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LOCATE Statement Programming Examples
                       Example                 Contents  Index  Back
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'These examples use the LOCATE statement to move the cursor and to select
'items from a menu.
 
'This example shows the effect of different LOCATE statements on the cursor.
 
CLS                       'Clear screen.
LOCATE 5, 5               'Moves cursor to row 5, column 5.
PRINT "C"
DO
LOOP WHILE INKEY$ = ""    'Press any key to continue.
LOCATE 1, 1               'Moves cursor to upper-left corner of the screen.
PRINT "C"
DO
LOOP WHILE INKEY$ = ""    'Press any key to continue.
LOCATE , , 1              'Makes the cursor visible; position remains
                          'unchanged.
PRINT "C"
DO
LOOP WHILE INKEY$ = ""    'Press any key to continue.
LOCATE , , , 7            'Position and cursor visibility remain unchanged;
                          'sets the cursor to display at the bottom of
                          'the character box starting and ending on
                          'scan line 7.
PRINT "C"
DO
LOOP WHILE INKEY$ = ""    'Press any key to continue.
LOCATE 5, 1, 1, 0, 7      'Moves the cursor to line 5, column 1;
                          'turns cursor on; cursor covers entire
                          'character cell starting at scan line
                          '0 and ending on scan line 7.
PRINT "C"
DO
LOOP WHILE INKEY$ = ""    'Press any key to continue.
END
 
'This example prints a menu on the screen, then waits for input in the
'allowable range (1-4). If a number outside that range is entered, the
'program continues to prompt for a selection.
 
'Note: This program is incomplete. Do not try to run it in its current form.
 
CONST FALSE = 0, TRUE = NOT FALSE
DO
         CLS
         PRINT "MAIN MENU": PRINT
         PRINT "1)  Add Records"
         PRINT "2)  Display/Update/Delete a Record"
         PRINT "3)  Print Out List of People Staying at Hotel"
         PRINT "4)  End Program"
         'Change cursor to a block.
         LOCATE , , 1, 1, 12
         LOCATE 12, 1
         PRINT "What is your selection?";
         DO
                 CH$ = INPUT$(1)
         LOOP WHILE (CH$ < "1" OR CH$ > "4")
         PRINT CH$
 
' Call the appropriate subprogram.
         SELECT CASE VAL(CH$)
                 CASE 1
                        CALL Add
                 CASE 2
                        CALL Search
                 CASE 3
                        CALL Hotel
                 CASE 4
                        CALL Quit
         END SELECT
LOOP WHILE NOT ENDPROG
'  .
'  .
'  .
END