Task

Cause a line printer attached to the computer to print a line containing the message:    Hello World! 



Note

A line printer is not the same as standard output.

A   line printer   was an older-style printer which prints one line at a time to a continuous ream of paper.

With some systems, a line printer can be any device attached to an appropriate port (such as a parallel port).




integer fn = open(iff(platform()=WIN32?"PRN":"/dev/lp0"),"w")
if fn=-1 then
    puts(1,"some error")
else
    puts(fn,"Hello World!")
    close(fn)
    puts(1,"success!")
end if
{} = wait_key()
