Ad:

C Discussion Thread
Unsolved
Views: 1880

Apr 7th, 2007

I/o C

Expand Post »

Hey guyz, I'm stuck with this given, its bit hard I cant understand it just wonna know the logic ( no codes).

Its saying write a C program which read from standard input, replaces all the occurrences of the characters by the first command line argument, with the corresponding characters supplied by the second command line argument, and writes the output to a file supplied by the 3rd command line argument, then print out the file.
NB:
1- you should attempt to read in blocks of charz, change these blocks and write them to file rather than read on char at a time
2- if the 1st number of characters in the first argument are different then the number of chars in the second argument, its up to you how to handle this situation.

rowly

Reputation Points: 10

Solved Threads: 3

Junior Poster in Training

Offline

65 posts
since Sep 2006

Permalink

Apr 7th, 2007

Re: I/o C

Say for example your program name is replace.exe. Then you call that program with three command line options.
Example.

replace.exe abc def outputfile.txt

Then the program will read user input line by line and write the output to outputfile.txt.

e.g

(Toggle Plain Text)

           input                           output
            abab                            dede
            a                               d
            abracadabra                     derdfddderd

I think the NB part is simple to understand. If you dont please say.

WolfPack

Moderator

Reputation Points: 572

Solved Threads: 115

Mentally Challenged Mod.

Offline

1,559 posts
since Jun 2005

Permalink

Apr 7th, 2007

Re: I/o C

Click to Expand / Collapse Quote originally posted by WolfPack ...

Say for example your program name is replace.exe. Then you call that program with three command line options.
Example.

replace.exe abc def outputfile.txt

Then the program will read user input line by line and write the output to outputfile.txt.

e.g
(Toggle Plain Text)
           input                        output
            abab                            dede
            a                               d
            abracadabra                     derdfddderd
input output abab dede a d abracadabra derdfddderd
I think the NB part is simple to understand. If you dont please say.

umm beauty ! it easy now

and the ouptputfile.txt should contain only derdfddderd which the last output isn't ?!
1 more question is it right to read from buffer straight away?
for example
buff[200]
buff will constain the abab so i'll read the buffer and replace the characters with the second characters

Last edited by rowly; Apr 7th, 2007 at 12:55 pm.

rowly

Reputation Points: 10

Solved Threads: 3

Junior Poster in Training

Offline

65 posts
since Sep 2006

Permalink

Apr 7th, 2007

Re: I/o C

Click to Expand / Collapse Quote originally posted by rowly ...

ouptputfile.txt should contain only derdfddderd which the last output isn't ?!

It should contain all the outputs for all the inputs the user enters.

C Syntax (Toggle Plain Text)

dede
d
derdfddderd

Click to Expand / Collapse Quote originally posted by rowly ...

1 more question is it right to read from buffer straight away?
for example
buff[200]
buff will constain the abab so i'll read the buffer and replace the characters with the second characters

If the output is correct, it doesnt matter how you do it.

WolfPack

Moderator

Reputation Points: 572

Solved Threads: 115

Mentally Challenged Mod.

Offline

1,559 posts
since Jun 2005

Permalink

Apr 7th, 2007

Re: I/o C

aha
ok zn i'll start with coding...
thx alote mate

rowly

Reputation Points: 10

Solved Threads: 3

Junior Poster in Training

Offline

65 posts
since Sep 2006

Permalink

Apr 10th, 2007

Re: I/o C

alright guyz is that the right logic ?!

(Toggle Plain Text)

replace.exe abc def outputfile.txt

e.g

           input                        output            abab                            dede            a                               d            abracadabra                     derdfddderd
create char **temp1[1024]
then copy argv1[i] to temp1[i] so 
argv[0] = replace.exe and temp[0]= replace.exe 
argv[1]=abc  and temp1[1]=abc
argv[2]=def   and temp1[2]=def 
and zn copy temp1[i+1] to argv[i]
is this the right logic to replace them !?

rowly

Reputation Points: 10

Solved Threads: 3

Junior Poster in Training

Offline

65 posts
since Sep 2006

Permalink

Apr 10th, 2007

Re: I/o C

hello guyz, is there any user input i mean like is there fgets ?!
because ./a.out abc def blabla
please enter character : jdk
bef
... ?! is this how it should go ?!

rowly

Reputation Points: 10

Solved Threads: 3

Junior Poster in Training

Offline

65 posts
since Sep 2006

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in C Forum Timeline: i need to know

Next Thread in C Forum Timeline: Verify A value

DaniWeb Message

Cancel Changes

User Name
Password