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print to different ports(lpt1,lpt2,lpt3....)

Posted on 1998-06-28
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Last Modified: 2013-11-15
Could not find a right place to ask this, so since I a need to do this in c++ , then I ask here....sorry.

I need to send output to different parallel ports for printing. stdprn is mapped to LPT1, how can I print in c++ to LPT2, LPT3, and so on...
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Question by:migue
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4 Comments
 
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by:chensu
ID: 1166761
What operating system?
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nietod earned 30 total points
ID: 1166762
Just open them like a file.

ofstream LPT2("LPT2");

LPT2 ,<< "This Is a Test" << endl;
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Author Comment

by:migue
ID: 1166763
this solution is for a dos-protected program running on plain dos and any version of windows.
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by:nietod
ID: 1166764
Then just open the printer port as a file.  You can use an output file stream as  I showed you above.  Or you can use the C file I/O functions (fopen(), fwrite(), fclose()) or you can even use the DOS service interrupts.
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