Login or Register to Ask a Question and Join Our Community


Programming

c file to extract real value from a txt file

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Programming c file to extract real value from a txt file
# 8  
Old 02-04-2008
Quote:
Originally Posted by user_prady
Dear Friends,

I am really in a great problem.
My problem is as follows

If I will send a counter to a function in c like read_line(counter);

Then it will read that line only which counter is pointing ,
Suppose I ve txt file like below

abc.txt
12.1
13.2
14.4

Then If I'll call the function as read_line(2);

It should read the 2nd line only and then put that value to a double pointer..

I mean one function call should read only the specified row,, and store it to a double pointer..

I need help badly..
One way you could do this is by moving the sscanf part of the code into the read_line() function. This way you just need to increment the variable by 1 after every call to fgets. After calling fgets you can invoke read_line() and pass the counter as an argument to it and inside read_line() the double floating number will be stored at the address specified by the double pointer using sscanf.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

To extract values after the maximum value in a txt file

Hello, I'm new to scripting and I need to write a bash script. Here is example of file on which I'm working: 0.3092381 0.3262799 0.3425480 0.3578379 0.3719490 0.3846908 0.3958855 0.4053738 0.4130160 0.4186991 0.4223357 ... (1 Reply)
Discussion started by: jeo_fb
1 Replies

2. Shell Programming and Scripting

Extract information from txt file

Hello! I need help :) I have a file like this: AA BC FG RF TT GH DD FF HH (a few number of rows and three columns) and I want to put the letters of each column in a variable step by step in order to give them as input in another script. So I would like to obtain: for the 1° loop:... (11 Replies)
Discussion started by: edekP
11 Replies

3. Shell Programming and Scripting

Script extract text from txt file with grep

All, I require a script that grabs some text from the gitHub API and will grep (or other function) for a string a characters that starts with (") quotes followed by two letters, may contain a pipe |, and ending with ) . What i have so far is below but it's not returning anything. ... (4 Replies)
Discussion started by: ChocoTaco
4 Replies

4. Windows & DOS: Issues & Discussions

2 Questions: replace text in txt file, add text to end of txt file

so... Lets assume I have a text file. The text file contains multiple "#" symbols. I want to replace all thos "#"s with a STRING using DOS/Batch I want to add a certain TEXT to the end of each line. How can I do this WITHOUT aid of sed, grep or anything linux related ? (1 Reply)
Discussion started by: pasc
1 Replies

5. Shell Programming and Scripting

Need to append the date | abcddate.txt to the first line of my txt file

I want to add/append the info in the following format to my.txt file. 20130702|abcd20130702.txt FN|SN|DOB I tried the below script but it throws me some exceptions. <#!/bin/sh dt = date '+%y%m%d'members; echo $dt+|+members+$dt; /usr/bin/awk -f BEGIN { FS="|"; OFS="|"; } { print... (6 Replies)
Discussion started by: harik1982
6 Replies

6. Shell Programming and Scripting

Command to extract all columns except the last few from a txt file

hello, i have publicly available txt file with little less than 300000 rows. i want to extract from column 1 to column 218 and save it in another text file. i use the cut command but the file is saved with multiple rows from the source file onto a single row in the destination. basically it is... (6 Replies)
Discussion started by: madrazzii
6 Replies

7. Shell Programming and Scripting

awk append fileA.txt to growing file B.txt

This is appending a column. My question is fairly simple. I have a program generating data in a form like so: 1 20 2 22 3 23 4 12 5 43 For ever iteration I'm generating this data. I have the basic idea with cut -f 2 fileA.txt | paste -d >> FileB.txt ???? I want FileB.txt to grow, and... (4 Replies)
Discussion started by: theawknewbie
4 Replies

8. UNIX for Dummies Questions & Answers

Extract numbers from .txt file

I need to extract all the p-value numbers and the rho numbers from a .txt file and write them as coma separated values in a new file. Ideally I would get two files in the end, one for p- values and one for rho. Any suggestions? I appreciate your help!!! The .txt file looks essentially like this... (5 Replies)
Discussion started by: eggali
5 Replies

9. Shell Programming and Scripting

Extract from txt file

I have data as follow in the txt file. I want to skip line starting with '#' sign. #command program abc defmt exp refmt ... ... I want to store abc exp .... in a array. I want to store defmt refmt in a array I need command to read each line in the file. I need... (6 Replies)
Discussion started by: ekb
6 Replies

10. UNIX for Dummies Questions & Answers

Binary txt file received when i use uuencode to send txt file as attachment

Hi, I have already read a lot of posts on sending attachments in unix...but none of them were of help for my problem...so here goes.. i wanna attach a text file and send to a mail id..used the following code : uuencode "$File1" "$File1" ;|mail -s "$Mail_sub" abc@abc.com it works... (2 Replies)
Discussion started by: ash22
2 Replies
Login or Register to Ask a Question

LEARN ABOUT DEBIAN

ost_counter

ost::Counter< T >(3)					     Library Functions Manual					      ost::Counter< T >(3)

NAME

       ost::Counter< T > -

       The counter template is used for generic objects which act as automatic counters.

SYNOPSIS

       #include <counter.h>

   Public Member Functions
       Counter ()
	   Construct and initialize a counter to zero.
       Counter (const Counter &counter)
	   Construct a counter with an initial value set for another counter.
       Counter (T initial)
	   Construct a counter with an initial value of the specified data type.
       T & operator= (T c)
       operator T ()

   Protected Attributes
       T count

Detailed Description
   template<typename T>class ost::Counter< T >
       The counter template is used for generic objects which act as automatic counters.

       Each time the object is accessed, the underlying counted data type is incremented.

       Author:
	   David Sugar dyfet@gnutelephony.org Automatic counter template class.

Constructor &; Destructor Documentation
   template<typename T > ost::Counter< T >::Counter () [inline]
       Construct and initialize a counter to zero.

       References ost::Counter< T >::count.

   template<typename T > ost::Counter< T >::Counter (const Counter< T > &counter) [inline]
       Construct a counter with an initial value set for another counter. Parameters:
	   counter to copy from.

       References ost::Counter< T >::count.

   template<typename T > ost::Counter< T >::Counter (Tinitial) [inline]
       Construct a counter with an initial value of the specified data type. Parameters:
	   initial value to set.

       References ost::Counter< T >::count.

Member Function Documentation
   template<typename T > ost::Counter< T >::operator T () [inline]
       References ost::Counter< T >::count.

   template<typename T > T& ost::Counter< T >::operator= (Tc) [inline]
Member Data Documentation
   template<typename T > T ost::Counter< T >::count [protected]
       Referenced by ost::Counter< T >::Counter(), and ost::Counter< T >::operator T().

Author
       Generated automatically by Doxygen for GNU CommonC++ from the source code.

GNU CommonC++							  Sat Jun 23 2012					      ost::Counter< T >(3)