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49 lines
1.9 KiB
Text
49 lines
1.9 KiB
Text
{{DISPLAYTITLE:_CONTROLCHR}}
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The [[_CONTROLCHR]] statement can be used to turn OFF control character attributes and allow them to be printed.
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{{PageSyntax}}
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: [[_CONTROLCHR]] {OFF|ON}
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{{PageDescription}}
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* The [[OFF]] clause allows control characters 0 to 31 to be printed and not format printing as normal text characters.
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::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.
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* 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.
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* '''Note:''' File prints may be affected also when using Carriage Return or Line Feed/Form Feed formatting.
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* 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.
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{{PageExamples}}
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''Example:'' Printing the 255 [[ASCII]] characters in [[SCREEN]] 0 with 32 colors.
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{{CodeStart}} '' ''
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{{Cl|DIM}} i {{Cl|AS}} {{Cl|_UNSIGNED}} {{Cl|_BYTE}}
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{{Cl|WIDTH}} 40, 25
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{{Cl|CLS}}
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{{Cl|_CONTROLCHR}} OFF
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i = 0
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DO
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{{Cl|PRINT}} {{Cl|CHR$}}(i);
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i = i + 1
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{{Cl|IF...THEN|IF}} (i {{Cl|AND (boolean)|AND}} {{Cl|&H}}F) = 0 {{Cl|THEN}} {{Cl|PRINT}}
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{{Cl|LOOP}} {{Cl|WHILE}} i
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{{Cl|LOCATE}} 1, 20
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DO
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{{Cl|COLOR}} i {{Cl|AND (boolean)|AND}} {{Cl|&H}}F {{Cl|OR (boolean)|OR}} (i {{Cl|AND (boolean)|AND}} {{Cl|&H}}80) \ {{Cl|&H}}8, (i {{Cl|AND (boolean)|AND}} {{Cl|&H}}70) \ {{Cl|&H}}10
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{{Cl|PRINT}} {{Cl|CHR$}}(i);
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i = i + 1
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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
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{{Cl|LOOP}} {{Cl|WHILE}} i
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{{Cl|END}} '' ''
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{{CodeEnd}}
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{{PageSeeAlso}}
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* [[_CONTROLCHR (function)]]
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* [[CHR$]], [[ASC]]
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* [[INKEY$]], [[_KEYHIT]]
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* [[ASCII]] {{text|(codes)}}
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* [[ASCII#Control_Characters|Control Characters]]
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{{PageNavigation}}
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