{ Here you'll experiment taking input from two different
  places.
  
  1. Compile and run this program as it is.
  
  2. Now, create a file (call it whatever you like--I'll call
  my example "inputFile") with one line containing two integers
  on the line.  Save the file, and then run the program
  "inputAndOutput" like this:
  
      inputAndOutput < inputFile

  What appeared in your terminal window, and what didn't?
  
  
  3. Next, you can also send the output to a file, like this
  
     inputAndOutput < inputFile > outputFile
	
  What appears in your terminal window?  Do an "ls" to see
  whether "outputFile" exists.  Type "more outputFile" to take
  a look at it (or open "outputFile" with Edit).
  
  
  4. One last thing, a bit weirder.  Try
  
     inputAndOutput > outputFile
	
  Can you make the program stop running?  How?  What appears in
  "outputFile"?  (If you are stuck with a program that won't stop,
  you can always try typing "Control-C," that is, holding down the
  Ctrl key and then typing C.
  
}

program inputAndOutput(input,output);

var	a, b : integer;

begin
	write( 'Please type two integers separated by a space: ' );
	readln( a, b );
	writeln( 'The sum of ', a, ' and ', b, ' is ', a + b )
end.