Programming :: How To Write / Use Function

May 30, 2010

Can you offer me the code about fmod() in C. I want to know how this function work, i am very interested in it because i have no idea to implement it, i want to know... how to write the function... not 'how to use the function' can anyone post the source codes of this function here?

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Programming :: Write A Function In A Shell Script?

Sep 22, 2010

I need a help regarding writing a function in a shell, what exactly a function does!!

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Programming :: Write A Function That Shall Execute Periodic?

Sep 1, 2010

I want to write a function that shall execute periodic. means if i set time 1 sec that function should execute in each 1 sec. let us call that function func1. But i dnt want to wait inside the func1 for that 1 sec. Meanwhile i want to run another function say func2 in background . some thing like less priority function. Whnever the time come to execute the periodic function func1 it has to go to func1 and then again in the waiting time , the second function func2 will resume. I wanted to know how to do it.. Can somebody tell me is it possible using signal in linux.

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Programming :: Write A Function That Counts The Number Of Occurrences Of A Pair Of Letters In A String?

Sep 9, 2010

Some help with this problem:Code:Write a function that counts the number of occurrences of a pair of letters in a string

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Programming :: Write Some Code That Involves Creating A Function To Return A Vector Iterator?

Jan 21, 2011

I'm trying to write some code that involves creating a function to return a vector iterator.I'm not sure what is wrong.

template <typename T> class VectorTemplate


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General :: Write Script To Use Function And Still Keep Function Active?

Feb 21, 2010

the function terminates if no key is pressed for 10 consecutive seconds. I tried using the -t option as suggested in some forums, but my version of showkey doesn't have the option of changing the timeout. The options I get are:

-h --helpdisplay this help text
-a --asciidisplay the decimal/octal/hex values of the keys
-s --scancodesdisplay only the raw scan-codes
-k --keycodesdisplay only the interpreted keycodes (default).

Is it possible to write a script to use this function and still keep the function active until an interrupt is recieved?

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Programming :: How Can A Friend Function Access A Public Function From A Base Class

Nov 16, 2010

#include <iostream>
using namespace std;


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Programming :: Passing Data From Interrupt Handler Function To Tasklet Function?

May 18, 2010

I am doing some Linux kernel programming for my research project. I need to record the timestamp (by using cpuid and rdtsc) when an interrupt handler (top half) is first invoked. Due to the time critical nature of the problem itself, I have to do the timestamping inside the interrupt handler itself (the first operation when the handler is called). However, I understand that tasks that are not so time critical should be deferred to a tasklet function (bottom half) for processing because other interrupts are disabled in a (top-half) interrupt handler. I am currently out of idea on how I can pass the timestamp information that I have obtained in the interrupt handler to the corresponding tasklet function.

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Programming :: Declaring A Function In A Function - C Programming

May 24, 2010

I want to declare a function in a function, but had no success till now, see the error code below and visit the project at sourceforge


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Programming :: Bash Array Add Function Example Using Indirect Array Reference As Function Argument?

Jun 20, 2010

I looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.

local arrayname=$1


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General :: Write A Telnet Server Without Username/password Function

Sep 24, 2010

i am trying to write a telnet server without username/password function. how to implement such function? the source code from inetutils seems complicated..

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Software :: In Platform \ Use Ioctl Function To Read/write Data To Hid Device?

Jun 24, 2011

Now i have a problem.I want to used a hid usb device under linux 2.6.11.But i can't know how to used ioctl function to send and receive data to a hid device

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Programming :: Surface Fitting Using NR Function Svdfit ( ) In C Programming?

Sep 16, 2010

fit a surface i.e. W(x,y) using svdfit() provided by "Numerical Recipes in C". svdfit() is written for curve fitting and not for surface fitting.But one can use svdfit(), as claimed by authors of NR book, to do surface fitting. On page 680 of NR book, authors have given a hint on how to use svdfit() for fitting a surface. But I have not understood it.This link may be helpful (Chapter 15 th is relevant here.):[URL]This is my problem:

I have a set of 100 numbers. I want to fit a 2-Dimensional function W(x,y) to these numbers.


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General :: Write A Shell Script Instead Of Shell Function?

Apr 27, 2011

I would like know when it is necessary or advisable to write a shell script instead of shell function ?

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Programming :: Calling An Asm Function From C?

Jun 4, 2010

I have a question about calling an asm function from C....It doesn't work unless I create an asm variable to hold the value of the function in....Why?Here's the code that doesn't work...

asmfile.s - version one Code: .section .data
mydata: .ascii "this is the message!
.equ mylen, . - mydata


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Programming :: Using Backtrace() Function In C?

Jul 23, 2010

I want to use backtrace() function to debug a crash issue. I tried this sample code to see how backtrace works. backtrace() function always returns 0 with the below code. Is there any kernel configuration that needs to be set for proper working of backtrace?

#include <execinfo.h>
#include <stdio.h>
#include <stdlib.h>
/* Obtain a backtrace and print it to stdout. */
print_trace (void)


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Programming :: Accessing C Function From C++

Jul 5, 2010

i have an open source application that was developed in C++ (it uses objects and namespaces all over the place). I also have another application that was developed in C. Now i am trying to insert the code made in C into C++ application, but when i do that , i get this error on compilation of the source code:

error: 'mpi_init_vars' was not declared in this scope the function mpi_init_vars() is not part of object oriented programming and it doesn't belong to any scope, it was compiled into an object file and i am linking it with all objects of C++ application.

How can invoke the C function from C++ object oriented code?

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Programming :: Bash Function Using If / Then And Else

May 2, 2011

I am trying to build a function inside a script.

#System commands and other configurable.
INT_NET= .....

I can find lots of tutorials in how to use if, then, else. However, how do I define a variable inside the function?
for c in $ISO
Also, am I using the 'test' command correctly( -/+ week as valid test)?

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Programming :: Calling C Function In Php?

Feb 7, 2011

I am doing a web site program and what I need is to call a C program in the PHP cloud.Do u think it would be possible? The web site would get the user input from PHP UI and pass to the C program , the C program would process the function with the user input and output the a PHP page.

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Programming :: C++/c Function Is Uable To Know Its Name?

Jan 4, 2011

I ask if a c++/c function is able to know its name from inside itself:


int funct1(int a,b)
printf("%s ",funct_name());
or with a trick.

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Programming :: Run 'time' On A Function?

May 30, 2010

diskfillerfunction () {


Test 15: fill up partition /usr/bin/time: cannot run diskfillerfunction: No such file or directory

I am obviously omitting (...) a lot of the code, but the relevant part is all there. How do I 'time' a function?

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Programming :: Run Function In Background?

Mar 26, 2010

I wrote a spinner in Perl and when I did a spinner in shell I could just run the subroutine in the background.


In Perl, how do you run a function in a background and get the PID for that? I know PID in Perl is $$

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Programming :: Regarding Sleep() Function In C?

Mar 25, 2011

I know what is the functionality of the sleep() method.

for(i = 0; i < length; i++){
", message[i]);

Result :every print of the message will be takes 1000sec of gap but i want to know why wee need to use the Sleep function. where exactly it is useful

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Programming :: Return Value From A Function?

Nov 15, 2010

On this link [URL]4 a return type is defined

return ((unsigned int)(unsigned long)base & TBASE_DEFERRABLE_FLAG);
What is the above function returning.I am not clear with definition of what is being returned in the above code.

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Programming :: Use Function C In Java?

Apr 8, 2010

i want to compile function c in java and compile library is success.. when i call the library in java and error is :

Exception in thread "main" java.lang.UnsatisfiedLinkError: no in java.library.path
at java.lang.ClassLoader.loadLibrary(
at java.lang.Runtime.loadLibrary0(
at java.lang.System.loadLibrary(


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Programming :: Use Pipe In Excel Function?

Apr 13, 2010

In shell, I execute "./ffmpeg -f h264 - | xxx"

Now I hope use execl function to execute above operations,

I call execl("/bin/sh", "sh", "-c", "./ffmpeg -f h264 - | xxx");

but ffmpeg doesn't work, it seems that "|" pipe don't work.

how could I solve this?

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Programming :: Remote Function With Pthread?

May 22, 2010

I wrote some code in c, using pthread (I configured the linker and compiler in eclipse IDE first).

Code: #include <pthread.h>
#include "starter.h"
#include "UI.h"
Page* MM;


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Programming :: .bashrc Function Tab Completion?

Jul 5, 2010

I tried to make a (very simple) function to put in my .bashrc file to make a local backup of a file, but when I call the function and try to use tab completion I get the following error: Code: cp: cannot stat `help': No such file or directory The function I added is as follows:

Code: function bk
cp -f --backup=numbered ${1} ${1}.bak


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Programming :: Get Function's Prototype From Elf File?

Oct 18, 2010

I've an ELF file (exec)...I'm interested in getting a the function prototype of the "myfunc"...

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Programming :: Gc-sections Remove All Function Not Used?

Nov 18, 2010

This is my file, named xxx.c. And there are two functions in it.


When I try to compile the whole project, I used -ffunction-sections,-fdata-sections to generate the .o files, use Wl,--gc-sections -Wl,--print-gc-sections to link to the exacutable file. gcc 4.3.2 ld 2.18 Debian 5 After the first time I compiled it, I got a list of Removed functions. But one second later, I rememberd that I forget to close the Compile Switch: Debug. Then I had to recompile it and got another list. Compare these two lists, I found that , bxx isn't on the second list. First I guess that bxx is a debug function but never used in debug mode, and it won't be compiled in release mode. I check the source and find that there was no compile switch for bxx. But it's caller function axx, is removed, both the debug switch is on and off. I try to compiled the project for several times , but the result is the same. I can't realized it , why? Is that the --gc-sections won't remove all the functions not used?

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