/*  @(#)filter.c	1.1   12/9/92   */
/*
 *  File : filter.c
 *
 *  Input : File containing M lines of N strings each
 *  Output : File containing, for each line, the strings
 *                          <skip> + 1 to <total> - <skip> 
 *
 *  Usage : Usage : filter <total> <skip>\n");
 *
 *      Input: stdin 
 *      Output: stdout
 *
 *      <total> = total number of strings to read on a line.
 *      <skip> = skip the first strings.
 *
 *  Andrew H. Fagg
 *  Center for Neural Engineering
 *  Computer Science Department
 *  University of Southern California
 *  Henry Salvatori #300
 *  Los Angeles, CA  90089-0781
 *
 *  ahfagg@pollux.usc.edu
 *
 *
 * HISTORY
 *  Date         Author               Description
 *  --------     -----------------    --------------------------------
 *  12/05/92     Andrew H. Fagg       Doc update.
 *  01/15/92     Andrew H. Fagg       Original.
 *
 */

#include <stdio.h>

main(argc, argv)

     int argc;
     char *argv[];

{
  int total;
  int skip;
  char buf[100];
  int i;

				/* Check number of args. */
  if(argc != 3)
    {
      printf("Usage : filter <total> <skip>\n");
      exit(0);
    }
  if(sscanf(argv[1], "%d", &total) != 1)
    {
      printf("Error in parsing total\n");
      exit(0);
    }
  if(sscanf(argv[2], "%d", &skip) != 1)
    {
      printf("Error in parsing skip\n");
      exit(0);
    }
				/* For each line in the file. */
  while(1)
    {				/* Skip first few strings. */
      for(i = 0; i < skip; ++i)
	{
	  if(scanf("%s", buf) != 1)
	    return(1);
	}
				/* Copy the remaining strings up to <total> */
      for(i = 0; i < total - skip; ++i)
	{
	  if(scanf("%s", buf) != 1)
	    return(1);
	  printf("%s ", buf);
	}
				/* Eat the other characters. */
      while(getchar() != '\n');
      printf("\n");
    }
}