the CD Number.
· If the CD Number is valid and already returned then display an appropriate error message.
= Display the Customer name who has taken the particular CD.
= Display the Issue Date of given CD
= Display the Return Date(use function fnGetCurrentDate(char acCurrDate[])), it should be current date (Date Functions will be provided)
= Display the Amount to be paid by the given customer.
· Find the number of days between Issue Date and Return Date( use function fnGetDateDiff(char acIssueDate[],char acReturnDate[]))
· Calculate the Amount to be Paid based on number of days
(Hint :( Current date - Issue Date)* 20 = ________ Rs/-)
· If the customer returns the CD on the same day then by default the Amount must be 20 Rs/-
= Update CD Status in both cd.txt and custcd.txt
· Update status as ‘A’ for Availability in cd.txt file
· Update status as ‘R’ for Returned along with the returned Date in custcd.txt file
= On successful Return, the control should return to the “CD Return System Screen†after displaying a message “CD Returned Successfullyâ€
