Programming :: Get "data Type" Of An "unknown Variable" In "C Language"?

Jun 13, 2009

I am going to write a function which will do different operation base on the data type of the input parameter.

I am using C (Pure C, not C++).

The problem is that I do not know how to get the data type of the input parameter in C Language.

Can anyone tell me how to do this.

View 8 Replies


ADVERTISEMENT

Programming :: Convert The String Data Type To Other Primitive Data Type?

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].....

View 7 Replies View Related

Programming :: C++ Variable Type Followed By *?

Jul 1, 2010

In C++ what does the suffix, "*" mean appended to a variable type, e.g., "char* variable1;"?

View 3 Replies View Related

Programming :: Difference Between Scope,linkage And Life Of A Variable In C Language?

Mar 4, 2011

As i went through some tutorials found no difference in their meaning .. explain the difference in usage.

View 5 Replies View Related

Programming :: Variable `GPIO_LED_ctl_ops' Has Initializer But Incomplete Type?

Sep 16, 2010

when i compile the device driver of led ,i get the erro like this:

[root@localhost led]# arm-linux-gcc -D__KERNEL__ -DMODULE -I /home/liumeng/lmldd
/linux-2.6.34.1/ -c -O -Wall led.c -o led.o
led.c:34: error: variable `GPIO_LED_ctl_ops' has initializer but incomplete type

[code]....

View 1 Replies View Related

Programming :: Book Example Of Own Type Variable Initialization Wont Work?

Nov 8, 2010

Its an example froom a book... and it does not work...

Code:
#include <stdio.h>
int main ( int argc, const char * argv[] ) {

[code]....

View 4 Replies View Related

Programming :: C Language Data Structure/ Algorithm Info Requested

Apr 2, 2010

Does anyone know of a C Language Data Structure Tutorial? I have not been able to find anything much to speak of myself.

View 4 Replies View Related

Ubuntu :: Error: Can't Perform Indexing Operations For <unknown Type> Type

Feb 26, 2010

I just loaded octave. I ran through a few examples of how to implement a script file. Everything works until I get to "plot". When I run the "plot" command I get the following.

octave:2> test1.m
error: can't perform indexing operations for <unknown type> type
sh: gnuplot: not found
Just to double check my work, I ran the following code:
y=[1 2 3];
plot(y);

View 3 Replies View Related

General :: Data Type In Programming?

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,

View 6 Replies View Related

Programming :: Read Unknown Data Length From Usb Pipe?

Aug 12, 2010

I've written a usb device driver and a program that sends and receives data over the bulk pipe. The read function sometimes returnsI'm reading an unknown amount of data. However, using a usb tracker I can see that the correct data is being sent.The error only occurs sometimes.I expect that the read function is told to read more data that it receives it would fail and return -1, however if this was the case then every read call would fail.

View 4 Replies View Related

Programming :: Double Data Type Mantissa?

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)

View 1 Replies View Related

Programming :: Data Type In C To Hold TetraByte?

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.

View 14 Replies View Related

Programming :: How To Printf Long Data Type

Jun 7, 2010

misunderstood structure definition at the beginning

View 3 Replies View Related

Programming :: Have Files With Rows Of Data And Need To Check If The Next Row Of The Same Type?

Aug 16, 2010

I have a problem - I have files with rows of data and I need to check if the next row (of the same type) has the NEXT date in it so I need to extract a date in YYYYMMDD format from a row (easy enough) then add one day to it and compare it to the the next date I encounter on a subsequent row.

So if I have
DATE|20100530
VAL|kahskjhd

[code]...

View 6 Replies View Related

Programming :: Print, Store Or Compare An S8 Data Type?

Feb 15, 2011

I'm working with Radiotap headers right now. I want to get the RSSI data. I came through a problem that I can't figure out right now.The value that I need to get is:

Code:
s8 IEEE80211_RADIOTAP_DBM_ANTSIGNAL
now, when I printf it:

[code]...

View 4 Replies View Related

Programming :: Convert A Dictionary Data-type To A String?

Mar 17, 2011

how to convert a dictionary data-type to a string?

actually I am trying to update some json file 's dictionary.

View 1 Replies View Related

Programming :: Checking Shell Script Variable Contain Numeric Data

Mar 28, 2009

I need to check whether a shell script variable contains non-zero numeric data to proceed. The variable should contain numeric values, but may in fact contain zeroes, blank space or nothing. So far, I have tried various combinations of:

Code:
if test $variable
then
if test $variable -gt 0
then
echo "good data exists"
else "no good data exists"
fi
fi
It partially works, but I get either "too many arguments" or "integer expression expected".

View 2 Replies View Related

Ubuntu :: Changing File System Type To Another Filesystem Type - Does It Effect On Data?

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

View 1 Replies View Related

Red Hat :: DNS Error In RHEL 5.1 - Unknown RR Type

Jul 15, 2010

I am doing the DNS configuration for the first time. Error in named configuration:

zone localdomain/IN: loaded serial 42
zone localhost/IN: loaded serial 42
zone 0.0.127.in-addr.arpa/IN: loaded serial 1997022700
file1:9: unknown RR type 'example.com.'
file1:11: unknown RR type 'red.exmple.com.'
zone example.com/IN: loading master file file1: unknown class/type
[Code]....

View 1 Replies View Related

Slackware :: Tcsh - Unknown Colorls Variable 'ca'

Jul 27, 2010

I have been using tcsh for quite some time, both on a laptop running Ubuntu and a remote server running Slackware 11. No problem whatsoever. Now I am compiling and installing tcsh on a brand new Slackware 13 box and when I run tcsh I get this error:

Unknown colorls variable 'ca'

or

Unknown colorls variable 'hl'

I didn't have this problem in Slackware 11, why is it happening now?

So I tried the official Slackware package for tcsh. It works, but it's tcsh 6.15.00. Tcsh is at 6.17.00, which runs fine on my Slackware 11 box.

I investigated the problem on Google and all reports seem to refer to Fedora, some to Mandriva. Many of the threads, across several forums and sites, point to this LinuxQuestions thread:

[URL]

View 2 Replies View Related

Programming :: Bash - Read Content Of File To Variable And Use This Variable In For Loop ?

Aug 21, 2009

I'm trying to read content of file to variable and use this variable in for loop. The problem is, when I have c++ comment style in file - /*. Spaces in line are also interpreted as separated lines.

For example:

Code:

Changing $files to "$files" eliminate these problems but causes that whole content of variable is treated as one string (one execution of loop).

View 6 Replies View Related

Programming :: Make A New Variable With The String From The Old Variable Btut Without Any Plus Sign?

Apr 7, 2010

my script has a variable which comes in the form +00.00 +0.00 -00.00 or -0.00 (the numbers can be any in that form) for any that have a + symbol I need to remove the +, but if it has a - symbol it needs to stay.

i need to make a new variable with the string from the old variable btut without any plus sign. I have tried a lot of different ways with no success, each thing I tried either left the + or removed the entire string. I think this should work but doesn't

foo=+12.40
bar=${foo#+}

View 4 Replies View Related

Programming :: Search Within A Variable And Assign The Results To A New Variable?

Apr 25, 2011

how I can search within a variable and assign the results to a new variable. I'll use the following as an example -

cars="Audi BMW Cadillac Chevy Dodge Ferrari Ford Mercedes"
list=`echo ${cars} | egrep -o '<A?+|<C+'`

with the echo command I get the following output assigned to list -

A
C
C

What I'd like to get for output is -

Audi
Cadillac
Chevy

how I could do this regardless of upper/lower case letters?

View 5 Replies View Related

Debian :: 'rxvt-256color': Unknown Terminal Type

Apr 29, 2011

Lately, my rxvt-unicode has been generating this ~$ top 'rxvt-256color': unknown terminal type. Many of the terms have a colour patch. Where is the one for rxvt? Is there one in Debian or do I have to get creative?

View 2 Replies View Related

Debian Installation :: Mount -unknown Filesystem Type 'xfs'

Aug 26, 2011

I recently upgrade my armel NAS from etch to squeeze. During the partitioning step of the installation I intentionally left unmounted the data partition (900GB formatted XFS) but after the installation I'm not able to mount it.

I edited the fstab file adding the last line

And tried a mount but I get the message

So i noticed throught lsmod that I don't have the module for xfs

Tried installing xfsprogs but it didn't helped. So I searched for xfs-modules but seems it doesn't exists for armel architecture. Am I right? What does it means? That XFS is not supported in armel Squeeze? Assumed I can't transfer/backup 900GB of partition, is there a way to convert it on-the-fly to a supported filesystem format?

View 8 Replies View Related

Ubuntu :: Server Not Booting - Unknown Filesystem Type

Jan 28, 2011

I changed the first line of /etc/fstab in an attempt to get rid of an annoying message "mount: unknown filesystem type 'static'". All I did was put a "#" on the first line .... changing the original from:

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
to:
#
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>

I have tried desperately to get to the file system so that I can edit that first line in fstab out but nothing works and the file system comes up as read only ...

View 7 Replies View Related

General :: Mount: Unknown Filesystem Type 'ntfs'

Jul 7, 2010

I dont know anything about linux and just been assigned to amount a drive to it. here's what i did so far: Version of Linux using Red Hat Enterprise Linux Server release 5.3 (Tikanga) [root]# mount -t auto /dev/sdb1 /tmp/archive mount: unknown filesystem type 'ntfs'

when checking the /proc/filesystems, i noticed that 'ntfs' is not listed there, several forum suggested i try running 'modprobe ntfs'. If that is not found, you'll need a kernel with ntfs support. i'm so lost, where to i get the modprobe ntfs

View 2 Replies View Related

Ubuntu Servers :: Mysqld.pid File Error On 8.04.4 LTS - Unknown Variable

Feb 4, 2010

I'm running Ubuntu 8.04.4 LTS to host a moodle server in a school.. moodle is running OK - but I'm having problems with MySql Any mysql command generates:

unknown variable 'pid-file=/var/run/mysqld/mysqld.pid'

I've taken a look in unknown variable 'pid-file=/var/run/mysqld/ and there is no mysqld.pid file I have followed these instructions that I found elsewhere:

If there�s no mysqld.pid inside /var/run/mysqld directory, create mysqld.pid
# cd /var/run/mysqld
# touch mysqld.pid

[code]....

But after reboot the mysqld.pid file is missing again.. I can access mysql via phpmyadmin - but webmin fails with unknown variable 'pid-file=/var/run/mysqld/mysqld.pid'

View 8 Replies View Related

Programming :: Error - Array Type Has Incomplete Element Type

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.

View 5 Replies View Related

Programming :: Stat On Cifs - Fails With Error No 75 - Error Shows "Value Too Large For Defined Data Type"

Dec 29, 2010

i have Ubuntu10.10 (kernel-2.6.35-22-generic) installed. struct stat StatBuff;

[Code]...

I have mounted a windows share folder on /mnt. When i gave any directory within /mnt/ to stat function it fails with errorno 75. perror shows "Value too large for defined data type". Example 1 is fail but Example 2 works fine.

View 7 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved