i am trying the following code to print the message. it is working well in a system having a printer connected through com1.
But is not working in other system that using usb port.
what should i do.

ofstream outfile;
outfile<<"\nThis is test printing";

I don't think you need to change anything in the code. Or in other words, I don't think you can change your code and make it work. It should be a matter of configuration of the printer. (which I have no clue).

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