//  Fileprint.kt  (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2024-02-21  File created.

/*  Compilation and execution:

      c:\freeware\kotlinc\bin\kotlinc Fileprint.kt -include-runtime -d RunThis.jar

      java -jar RunThis.jar filename.txt

*/

import java.io.*

fun main( command_line_parameters : Array<String> )
{
   if ( command_line_parameters.size  ==  1 )
   {
      val file_name_from_user = command_line_parameters[ 0 ]
         
      try
      {
         val file_to_print = BufferedReader( FileReader( file_name_from_user ) )

         var line_counter = 0
            
         var end_of_file_encountered = false

         while ( end_of_file_encountered == false )
         {
            val text_line_from_file = file_to_print.readLine()
         
            if ( text_line_from_file == null )
            {
               end_of_file_encountered = true
            }
            else
            {
               print( text_line_from_file + "\n" )
               line_counter ++
            }
         }

         file_to_print.close()
         print( "\n  " + line_counter + " lines printed." )
      }
      catch ( caught_file_not_found_exception : FileNotFoundException )
      {
         print( "\n Cannot open file " +  file_name_from_user )
      }
      catch ( caught_io_exception : IOException )
      {
         print( "\n Error while processing file "  +  file_name_from_user )
      }
   }
   else
   {
      print( "\n You have to command this program so that"
          +  "\n you give the file name from command line \n")
   }
}