Replacing words in a file Post: 302070711

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Top Forums Programming Replacing words in a file Post 302070711 by adam85 on Thursday 6th of April 2006 06:22:27 PM

04-06-2006

Registered User

Replacing words in a file

I'm trying to write a program that will open an existing file supplied by the command line argument and then replace words with "We" or "we" by "I" and "a" or "A" by "The". When I run the program it reads the file, changes the word but re writes it on a new line with only the replaced words not the whole sentence. Would anyone be able to help me? I also have to use open and read not fopen for example.

Code:

#include        <stdio.h>
#include	<stdlib.h>

#define BUFFERSIZE      4096

 main(int ac, char *av[])
{
        int     in_fd, n_chars;
        char    buf[BUFFERSIZE];
        char x;

        if ( ac != 2 ){
                fprintf( stderr, "usage: %s source destination\n", *av);
                exit(1);
        }
                                        

        if ( (in_fd=open(av[1], O_RDWR)) == -1 )
        	printf("Cannot open ", av[1]);


	while ( (n_chars = read(in_fd , buf, BUFFERSIZE)) > 0 ){


	for  (x=0; x<n_chars; x++)
	{


		if (buf[x] ==  'W') if (buf[x+1] == 'e') if (buf[x+2]=' ')
			{
				lseek(in_fd, 0, SEEK_CUR);
				write(in_fd, "I", strlen("I"));
			}
		if (buf[x] == 'w') if (buf[x+1] == 'e') if (buf[x+2]=' ')
			{
				lseek(in_fd, 0, SEEK_CUR);
				write(in_fd, "I", strlen("I"));
			}
		if (buf[x] == 'A') if (buf[x+1] == ' ')
			{
				lseek(in_fd, 0, SEEK_CUR);
				write(in_fd, "The", strlen("The"));
			}
		if (buf[x] == 'a') if (buf[x+2] == ' ')
			{
				lseek(in_fd, 0, SEEK_CUR);
				write(in_fd, "the", strlen("the"));
			}	
                write( in_fd, &buf[x], 1 );			
	}

	}
        if ( n_chars == -1 )
        	printf("Read error from ", av[1]);
        if ( close(in_fd) == -1)
                printf("Error closing files","");




}

adam85

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gaelic

GAELIC(5)						     Linux Programmers Manual							 GAELIC(5)

NAME

       gaelic - a list of Scots Gaelic words

DESCRIPTION

       /usr/share/dict/gaelic is an ASCII file which contains an alphabetic list of words, one per line.

FILES

       /etc/dictionaries-common/words  is  a  symbolic	link  to  a  /usr/share/dict/<language> file.  /usr/share/dict/words is a symbolic link to
       /etc/dictionaries-common/words, and is the name by which other software	should	refer  to  the	system	word  list.   See  select-default-
       wordlist(8) for more information.

       The directory /usr/share/dict can contain word lists for many languages, with name of the language in English, e.g., /usr/share/dict/french
       and /usr/share/dict/danish contain respectively lists of French and Danish words if they exist.	Such lists should be coded using  the  ISO
       8859-1 character set encoding.

SEE ALSO

       ispell(1), select-default-wordlist(8), and the Filesystem Hierarchy Standard.

HISTORY

       The words lists are not specific, and may be generated from any number of sources.

       The  system word list used to be /usr/dict/words.  For compatibility, software should check that location if /usr/share/dict/words does not
       exist.

AUTHOR

       Alastair McKinstry <mckinstry@computer.org>

Linux								   20 July 2002 							 GAELIC(5)