Remote-processing CAMBASIC Manuel d'utilisateur télécharger pdf (Page 21)

Program Editing - 2

Executing the EDIT statement will cause the target line to be displayed. Below this line the line number will be displayed

again and the cursor will be positioned at the start of the line. In the following text, the notation < ENT ER> means press

the key enclosed by the < > . The under line shows the cursor position.

CURSOR MOVEMENT

The display will appear as above. Pr ess < SPC> twice. You w ill notice that the first two characters appear as the cursor

moves to the right. Now p ress < 4> and then < SPC> . The cursor now moves 4 spaces to the right.

Press < SPC> twice. The characters seem to be erased but are not. You can confirm this by pressing < SPC> twice

again.

You cannot move the cursor with the < SPC> beyond the end of the line or with the < SPC> to the left of the text.

Editing the line number is not allowed.

Now press < ENTE R> . The line is reprinted and then saved. In this case no editing took place. This line will be used

throughout this section.

Now type a period “ . ” .

You will notice that line 10 once again appears for editing. This is the quick form of editing. The “.” command causes

the “current” line to be edited.

LINE EDITING COMMANDS

A Abort All Changes And Reenter The Edit Mode

If you change your mind in the middle of an edit, you can use the “A” com mand to cancel all the

editing work done on the line so far and redisplay the command for further editing.

If you are in the Insert Mode when the decision to abandon the edit occurs, you must exit the Insert

Mode. To get out of the Insert Mode, press the < ESC> key then press < A> .

D Delete

To delete a character move the cursor to the character to be deleted. Note that the character is not

printed at the cursor. Now press the < D> on a terminal (do not press < ENTER> yet). If several

characters are to be deleted, press the number first and then the < D> key.

The cursor will move leaving blanks where the deleted characters are. Now press < ENTER> .

The line is reprinted with the blanks indicating the edit. The blanks are not stored in the text. You

can confirm this by executing:

>LIST [line]

CAM BASIC will not let you delete more characters than exist on a line. There is no way to undo a

delete except by performing an Abort < A> . To view the changes to the line, type < L> . The

entire line will be displayed.

ESC Escape From Insert And Replace Modes

This command turns off the Insert Mode. If you wish to use other editing commands while in Insert

Mode, you must press < ESC> .

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Remote-processing CAMBASIC Manuel d'utilisateur Page 21