QBASIC Menu drive Basic Program to Add and Display the record of "contact.dat" data file (Class 10 SEE)

QBASIC Menu driven program

It is a menu-driven BASIC program to handle the following cases. 

1. To enter the data refer to Name, Address, and Telephone Number
2. To display all the records from the "address.dat" data file
3. To Quit the Program

CLS
top:
CLS
PRINT "*-*-*-*-Main Menu-*-*-*-*"
PRINT " 1. Add Contact "
PRINT " 2. View Contact "
PRINT " 3. Quit"
INPUT "Enter Your Choice !! (1/2/3) : "; ch
SELECT CASE ch
    CASE 1:
        CALL addcontact
        GOTO top
    CASE 2
        CALL viewcontact
        GOTO top
    CASE 3
        SYSTEM
    CASE ELSE
        PRINT "Wrong Choice ! Try Again !!"
END SELECT
END


' SUB Module for adding contact
SUB addcontact
    CLS
    OPEN "contact.dat" FOR APPEND AS #1
    DO
        PRINT "*-*-*-Add Contact-*-*-*"
        INPUT "Enter Name : "; n$
        INPUT "Enter Address : "; a$
        INPUT "Enter Phone : "; p#
        WRITE #1, n$, a$, p#
        INPUT "Do you want to add more records ? (Y/N) : "; ch$
    LOOP WHILE UCASE$(ch$) = "Y"
    CLOSE #1
END SUB


'SUB Module for display contact
SUB viewcontact
    CLS
    OPEN "contact.dat" FOR INPUT AS #2
    PRINT "*-*-*-View Contact-*-*-*"
    PRINT "Name", "Address", "Phone"
    DO WHILE NOT EOF(2)
        INPUT #2, n$, a$, p#
        PRINT n$, a$, p#
    LOOP
    INPUT ""; k
    CLOSE #2
END SUB