Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

Help for my first program, first post!

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Help for my first program, first post!
# 1  
Old 03-23-2006
Power Help for my first program, first post!
Hi guys (and girls!),

Need some help for my program (C IN UNIX Environment)

Basically I want to have a C program which, for an existing file supplied by the command line argument (E.g. File1.txt) replaces all the occurrences of the words “We” or “we” by “I”; “a” by “the”; and “A”
by “The”. Then print the replaced file. All other characters of the file are to be left unchanged.

I know basically to change a string of characters you use:
String.Replace("oldval","newval");

How would you go about doing this to an entire txt file???

I was told by more experienced ppl I may have to use read, write, open, lseek commands.

Sorry for those of you who think this is ezy, just learning and any help is great!!

Thanks....
 
Login or Register to Ask a Question

Previous Thread | Next Thread

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl program get a response before the program quits

I created a program, so a kid can practice there math on it. It dispenses varies math problems and the kid must input an answer. I also want it to grade the work they have done, but I can't find the best place for it to print out the grade. I have: if ( $response =~ m/^/ ) { $user_wants_to_quit... (1 Reply)
Discussion started by: germany1517
1 Replies

2. Post Here to Contact Site Administrators and Moderators

Help with deleting post, apologies about the earlier post.

Apologies about the earlier post, i didnt realise, could i delete that post? I apologise again, SynGc (1 Reply)
Discussion started by: SynGc
1 Replies

3. Homework & Coursework Questions

Calling compiled C program with Perl program

Long story short: I'm working inside of a Unix SSH under a bash shell. I have to code a C program that generates a random number. Then I have to call the compiled C program with a Perl program to run the C program 20 times and put all the generated random #s into a text file, then print that text... (1 Reply)
Discussion started by: jdkirby
1 Replies

4. Programming

Python program faster than C++ program.

I wrote a simple program that generates a random word 10,000,000 times. I wrote it in python, then in C++ and compared the two completion times. The python script was faster! Is that normal? Why would the python script be faster? I was under the impression that C++ was faster. What are some of... (2 Replies)
Discussion started by: cbreiny
2 Replies

5. UNIX for Dummies Questions & Answers

Script to open program and send/execute command in program

Hi, i want to write a script that executes a program (exec?) . this program then requires a filename as input. how do i give it this input in the script so the program will be complete run and close by the script. e.g. exec prog.exe program then asks for filename "enter filename:"... (1 Reply)
Discussion started by: tuathan
1 Replies

6. Programming

A program to trace execution of another program

Hi, I wanted to know if i can write a program using switches and signals, etc to trace execution of other unix program which calls c program internally. If yes how? If not with signals and switches then are there any other methods apart from debugging with gdb/dbx. (3 Replies)
Discussion started by: jiten_hegde
3 Replies

7. UNIX for Dummies Questions & Answers

How to write to stdin of another program (program A -> [stdin]program B)

Hi, Program A: uses pipe() I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using: * child -> dup2(fd, STDOUT_FILENO); -> execl("/path/PROGRAM B", "PROGRAM B", NULL); * parent -> char line; -> read(fd, line, 100); Question: ---------... (3 Replies)
Discussion started by: vvaidyan
3 Replies

8. Programming

How to write to stdin of another program (program A -> [stdin]program B)

Hi, Program A: uses pipe() I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using: * child -> dup2(fd, STDOUT_FILENO); -> execl("/path/PROGRAM B", "PROGRAM B", NULL); * parent -> char line; -> read(fd, line, 100); Question: ---------... (1 Reply)
Discussion started by: vvaidyan
1 Replies
Login or Register to Ask a Question

LEARN ABOUT REDHAT

mac2unix

dos2unix(1)						      General Commands Manual						       dos2unix(1)

NAME

       dos2unix - DOS/MAC to UNIX text file format converter

SYNOPSYS

       dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

       [-hkqV] [--help] [--keepdate] [--quiet] [--version]

DESCRIPTION

       This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format.

OPTIONS

       The following options are available:

       -h --help
	      Print online help.

       -k --keepdate
	      Keep the date stamp of output file same as input file.

       -q --quiet
	      Quiet mode. Suppress all warning and messages.

       -V --version
	      Prints version information.

       -c --convmode convmode
	      Sets conversion mode. Simulates dos2unix under SunOS.

       -o --oldfile file ...
	      Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.

       -n --newfile infile outfile ...
	      New  file  mode.	Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
	      used or you WILL lost your files.

EXAMPLES

       Get input from stdin and write output to stdout.

	      dos2unix

       Convert and replace a.txt. Convert and replace b.txt.

	      dos2unix a.txt b.txt

	      dos2unix -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.  Convert	c.txt  from  Mac  to  Unix
       ascii format.

	      dos2unix a.txt -c iso b.txt

	      dos2unix -c ascii a.txt -c iso b.txt

	      dos2unix -c mac a.txt b.txt

       Convert and replace a.txt while keeping original date stamp.

	      dos2unix -k a.txt

	      dos2unix -k -o a.txt

       Convert a.txt and write to e.txt.

	      dos2unix -n a.txt e.txt

       Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.

	      dos2unix -k -n a.txt e.txt

       Convert and replace a.txt. Convert b.txt and write to e.txt.

	      dos2unix a.txt -n b.txt e.txt

	      dos2unix -o a.txt -n b.txt e.txt

       Convert c.txt and write to e.txt. Convert and replace a.txt.  Convert and replace b.txt. Convert d.txt and write to f.txt.

	      dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt

DIAGNOSTICS

BUGS

       The program does not work properly under MSDOS in stdio processing mode.  If you know why is that so, please tell me.

AUTHORS

       Benjamin Lin - <blin@socs.uts.edu.au>

       Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org>

MISCELLANY

       Tested environment:

	      Linux 1.2.0 with GNU C 2.5.8

	      SunOS 4.1.3 with GNU C 2.6.3

	      MS-DOS 6.20 with Borland C++ 4.02

       Suggestions and bug reports are welcome.

SEE ALSO

       unix2dos(1) mac2unix(1)

1995.03.31							   dos2unix v3.0						       dos2unix(1)