Programming :: Why The Use Of File Type Is Said Undeclared
Aug 29, 2010
i m doing a program to open a file, however, there is error saying that 'File' undeclared. but I thought File is a type like int or char, isnt it? below is my codes:
Code:
#include "mpi.h"
#include <stdio.h>
#include <math.h>
[code]...
i have been make the statement with error in red color.
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Jul 8, 2010
i have to find time in nanosecond of a particular process and for that i am using clock_gettime() function.i tried different codes i got from net but getting same error Quote:error: �CLOCK_PROCESS_CPUTIME_ID� undeclared (first use in this function)i have included relavent header file of time also. and complied the whole code that i got from net. that was working fine and giving output. but when i use some of the relavent code that i need it gives me this error. plz tell me am i missing something aur using the code in a wrong way?heres my code!
Code:
#include <stdlib.h>
#include <sys/sysinfo.h>
[code]....
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Apr 20, 2010
I'm learning how to program kernel drivers, and I'm making a hello world module for that. But I can't find the cause of some errors... My module as three files:
test_regulator.c: Code: /*test_regulator.c
2 */
3 #include <linux/test_regulator.h>
4 #include <linux/module.h>
5 #include <linux/kernel.h>
6 #include <linux/regulator/driver.h>
code....
I don't understand, because I had declared the test_regulator_driver.
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Nov 18, 2010
I tried to load a simple driver program. I am using RHEL5. When I tried to compile my 'driver.c' program it shows the following error:
[root@jameslee ~]# gcc -c device.c
device.c:1:25: error: linux/module.h: No such file or directory
device.c: In function 'init_module':
device.c:6: error: 'KERN_INFO' undeclared (first use in this function)
device.c:6: error: (Each undeclared identifier is reported only once
device.c:6: error: for each function it appears in.)
device.c:6: error: expected ')' before string constant
device.c: In function 'cleanup_module':
device.c:12: error: 'KERN_INFO' undeclared (first use in this function)
device.c:12: error: expected ')' before string constant
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Jan 26, 2010
I'm trying to compile a program and it gives me the following:
I checked cmath-util.h:46 and cmath-util.h:48:
I'm not a C person, and the author is unavailable so far.
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Feb 4, 2011
In my system around 73gb(pc-desktop) i have,1 primary partition(windows)-25gb, 1-extended partition(remaining gb) 3 logical partitions were there in (under) extended partition in one of the logical partition is d:drive. in my hard disk d: drive is -/dev/sda5
previosly i was fat -file system , (d:drive-/dev/sda5), i remember i changed the d: drive(d:drive-/dev/sda5) file system to ext4file system ,with following command using terminal
After doing(changing the file system)this one ,i couldnt see the d:drive data
By doing that
1q) Did i reformatted the partition? i think the new filesystem(ext4) has no knowledge of the data that was on it when it had a FAT filesystem.
2q) How to do undo operation,i tried to change the filesystem type to fat/ntfs in terminal using command --sudo mkfs -t FAT /dev/sda5.
Result:its showing text message-'mkfs.FAT: No such file or directory'(not in single quote)
I had very imp data in d:drive
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Jun 9, 2010
i have written file transfer program using libcurl.
#include <stdio.h>
#include <curl/curl.h>
#include <curl/types.h>
[code]....
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May 24, 2011
I am copying the file form one directory to another directory using shellscript.
Here i want to get the Mimetype/Content-type of the file.
How to i can get the MimeType.
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Jan 10, 2010
I have a program with a variable named current, but it is not declared. The syntax is current -> othervariable. Theoreticaly there should be no problem with this program. Just wondering what woudl cause this? Which linux include file is current supposed to be declared in?
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Mar 4, 2011
I am trying to generic way to convert the string datatype to other primitive data type. To achieve, i used Template . But i getting error and couldn't resolve the issue and error reported is also clueless.
Code
====
#include <vector>
#include <iostream>
#include <string>
[Code].....
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Mar 15, 2010
I'm new to Ubuntu . With windows when you install a app it creates a folder in the drive:c under programs : Where is the install folder on Ubuntu ? AND ' with windows ' there is an exe file ' what type of file is like the exe file''' to run ? or the path to run the app ?
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Oct 14, 2010
I am writting a script to allow uploading of certain files. I want to limit the files by their filename and mime type, and by making sure the two match up.The first thing I need to do is make sure I've got all the mime types I need added. I have never done this before, but I understand that 'file' (which is what PHP's mime-type finding is based off of) uses magic databases that tell at which point in the file should have signatures of the filetype.
My trouble started when I was unable to determine the filetype of any of my video files. Currently, I have some .MOV and .MP4 files that I am using to test.
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Jan 24, 2011
I want to be able to play a video file on my pda(Tungsten T5) but from memory the only video file i have seen playable on it was the asf file that is used when it starts up/reboots. I tried other file types in the past that were suggested in maybe a manual or forum or something but they never worked/played. I think it is because of the player installed and i tried installing another player but from memory that didn't install properly or just did not play anything. So if anyone knows of a way to convert files maybe using winff or mencoder i would love that info. I have been googling and have found nothing specific to what i am asking. I do not see anything in winff to convert to asf and cannot remember ever using mencoder.
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Oct 27, 2010
i'm trying to install php zip extension through pecl, issuing the following command pecl install zip but i'm getting the following error:
[code]...
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May 19, 2010
I hope to get your suggestions to solve my problem. I install Ubuntu8.10 in my notebook last week.I should install drcom-1.4.7 to get through to the internet,while i tried many times but failed like this:
make[1]: Leaving directory `/home/lf/drcom-1.4.7/drcomd'
make[1]: Entering directory `/home/lf/drcom-1.4.7/kmod'
make -C /lib/modules/2.6.27-7-generic/build M=/home/lf/drcom-1.4.7/kmod modules
make[2]: Entering directory `/usr/src/linux-headers-2.6.27-7-generic'
[code]....
kernel cannot support the drcom version.so i tried to install drcom-1.4.4,but problem also occured:
readconf.c: In function __parseopt:
readconf.c:489: error: LONG_MIN undeclared (first use in this function)
readconf.c:489: error: (Each undeclared identifier is reported only once
readconf.c:489: error: for each function it appears in.)
[code]...
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Jul 1, 2010
In C++ what does the suffix, "*" mean appended to a variable type, e.g., "char* variable1;"?
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Nov 29, 2010
I have included fstream in my file (#include <fstream>) In the file, I have a class declaration and a private variable static fstream fileStopWatch; Then I am getting the error "'fstream' does not name a type" It was working in gcc version 4.1.2 20080704 (Red Hat 4.1.2-48) but not working in gcc version 4.4.4 (GCC)
[Code].....
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Jun 8, 2011
I have installed php-devel successfully prior to go with the installation (yum install php-devel). Here is what I did;
1.wget "url
2.tar xjvf ffmpeg-php-0.6.0.tbz2
3.cd ffmpeg-php-0.6.0
4.phpize
5../configure
6.make
7.make install
code....
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Jun 14, 2010
I declared a variable as int data type which was a placeholder for a resulttatus (meaning, based on the result status that variable varies from 0/1/2/3. It can contain only these four values).data type is 4 byte integer in C#. But I can declare this variable as which represents a 1 byte integer. Since that variable contains only 1 or 2 or 3 or 4, declaring the variable asis wastage of memory space.Before declaring any variable we need to just think of the memory space needed for that variable, our requirement,
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Jun 26, 2010
I'm quite new to c++ programming, so my concepts are not so increased yet...
I wanna to create a list to store my objects. I'll resume them here:
Code:
private:
And what I want to do is an event list:
Code:
Sometimes this works and sometimes I got "segmentation fault".
I think I'm doing it wrong, cause these objects have different sizes, so I don't know if I could have all of them in a single array.
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Jun 13, 2011
I have a C header file which have arrays of predefined(known) structure type. But i dont have names of arrays and their size. when i include that file and compile my application, i want to know the names and sizesof those arrays.
purpose of application is to get the content of those arrays and to explain it in descriptive words instead of hex numbers.ofcourse this can be done by file pointers and reading also with out header file inclusion, but as i am working in C, once compiled, those variables are in my address space in i include header file.
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Oct 27, 2010
I got some error in make
Code:
bash-4.1# ./configure
checking for a BSD-compatible install... /bin/ginstall -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
[code]....
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Dec 13, 2013
I am trying to learn how to use true type fonts in SDL using libsdl-ttf. I am trying to use the font "FreeSans.ttf" but my program prints out the message "Couldn't open FreeSans.ttf." Any way to get a list of what fonts true type fonts exist using C++ and SDL?
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May 15, 2011
ubuntu terminal mingling made me want to learn programming, i started with python, using idle workspace (is this the right term?)i got to the stage when i need and want to use SPE workspace.i have downloaded it, but can't type in it - when i type, nothing happens at all.where have i been wrong please ?
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Nov 23, 2010
in c/c++, double is usually 8 bytes. It has a 52-bit mantissa (or significand, or base), an 11-bit exponent, and a 1-bit sign. My question is: is the mantissa a 52-bit integer? Or is the decimal point just after the first bit. Meaning: if the mantissa was 1000110011100011 (in binary) would that make the value of the mantissa (assuming the exponent was 0) 1000110011100011, or 1.000110011100011? (in binary)
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Jan 6, 2011
I am fairly new to c++. There must be a better way to do the following?:- Say I have a base class, Pet. I have several child classes that extend from this, like Dog, Cat, Fish etc.
I have the following function, that returns a pointer to a new Pet:-
Code: Pet* addPetToVet()
{ //Do some stuff
return new Pet();
} This will return a pointer an instance of a pet object.
Now, if I want to interpret this pet as a dog or cat I have to do this:-
Code: Dog* dogA = static_cast<Dog*>(addPetToVet());
Cat* catA = static_cast<Cat*>(addPetToVet()); Is there a way around this? Casting seems lame. I cant write a function for each type of pet.
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Mar 25, 2010
I'm a C / assembler programmer so am not use to C++, which I need to use. Basically I'm using my own versions of memcpy, but for long and int rather than char. It's for fast graphics. So I have a char array which I copy to another array. But I copy as either longs or ints, much faster. for example
Code:
void * fastmemcpysprite (void *destaddr, void const *srcaddr, size_t len)
{
[code]...
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Apr 14, 2011
I need a data type to hold TetraByte.Even I want to know details of int64, long, unsigned long long, and how they differ from each other.
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May 25, 2010
I'm sure this has been covered somewhere before, but I couldn't find anything and so figured I would post here. I have been using Linux OSes for the past couple of years and also using GCC/G++ for application development. However, I have almost always been on x86 systems and never gained much experience using the wide range of optimization options available.
My question is, if I do not specify the -march=PROCTYPE option, will GCC still be able to detect the current architecture and build the code accordingly? I primarily ask this because I am working with an x86_64 system, and specifying -march=x86_64 in my makefiles generates errors about it being an unknown processor type, even though the CPU and OS are X86_64. I know this sounds like a newbie question, but it's just ground I've never had to cover before until now.
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Feb 10, 2010
I need to launch programs in my program and the program can be a script, a Linux executable or even a Windows executable. The first thing i tried is to use xdg-open from my program, but i can't pass arguments to it, otherwise it would have worked perfectly. Is there maybe a way to determine which program is set as default according to the mime-type of the program i want to launch? I also tried kfmclient and gnome-open, they don't allow arguments either.
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