/*  reverse.c  --  reverse a single line  */

#include <stdlib.h>
#include "ios.h"   /* using the input/output service module  */

#define MAX_LENGTH 120
#define ERR_LINE_SIZE 1

static char  Buffer [MAX_LENGTH];

void  main ( int argc,  char * argv [] )
{   int k, n;
    char * from;
    FILE * outfile;
 if ( argc < 3 )  err_command_line ( "reverse infile outfile" );
 open_input_file ( argv [1] );
 n = get_line_sure ( & from );
 if ( n > MAX_LENGTH ) {
   printf ( "line length %d exceeds the maximum %d\n",
     n,MAX_LENGTH );
   exit ( ERR_LINE_SIZE );
 }
 for ( k=0; k<n; k++ )  Buffer [n-1-k] = from [k];
 Buffer [n] = 0;
 if ( get_line ( & from ) >= 0 )
   printf ( "warning: only the first input line is processed\n" );
 outfile = open_output_file ( argv [2] );
 fprintf ( outfile, "[%s]\n", Buffer );
 exit (0);
}

/*  end of  reverse.c  */