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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 '$include files, at least in Include Manager 1. Some tweaking of internal/source/main.txt was required to get things into a sane state, so I'm holing off changing the compiler any further so the auto-builder can make sure everything's smoothed over. Note: Everything should still compile as normal; I'm just being overcautious.
49 lines
1.4 KiB
Plaintext
49 lines
1.4 KiB
Plaintext
The '''OUTPUT''' file mode is used in an [[OPEN]] statement to send new data to Files or Ports.
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{{PageSyntax}}
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:: OPEN FileName$ FOR OUTPUT AS #1
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* OUTPUT mode erases all previous data in an existing file or clears a port receive buffer!
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* Creates an empty file if the filename does not exist. Use [[APPEND]] if previous file data is to be preserved.
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* Mode can use [[PRINT (file statement)|PRINT]], [[WRITE (file statement)|WRITE]] or [[PRINT USING (file statement)|PRINT USING]] to output file data.
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''Example:'' Writes new data to a text file sequentially and reads it back to the program screen.
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{{CodeStart}} '' ''
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filename$ = "testfile.dat"
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x = 1: y = 2: z$ = "Three"
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{{Cl|OPEN}} filename$ {{Cl|FOR...NEXT|FOR}} {{Cl|OUTPUT}} {{Cl|AS}} #1 'opens and clears an existing file or creates new empty file
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{{Cl|WRITE (file statement)|WRITE}} #1, x, y, z$
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{{Cl|CLOSE}} #1
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{{Cl|PRINT}} "File created with data. Press a key!"
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K$ = {{Cl|INPUT$}}(1) 'press a key
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{{Cl|OPEN}} filename$ {{Cl|FOR (file statement)|FOR}} {{Cl|INPUT (file mode)|INPUT}} {{Cl|AS}} #2 'opens a file to read it
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{{Cl|INPUT (file statement)|INPUT}} #2, a, b, c$
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{{Cl|CLOSE}} #2
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{{Cl|PRINT}} a, b, c$
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{{Cl|END}} '' ''
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{{CodeEnd}}
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''See also:''
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* [[APPEND]], [[RANDOM]]
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* [[INPUT (file mode)]], [[BINARY]]
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* [[WRITE]], [[INPUT (file statement)]]
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{{PageNavigation}} |