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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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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.
47 lines
1.6 KiB
Plaintext
47 lines
1.6 KiB
Plaintext
The '''COMMAND$''' function returns the DOS commandline arguments passed when a program is run.
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''Syntax:'' variable$ = COMMAND$
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* The [[STRING|string]] return value is any parameter following the filename in a [[RUN]] or command line statement.
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* Qbasic returns [[UCASE$|uppercase]] [[STRING]] parameters no matter what case they were sent originally.
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* '''QB64''' does not '''require or return all [[UCASE$|uppercase]]''' values so keep that fact in mind when checking parameters passed!
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* Useful when the programmer wants to add options to the command line of a program for later use by another program.
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* COMMAND$ was not available in QuickBasic versions below 4.0
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''Example:'' Compile both programs. ProgramA [[RUN]]s ProgramB with a parameter passed following the filename:
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{{CodeStart}}
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{{Cl|LOCATE}} 12, 36: {{Cl|PRINT}} "ProgramA"
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{{Cl|LOCATE}} 23, 25: {{Cl|PRINT}} "Press any key to run ProgramB"
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K$ = {{Cl|INPUT$}}(1)
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{{Cl|RUN}} "ProgramB FS" 'pass FS parameter to ProgramB in QB64
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{{Cl|END}}
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{{CodeEnd}}
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: ''ProgramB'' checks for fullscreen parameter pass in QB64 and goes full screen.
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{{CodeStart}} '' ''
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{{Cl|LOCATE}} 12, 36: {{Cl|PRINT}} "ProgramB"
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parameter$ = {{Cl|UCASE$}}({{Cl|COMMAND$}})
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{{Cl|LOCATE}} 20, 33: {{Cl|PRINT}} "Parameter = " + parameter$
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{{Cl|IF...THEN|IF}} {{Cl|LEFT$}}(parameter$, 2) = "FS" {{Cl|THEN}} {{Cl|_FULLSCREEN}} 'parameter changes to full screen
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{{Cl|END}} '' ''
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{{CodeEnd}}
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{{OutputStart}} Parameter = FS.EXE
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{{OutputEnd}}
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''See also:''
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* [[SHELL]], [[RUN]]
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* [[UCASE$]], [[LCASE$]]
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