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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LEARN ABOUT BSD

boggle

BOGGLE(6)							   Games Manual 							 BOGGLE(6)

NAME

       boggle - play the game of boggle

SYNOPSIS

       /usr/games/boggle [ + ] [ ++ ]

DESCRIPTION

       This  program  is  intended for people wishing to sharpen their skills at Boggle (TM Parker Bros.).  If you invoke the program with 4 argu-
       ments of 4 letters each, (e.g.  "boggle appl epie moth erhd") the program forms the obvious Boggle  grid  and  lists  all  the  words  from
       /usr/dict/words	found  therein.  If  you invoke the program without arguments, it will generate a board for you, let you enter words for 3
       minutes, and then tell you how well you did relative to /usr/dict/words.

       The object of Boggle is to find, within 3 minutes, as many words as possible in a 4 by 4 grid of letters. Words	may  be  formed  from  any
       sequence  of 3 or more adjacent letters in the grid. The letters may join horizontally, vertically, or diagonally.  However, no position in
       the grid may be used more than once within any one word. In competitive play amongst humans, each player is given credit for those  of  his
       words which no other player has found.

       In  interactive play, enter your words separated by spaces, tabs, or newlines. A bell will ring when there is 2:00, 1:00, 0:10, 0:02, 0:01,
       and 0:00 time left. You may complete any word started before the expiration of time. You  can  surrender  before  time  is  up  by  hitting
       'break'. While entering words, your erase character is only effective within the current word and your line kill character is ignored.

       Advanced  players  may wish to invoke the program with 1 or 2 +'s as the first argument. The first + removes the restriction that positions
       can only be used once in each word. The second + causes a position to be considered adjacent to itself as well as its (up to) 8 neighbors.

4th Berkeley Distribution					   May 20, 1985 							 BOGGLE(6)