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b586eafd3b
LINE INPUT will now use the faster method if passed a file handle that has been opened FOR BINARY. As such, the _BLINEINPUT command has been removed. qb64.bas now takes advantage of this for reading from '$include files, at least in Include Manager 1. Some tweaking of internal/source/main.txt was required to get things into a sane state, so I'm holing off changing the compiler any further so the auto-builder can make sure everything's smoothed over. Note: Everything should still compile as normal; I'm just being overcautious.
47 lines
1.6 KiB
Plaintext
47 lines
1.6 KiB
Plaintext
The '''COMMAND$''' 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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