Programming :: Warning: Deprecated Conversion From String Constant To Char*
Jul 3, 2010
I've just updated my linux system (Debian) and went to compile some code I'm working on. However it causes some problems, presumable because of GCC up dates. I get many of my subject line errors for example
../../common/Version_Control.cpp: In function int VersionControl():
../../common/Version_Control.cpp:55: warning: deprecated conversion from string constant to char*
So I check up the error and it comes from my error handler code which is a function
extern void SetError(char *string,int error_number)
The net tells me all I need to do is convert char *string to const char *string, however when I do so and recompile I get the following error
Error_Control.cpp: In function �void SetError(const char*, int)�:
Error_Control.cpp:41: error: invalid conversion from �const char*� to �char*�
make: *** [Error_Control.o] Error 1
I think I've done exactly what's recommended ?
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Jan 10, 2011
My problem is that the warning keeps apperaing when I run g++ compilation.
Say, I have a system runtime function with header (imaginary)sysruntime.h: void printfunction(char *line);
Then in my .cpp file, I will include the above header #include <sysruntime.h>
Then, I do the below:
Line12: char *linetoprint = "Print this line";
Line13: printfunction(linetoprint);
But, I will get the warning message "Line12: deprecated conversion from string constant to 'char*'". (Even though it compiles)
My question is how should I declare my char* so that I wont get this warning message, and can still run printfunction(char* line) correctly?
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May 16, 2011
I am trying, using checkinstall to make eboard to enable use of this program with a DGT electronic chessboard (option not available in the program included in the repositories) according to the instructions given here. After the preliminaries, namely downloading and extracting the source from: [URL]-1.1.1.tar.bz2./configure runs fine but (after su-ing to root), both make install & checkinstall fail after numerous warnings about "deprecated conversion" like:
Code:
board.cc:55: warning: deprecated conversion from string constant to 'char*'
board.cc:157: warning: deprecated conversion from string constant to 'char*'
board.cc: In function 'gboolean board_expose_event(GtkWidget*, GdkEventExpose*, void*)':
board.cc:1414: warning: deprecated conversion from string constant to 'char*'
bugpane.cc:304: warning: deprecated conversion from string constant to 'char*'
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Mar 4, 2010
m getting the following error when trying to compile:Quote:
$ make
g++ -march=athlon64 -O2 -pipe -fomit-frame-pointer -msse3 -c -D_GNU_SOURCE -DPLUGIN_NAME_I18N='"undelete"' -DHAVE_SVDRP -I../../../include undelete.c
[code]...
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Jul 9, 2010
I am having trouble with the following exception class.
Code:
/**Standard Exception
*
*@description
*@update
*@changes
[code]....
Line 43 points at the snprintf() command.I think the error has to do with the function being virtual and the const after the function definition, however although I have been looking really hard I have not being able to find the reason nor the solution to the problem.
One workaround that I know is moving the block of source withing the virtual function, in the constructor, however having read around (boost library exceptions tutorials) it specifically said that formating of errors messages should not take place withing the construction of objects because we are risking throwing an exceptions and messing up the flow order.
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Jul 5, 2011
With this I may remove the last emtpy char which is not visible, coming from net, windows, ...
Code:
echo "$mystringwindowsorotherwithemptylastchar" |sed s/.$//
However if there are not then it makes a problem and delete effectively an existing char.
Code:
echo "klklj" |sed s/.$//
klkl
Anyone would have a solution for SH?
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May 13, 2009
Please look at the comments
Code:
/*
* TEST CASE TO CHECK DIFFERENCES BETWEEN STRING AS
[code]...
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Mar 26, 2011
Do I have the convert the int to a string using stringstream then convert the string to a char? or is there a more direct way?Also is there a way to tell the length of a int?
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Mar 29, 2011
Here is the issue. I am reading in a outside text file and putting in the string on that line into a char array that is already allocated.
Code:
int main(int argc, char *argv[])
{
[code]....
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Mar 5, 2010
As a result, I want to know what this error means, and how to correct it.Here is my code:
Code:
#include <iostream>
#include <cmath>
#include <cstring>
using namespace std;
[code]....
It is once I use the 'try_crack' function inside of main that I get this error.
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Nov 4, 2010
Programming in C.I have two char arrays.char buf1[1024];char buf2[1024];Aren't buf1 and buf2 also pointers?I read in 1024 bytes into buf1 which contain about 300 bytes of characters with newlines. The data is basically a few English sentences. I'm trying to scan buf1 for newlines and then stop at the 1st newline and copy the rest of the data from that 1st newline into buf2.So I run a for loop to look for that new line.
Code:
for(i=0; i<1024;i++) {
if((strcmp(&buf1[i], "
[code]...
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Jan 5, 2010
I see these boot.log warning and understand that the directory where these config files are kept has (or is) changing. Okay, but is the correct procedure to just move them over from the /etc/modprobe.conf dir to the /etc/modprobe.d file? I am wondering if some changes to those config files or those that they are related to must be also made? A portion of the boot.log is below.
[Code]....
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Mar 1, 2010
i got this warning message while booting
WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.
WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.
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Feb 14, 2011
i define variable of type char (range -128 to 127). when i tried to print the value after assigning a -ve value to it it displaying a +ve value of that -ve value(256+value).
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Mar 4, 2010
is it possible to convert a variable from char * to unsigned char ?
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Jun 26, 2011
Is there a way to take a "char*" string in C and turn it into a "FILE*" stream?I tried searching, but all the answers I get are about C++.
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Sep 24, 2009
I'm writing a centralized logging piece, and I need to grep out logs that have specific date tags. The date command returns abbreviated months (Sep), via "#date -d yesterday '+%b'" but I need it all caps. ie SEP vice Sep. Otherwise the grep doesn't catch it
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Oct 22, 2010
copy string a to string b and change string b with toupper() and count the chars
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Feb 27, 2010
this started to happen recently after a reboot due to updates. The screen displays many, meaning more than 12 of: WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/ which is then followed by: Boot has failed, sleeping forever.
I deleted /etc/modprobe.conf, so that is not the problem. The normal boot process will display the modprobe warning twice and all is well. If the warning is displayed more than twice, the boot will fail and I have to try again.
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Mar 12, 2010
I have a problem with compiling vdrift-2009-06-15 using scons. As the source that i obtained only supports scons i cannot use make. the error that i get when i try to compile it in GNOME Terminal is: scons: Reading SConscript files ... scons: warning: The Options class is deprecated; use the Variables class instead.
File "/home/mohit/Download/vdrift-2009-06-15/SConstruct", line 9, in <module>
scons: warning: The BoolOption() function is deprecated; use the BoolVariable() function instead.
File "/home/mohit/Download/vdrift-2009-06-15/SConstruct", line 13, in <module>
Checking for C++ header file asio.hpp... (cached) yes
Checking for C++ header file boost/bind.hpp... (cached) yes
Checking for C++ header file GL/gl.h... (cached) yes
Checking for C++ header file GL/glu.h... (cached) yes
Checking for C++ header file SDL/SDL.h... (cached) yes
[Code]........
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Dec 5, 2010
im using
Code:
scons prefix=/usr qtdir=/opt/qt4
to configure and i get these compilation errors
Code:
scons prefix=/usr qtdir=/opt/qt4
scons: Reading SConscript files ...
Platform: Linux i686
scons: warning: The build_dir keyword has been deprecated; use the variant_dir keyword instead.
File "/mixxx-1.7.2/SConstruct", line 42, in <module>
WE ARE IN: /mixxx-1.7.2/linux_build
QT path: /opt/qt4
Loading qt4 tool...
[code]...
ive been scratching my head at this one for days, i turned on the ubuntu virtual machine and checked what apt wanted to pull, and im suspecting that i need to find the source versions of several packages in regard to qt4 and libqt4 and various libqt4 extensions.
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May 29, 2010
I've never programed shell scripting.
Code goes like so:
I simply want to read a file "data.txt" line by line Then char by char and add them into a result var. The file is supossed to always contain numeric values
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May 3, 2011
I've been trying to understand pthread in C a little better. So I made a simple program that takes in a string from the command line and creates a thread to print the string. I've looked online and copied the basic concepts but there are something things I'm confused about. The programs works just fine, but I have questions. Here's what I have so far.
[Code]....
One thing I'd like to know is why the 3rd argument in the pthread_create function which is my SendMessage function needs to be typecasted to a void pointer and then send the address of the function. Also as for the 4th argument, I would see typecasting to void pointer in some of the pthread examples I saw online, but in my case I'm passing a char pointer, would this be correct? In which case would I ever want to pass a void pointer?
Do I need a pthread_exit(NULL) in my main and in the SendMessage function? If so, why? I added the sleep() function so that I could let the pthread_exit function in my SendMessage function execute first. I simply saw that the online examples on pthread had pthread_exit() in both locations.
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Jun 9, 2010
I used xbindkeys and xvkbd to map my extra mouse buttons to page up and page down. With kde 4.4 it worked, but since I upgraded to kde 4.5 beta, I get the following error when xbindkeys starts:
Code:
*** Warning ***verify that there is not another program running which captures one of the keys captured by xbindkeys. It seems that there is a conflict, and xbindkeys can't grab all the keys defined in its configuration file. And for button press I get
Code:
Warning: Cannot convert string "-*-lucidatypewriter-bold-r-*-*-12-*-*-*-*-*-iso8859-1" to type FontStruct
Warning: Cannot convert string "-*-helvetica-bold-r-*-*-12-*-*-*-*-*-iso8859-1" to type FontStruct
[code]....
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Jan 21, 2010
I'm having some trouble with some adobe fonts (at least I think that's it). Anyways the errors received are
Code:
Warning: Cannot convert string "-adobe-courier-medium-r-*--14-*-*-*-m-*-*-*" to type FontStruct
Warning: Cannot convert string "-adobe-courier-bold-r-*--14-*-*-*-m-*-*-*" to type FontStruct
Warning: Cannot convert string "-adobe-courier-medium-r-*--12-*-*-*-m-*-*-*" to type FontStruct
X Error of failed request: BadName (named color or font does not exist) Major opcode of failed request: 45 (X_OpenFont) Serial number of failed request: 643 Current serial number in output stream: 654 xlsfonts|grep adobe|grep courier
[Code]...
I went looking for those files to see if I could symlink a 14 one to either the 15 one or the other ones, but I couldn't find the files anyways. I get this when attempting to run an X windowed program (qmon) and it crashes out while printing the first set of errors.
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Oct 16, 2010
I have a set of lines as ahown below:
Leon went to school
Leon came back from school..
Leon had dinner...
I have to replace the line containing "dinner" by a single string LUNCH...
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Feb 25, 2011
I need to creates string suffixes out of a Reference string. for eg. suffixes of abcdefg will be
1)bcdefg
2)cdefg
3)defg
and so on...
create an array of pointers to point to the first few characters and then use that pointer to print the rest of the string.But when i print using the pointer i get GARBAGE values! shudn't std::cout<<ptr[w] print the string following the char it is pointing to? why do i get garbage values?
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Apr 18, 2010
So if I'm given a location of a file like:
How can I just take the type of the file at the end? I know I can use strrchr() for a period to get the pointer to the period just before file type. Is there a build in string function that will just take the rest of the string from a certain point on forward in the string? I know it wouldn't be much work to make it myself, but I figured I would find out if it already existed before doing it.
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Mar 13, 2010
Code:
The error is:
Code:
What I want to do is take input of ip4 as a string, convert it to an integer to add 1 to it, then reconvert it back to a string. Its not working.
My full code is:
Code:
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Oct 12, 2009
I've been given a custom-made string class which handles string, wstring and bstr. It has a number of methods and assignment operators to convert to and from different types. The app I work on compiles happily in VS6 and VS2008, but when trying to compile in Redhat (version 4.1.1 in Redhat 5.0)
[code]....
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