CONTROLCHR: Difference between revisions
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* The [[OFF]] clause allows control characters 0 to 31 to be printed and not format printing as normal text characters. | * The [[OFF]] clause allows control characters 0 to 31 to be printed and not format printing as normal text characters. | ||
::For example: '''{{text|PRINT CHR$(13)|green}}''' 'will not move the cursor to the next line and '''{{text|PRINT CHR$(9)|green}}''' 'will not tab. | ::For example: '''{{text|PRINT CHR$(13)|green}}''' 'will not move the cursor to the next line and '''{{text|PRINT CHR$(9)|green}}''' 'will not tab. | ||
* The default [[ON]] statement allows [[ASCII#Control_Characters|Control Characters]] to be used as control commands where some will not print or will format prints. | * The default [[ON]] statement allows [[ASCII#Control_Characters|Control Characters]] to be used as control commands where some will not print or will format prints. | ||
* '''Note:''' File prints may be affected also when using Carriage Return or Line Feed/Form Feed formatting. | * '''Note:''' File prints may be affected also when using Carriage Return or Line Feed/Form Feed formatting. | ||
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{{Cl|IF...THEN|IF}} (i {{Cl|AND (boolean)|AND}} {{Cl|&H}}F) = 0 {{Cl|THEN}} {{Cl|LOCATE}} 1 + i \ {{Cl|&H}}10, 20 | {{Cl|IF...THEN|IF}} (i {{Cl|AND (boolean)|AND}} {{Cl|&H}}F) = 0 {{Cl|THEN}} {{Cl|LOCATE}} 1 + i \ {{Cl|&H}}10, 20 | ||
{{Cl|LOOP}} {{Cl|WHILE}} i | {{Cl|LOOP}} {{Cl|WHILE}} i | ||
{{Cl|END}} | {{Cl|END}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
Revision as of 01:19, 23 January 2023
The _CONTROLCHR statement can be used to turn OFF control character attributes and allow them to be printed.
Syntax
- _CONTROLCHR {OFF|ON}
Description
- The OFF clause allows control characters 0 to 31 to be printed and not format printing as normal text characters.
- For example: PRINT CHR$(13) 'will not move the cursor to the next line and PRINT CHR$(9) 'will not tab.
- The default ON statement allows Control Characters to be used as control commands where some will not print or will format prints.
- Note: File prints may be affected also when using Carriage Return or Line Feed/Form Feed formatting.
- The QB64 IDE may allow Alt + number pad character entries, but they must be inside of STRING values. Otherwise the IDE may not recognize them.
Examples
Example: Printing the 255 ASCII characters in SCREEN 0 with 32 colors.
DIM i AS _UNSIGNED _BYTE WIDTH 40, 25 CLS _CONTROLCHR OFF i = 0 DO PRINT CHR$(i); i = i + 1 IF (i AND &HF) = 0 THEN PRINT LOOP WHILE i LOCATE 1, 20 DO COLOR i AND &HF OR (i AND &H80) \ &H8, (i AND &H70) \ &H10 PRINT CHR$(i); i = i + 1 IF (i AND &HF) = 0 THEN LOCATE 1 + i \ &H10, 20 LOOP WHILE i END |
See also