Structure Chart for University User Login Processing

MODULE: Validate_User()

IF UserID not in USER table THEN

Display error_message

Stop

ENDIF

Retrieve Password from USER table

IF #Trial(Password) = 3 THEN

Deactivate_User(UserName)

Exit application

ENDIF

Retrieve UserType from USER table

IF UserType = “student” THEN

Open Student_Screen

ELSE IF UserType = “instructor” THEN

Open Instructor_Screen

ELSE IF UserType = “deactivated” THEN

Display deactivated_message

ENDIF

ENDIF

ENDIF

MODULE: #Trial(password)

SET #Trial = 1

DO WHILE #Trial < 3

IF password <> input_password THEN

Display error_message

Increment #Trial

ELSE

Exit DO

ENDIF

END DO

Return #Trial

MODULE: Deactivate_User(UserID)

OPEN USER table

Retrieve User record based on UserID

Change type field to “deactivated”

CLOSE table