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6e01fc8dce
Added new _STRCMP and _STRICMP commands for quick string comparisons. Cleaned up QB64 to finish removing the QUI (quick user insert) code and folders. Altered UCASE and LCASE routines to be faster in some situations for us.
45 lines
1.5 KiB
Plaintext
45 lines
1.5 KiB
Plaintext
The {{KW|ASC (statement)|ASC}} statement allows a '''QB64''' program to change a character at any position of a predefined {{KW|STRING}}.
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{{PageSyntax}}
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::: '''ASC({{Parameter|string_expression$}}'''[, {{Parameter|position%}}]''') =''' {{Parameter|code%}}
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{{PageDescription}}
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* The ''string expression'' variable must have been previously defined and cannot be an empty string("").
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* The ''position'' parameter is optional. If no position is used, the left-most position(1) is assumed.
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* The ''position'' cannot be zero or greater than the string's length [[LEN]] or an [[ERROR Codes|Illegal function error]] will occur.
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* The [[ASCII]] replacement ''code%'' value can be any [[INTEGER]] value from 0 to 255.
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* Some [[ASCII]] control characters will not [[PRINT]] a character or may format the [[SCREEN]]. [[_PRINTSTRING]] can print them graphically.
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''Example:'' Demonstrates how to change existing text characters one letter at a time.
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{{CodeStart}}
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a$ = "YZC"
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{{Cl|ASC (statement)|ASC}}(a$) = 65 ' CHR$(65) = "A"
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{{Cl|ASC (statement)|ASC}}(a$, 2) = 66 ' CHR$(66) = "B"
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{{Cl|PRINT}} a$ 'ABC
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{{Cl|ASC (statement)|ASC}}(a$, 2) = 0 ' CHR$(0) = " "
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{{Cl|PRINT}} a$
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{{Cl|ASC (statement)|ASC}}(a$, 2) = {{Cl|ASC}}("S") ' get code value from ASC function
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{{Cl|PRINT}} a$
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{{CodeEnd}}
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{{OutputStart}}
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ABC
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A C
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ASC
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{{OutputEnd}}
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''See also:''
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* [[ASC]] {{text|(function)}}
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* [[MID$ (statement)]]
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* [[_PRINTSTRING]]
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* [[INKEY$]], [[ASCII]]
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{{PageNavigation}} |