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Ingy döt Net 2023-07-01 11:58:00 -04:00
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IDENTIFICATION DIVISION.
PROGRAM-ID. terminal-colour-bars.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 width PIC 9(3).
01 height PIC 9(3).
01 interval PIC 9(3).
01 colours-area.
03 colour-values.
05 FILLER PIC 9 VALUE 0. *> Black
05 FILLER PIC 9 VALUE 4. *> Red
05 FILLER PIC 9 VALUE 2. *> Green
05 FILLER PIC 9 VALUE 1. *> Blue
05 FILLER PIC 9 VALUE 5. *> Magneta
05 FILLER PIC 9 VALUE 3. *> Cyan
05 FILLER PIC 9 VALUE 6. *> Yellow
05 FILLER PIC 9 VALUE 7. *> White
03 colour-table REDEFINES colour-values.
05 colours PIC 9 OCCURS 8 TIMES INDEXED BY colour-index.
01 i PIC 9(3).
01 j PIC 9(3).
PROCEDURE DIVISION.
ACCEPT width FROM COLUMNS
ACCEPT height FROM LINES
DIVIDE width BY 8 GIVING interval
PERFORM VARYING i FROM 1 BY 1 UNTIL height < i
PERFORM VARYING j FROM 1 BY 1 UNTIL width < j
COMPUTE colour-index = (j / interval) + 1
IF 8 < colour-index
SET colour-index TO 8
END-IF
*> Some colours come a bit darker than they
*> should, with the yellow being orange and the white
*> being light-grey.
DISPLAY SPACE AT LINE i COLUMN j
WITH BACKGROUND-COLOR colours (colour-index)
END-PERFORM
END-PERFORM
ACCEPT i *> Prevent ncurses returning to console immediately.
GOBACK
.