Programming :: Invalid Conversion From Bool?
Jul 18, 2011Dear Advanced c/g++ on boost programers: I have copied and testd a simple (Copy a file with Boost) program from page 372, Example10-10, book(C++ cookbook)
[Code]...
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Programming :: Compiler Error: "Conversion From 'bool' To Non-scalar Type 'std::string' Requested"
Mar 5, 2010As 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.
Programming :: Invalid Conversion From �char� To �packet_t�?
May 24, 2010I am writing a code to restore original packet type from encapsulated packet type. However the following error occurred. Below is an extract of my code. Would appreciate if someone could help me explain why the error occurred and how to resolve this.
packet.h
struct hdr_cmn {
packet_t ptype_; // packet type
[code]....
Programming :: Fixing C++ Invalid Conversion From Const Char* To Char?
Mar 4, 2010m 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]...
Programming :: C++ Invalid Conversion From Const Char* To Char*
Jul 9, 2010I 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.
Programming :: C Bool Return Values Conventions
Oct 30, 2010I have a function that returns a boolean value, True of False. Is there any convention whether 0 = False or 0 = True? It should be obvious, 0=False, 1=True. However programs usually return 0 on success and reserve higher numbers for error values. I.e. if the program finishes successfully (function int main() finishes successfully ), it returns 0 - and that contradicts that 0 should be false.
And especially if I want a function to do some computations on parameters passed by reference and return success status. Should it return 1 (true) for success, or should it return 0 for success - like any Unix program does?
Is there any convention for this?
Programming :: Qt Conversion From Ascii To QString?
Aug 25, 2010I'm working on a Qt program and when it gets to the following line of code I get a seg fault:
QString blah = QString::fromAscii(entry->d_name, 256);
entry->d_name is a 256 byte character array returned by readdir(), I would expect this line of code to convert that character array from ascii to a QString, but I get a seg fault and I'm not entirely sure why..
Programming :: Warning: Deprecated Conversion From String Constant To Char*
Jul 3, 2010I'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 ?
Programming :: G++ Warning - Deprecated Conversion From String Constant To 'char*'
Jan 10, 2011My 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?
Programming :: Custom Progress Bar Of Video Conversion Script (FLV To XVID)
Aug 7, 2010i have written a bash script to convert flv files (e.g. videos) to xvid to be played on my dvd player. the conversion is not really the issue, as it works. what i am dealing with now are 2 problems i have not found a good workarouond:
1. surpressing the shell output of mencoder completely ( i do not want to see all the mencoder messages). this i have only solved to a certain extend.
2. i want to create a progress bar. this one i have not yet cracked.
the script:
code:
#!/bin/bash
## settings
v_bitrate=768
video_opts="-ovc xvid -xvidencopts bitrate=$v_bitrate:autoaspect"
audio_opts="-oac mp3lame -lameopts fast:preset=standard"
store_dir=./converted_files .....
#start the script
main_menu
1. mencoder output: using /dev/null works more or less. for example: if mencoder detects a double frame while converting, a message is still printed on the bash screen
2. progressbar: i have no clue yet on how to do this. any link or tip is welcome.
my goal is something like this:
[56%] [time in progress] [timeleft]
Programming :: Conversion From Infix To Postfix And Compilation Of Postfix For Eval
May 11, 2010I was trying to write a graph plotting program with c++. I need to convert the infix expression from user to postfix expression for quick evaluation. However, the evaluation of postfix is kind of interpreted, and thus kind of slow for evaluating huge number of values. Say if I plot an implicit function the penalty is quite huge. Is there a way that I can compile the infix expression from my running graph plotting application for high speed evaluation.
View 6 Replies View RelatedProgramming :: Extra "10" Printed After Every Conversion From ASCII To Int?
Dec 1, 2009I have a very basic program which I wrote, to print the integer equivalents of an ASCII character. The code is below:
Code:
#include<stdio.h>
int main(void)
{
char c;
[code]....
The code is supposed to take a character as input and print the integer equivalent of that character. But the problem is that, after printing the integer equivalent, it prints an extra '10', every time.
Code:
f
102
10
[code].....
Why does this extra '10' always come? When the code is just a simple:
Code:
#include<stdio.h>
int main(void)
{
[code]....
The code works just fine. There is no extra '10' displayed. I am using Ubuntu 9.10 with gcc-4.4.1.
Programming :: Cannot Understand Invalid Read Error
Aug 25, 2010I have just started using Valgrind,which really is great. Most of the reported errors look kinda weird, though I can't really understand what's going on here, for example:
==00:00:02:52.033 7754== Invalid read of size 4
==00:00:02:52.033 7754== at 0x80B0987: MyCls::MyPrintf(long, char*, ...) (MyCls.cpp:270) ...
==00:00:02:52.033 7754== Address 0x47a5ee8 is 0 bytes after a block of size 296 alloc'd ...
==00:00:02:52.033 7754== by 0x809A6C1: ClsMain::taskRun(int, char**) (ClsMain.cpp:177)
==00:00:02:52.033 7754== by 0x816CFE8: main (main-C.cpp:2060)
==7754== ---- Attach to debugger ? --- [Return/N/n/Y/y/C/c] ---- Y
==00:00:02:57.410 7754== starting debugger with cmd: /usr/bin/gdb -nw /proc/7765/fd/1014 7765
GNU gdb Red Hat Linux (6.5-25.el5rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as
"i386-redhat-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1".
Attaching to program: /proc/7765/fd/1014, process 7765
MyCls::MyPrintf (this=0x47a5dc0, iPrm=3,
sMsg=0x6974320 "blablabla"...) at MyCls.cpp:270
270 cout<<endl<<"m_FilePtr="<<hex<<m_FilePtr<<dec<<endl;
Basically, Valgrind reported the "Invalid Read" error at line 270 of file MyCls.cpp, which is simply a cout of the m_FilePtr variable, which is a member variable of the MyCls class. It's a FILE* variable I use to write repeatedly on a text file. The address reported (0x47a5ee8) is 296 bytes after the "this" pointer (0x47a5dc0),as Valgrind correctly tells me but I honestly don't understand that. And of course, I need to read that variable, not only for the cout (indeed,the error is reported at every reading attempt). Besides, the application doesn't crash, but still I would like to understand if I really have to worry about this "error".
Programming :: Code Omitted And Invalid Command
Apr 22, 2011I am getting following error during execution of the example program
[root@localhost NSExamples]# ns example1b.tcl
ns:
[code omitted because of length]
: invalid command name "4"
while executing
"4 "
[root@localhost NSExamples]#
i ran the same program successfully but after placing a protocol i couldnt run this
Programming :: KSH - Script Error - Invalid Command ?
Aug 3, 2010Essentially my ksh script calls a program and passes some commands. It's entering the program just fine, but when it passes the commands it gets "invalid command" error, and loops for a bit.
When I run all the steps manually the program works fine. I turned debug on and see that it enters the program, cmbview, but for whatever reason, it fails on any command that it tries to parse.
Tried running it in a ksh shell, same error. Tried running it as bash shell, same error.
The cmbview exe works and the following commands work, so I can only assume its something with the script parsing the commands.
Programming :: Library Linking - ELF File OS ABI Invalid Error
May 6, 2010[root@shankar-lx src1]# make
gcc -c main.c
gcc -c database.c
gcc -c e_sqlite.c
gcc -o TEST main.o database.o e_sqlite.o /usr/local/lib/libsqlite3.so.0.8.6 -w -lpthread
[root@shankar-lx src1]# ./TEST
./TEST: error while loading shared libraries: /usr/lib/libsqlite3.so.0: ELF file OS ABI invalid
My application compiled well but when try to run, it is giving ELF file OS ABI invalid ERROR. What is this error.
Kernel version is 2.4-18
Programming :: Error : Glibc Detected Invalid Pointer
Aug 5, 2010hey dude error in gnu c pointer
I am using Red Hat Enterprise Linux 5.0.
#include <stdio.h>
#include <stdlib.h>
int main()
{
char * cp = NULL;
[Code].....
Programming :: Invalid Next Size (fast ) Error : Cant Figure Out?
Apr 24, 2011So I've been writing a code and I have been adding functions to make life easy, but all of a sudden when i added the last function I got this error *** glibc detected *** /home/ahzeeper/Desktop/C-code/check6: free(): invalid next size (fast): 0x0804c048 ***followed by a huge backtraceNow here is my code
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
[code]...
Slackware :: Config PREEMPT_VOLUNTARY Bool "Voluntary Kernel Preemption (Desktop)"?
Apr 6, 2011I found in one thread a note about some kernel config parameters which should be used by servers.
Code:
config PREEMPT_VOLUNTARY
bool "Voluntary Kernel Preemption (Desktop)"
[code]....
Debian Programming :: Python-TK Alloc - Invalid Block Error
Sep 23, 2015Just installed Debian 8 last night and trying to run one a few of my scripts that use easygui (a front-end for python-tk basically) and I keep getting alloc: invalid block any time a file or folder selection dialog is presented. I'm able to select a file/folder with no issues, but once the dialog closes I get a variation of what appears to be a memory error followed by alloc: invalid block.
Here's one of my scripts that does it. This one pops up a file selection dialog pretty early on to ask for a file to check, and as soon as I select any file the dialog closes and that error appears in the terminal. It happens whether I run it with Python 2 or Python 3. You will need to install python3-easygui for this script to run properly if you want to check for yourself what happens. This is a first time encountering this error for me.
Programming :: Ext3 To FAT32 USB Drive Filename - Invalid Characters
Feb 13, 2011I am using Debian Lenny 5.0.3 with a stock 2.6.26-2-amd64 kernel, and have a ~/Documents/HTMLS directory of 273.2MB (21590 files, 1063 sub-folders) which according to konqueror shows 1130 items - 572 files (60.8MB Total) - 558 folders, these were created by 'Save Page As' in Iceweasel 3.5.11. I am trying to copy the contents of this directory to a similar directory on a 2GB USB thumbdrive /dev/sdb1 which was partitioned and formatted as fat32 by Qparted. Problem is that the copying ceases after about 6 files transfer. I found that (as I am sure you know) the named.html files come with a matching named_files folder, and often there are what appear to be invalid characters such as '*','?',and ':' in the filenames in said named_files folders.
After exhaustive googling [I know we all say that] I found an instruction:
Code:
pax -rw -s '/[*?:]/_/gp' stuff /fat32/partition
that changes the name of the files, replacing said characters with '_', but whilst I can get pax from my repos, I really don't want to 'archive' the files - since I understand that pax was created to bridge a war between tar and cpio - because I want to be able to read the html files on an old (not connected to the Internet) WinXP tablet. So, I believe that I need to create a script, that scans all the filenames, greps and seds to replace said 'unacceptable' characters. I am assuming that Firefox on the Tablet PC will be able to open the htmls if I can get them onto the thumb drive. Are there any other known characters in filenames that M$ file systems can't handle?
Programming :: Insmod: Error Inserting 'kernel.ko': -1 Invalid Parameters?
Jan 16, 2010insmod: error inserting 'kernel.ko': -1 Invalid parametersI am getting this error when i am try to insert kernel.ko into kernelMy systemfedora 12 with gcc 4.4.2insmod kernel.koinsmod: error inserting 'kernel.ko': -1 Invalid parametersmy program
__________________kernel.c________________________ ___________
#include <linux/module.h> /* Needed by all modules */
#include <linux/kernel.h> /* Needed for KERN_INFO */
[code].....
General :: Invalid ACPI: Invalid PBLK Length [5] During Debian Boot
Sep 20, 2010I installed Debian 5.03 Lenny successfully on my machine. I got this error during boot: ACPI : invalid PBLK length [5]. After that the Operating System boots properly and starts normally. What does this error statement mean? Is it safe to work with this installation despite this error?
View 1 Replies View RelatedGeneral :: Parsing Err Or Invalid $END - Correct User Use Of Invalid Characters
Feb 10, 2011Trying simply to insert into table. Have succeeded in doing this but now want to correct user use of invalid characters. If I'm understanding correctly, Real-escape-string seems to correct these, so I've been trying to figure out how to use it. A short, test code version gives me a syntax error at INSERT VALUES, which--because it still has the single quotes in the text--tells me the real-escape-string didn't work. The code below gives me a parseing error with invalid $END at </body>.
Insert Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' VALUES (UTC_TIMESTAMP,'What's happen' bra?')' at line 1 Parse error: syntax error, unexpected $end in /home/powere15/public_html/DB/exercises_insert_record.php on line 94
<html><head><title>Exercise Catalog Insert Record</title></head>
<body>
<?
/* Change db and connect values if using online */
[Code]....
Programming :: Getting Error 'couldn't Compile Regular Expression Pattern: Invalid Character Range'
Nov 19, 2008I'm having a bit of trouble with a regular expression I'm trying to write and I'm not sure if it's something Tcl specific or my lack of regexp understanding.
[Code]...
I get a number of strings passed to a proc in the format 3|x where x is a number, either 0 or within the range 5-12. My understanding is that that regexp will match the literal '3' followed by a '|', the escapes the special meaning of |, and then 0 or, because of |, a number within the range 5-12. However I'm getting the error 'couldn't compile regular expression pattern: invalid character range'.
Programming :: Realloc(): Invalid Next Size / Getting Error With Reallocate Memory In MakeDSt Function For DSt->SArray?
Jul 19, 2011I wrote a test program for learning usage of realloc() and I thin I did everything right but I get this error exactly with my 4th time that while tries to reallocate memory in MakeDSt function for DSt->SArray:
Quote:
realloc(): invalid next size
this is my complete code :
Code:
#include <stdio.h>
#include <stdlib.h>
typedef struct DRA
{
code....
Programming :: Socket Option "IPV6_ROUTER_ALERT" Is Invalid / Why Is So?
Jan 15, 2010I want router catch the ip packet which mark router alert label, change it and send to the next hop. Not just forward it immediately.
So I set IP_ROUTER_ALERT and IPV6_ROUTER_ALERT option for ipv4 and ipv6 socket. IP_ROUTER_ALERT was just fine and I can do what I expect. However when I set on IPV6_ROUTER_ALERT, it tells me "Protocol not available" (errno = 92). And This option can be found in "$Kernel/net/ipv6/ipv6_sockglue.c"
Ubuntu Installation :: Grub And 9.04 - Error "invalid Command" Or "invalid Execution Format"
Aug 16, 2011Bottom Line: Dvd Drive died in my toshiba laptop and it was replaced (not before tech for some reason reformatted the Win7 partition... which was 100% un-needed, but thats beside the point now. I redid win7 (the tech installed vista) and am TRYING to "redo grub". Facts: The Slackware AND Ubuntu Partitions ARE STILL THERE and when i use SuperGrub Boot CD (which doesn't restore my grub by itself) to boot into slackware, i can see ALL THE CONTENT of both Linuxes still there including grub on ubuntu partition
(Tri-Boot: Ubuntu, Slackware, and WIn7) I had it working for two years or so, SO i know this "setup" works fine. I am A) Trying to do this as simply as possible. B) Trying to avoid the need to download a 800MB ISO (as seen for this issue on this forum) and trying not to have to reformat Ubuntu Partition (though I have the .Debs I have downloaded for it backed up ... all 1.7GB of them) I have /dev/sda1 as win7, /dev/sda2 as Slack and /dev/sda3 as Ubuntu (which contains Grub Legacy).. Every command I do seems to result in an error like "invalid command" or "invalid Execution format " (i think that second one is right) type errors. I compiled (awhile back) a few kernels for Slackware, but feel goofy that I cant figure what i this out (what i thought was going to be a "2 minute" fix)
Software :: Conversion From WAV Through CDR To MP3
May 21, 2011In 2003 I converted over 25000 of invalid WAV files to MP3 ones using the sequence of commands:sox file.wav file.cdr lame file.cdr file.mp3.I used that intermediate method because it wasn't possible to convert most of these WAV files using lame only. The command lame file.wav file.mp3 displayed in such cases the message:Code: Unsupported data format: 0x0002.Now I tried to convert the same WAV files using the same method but lame doesn't recognize CDR audio format and complains:
Now I wonder how to achieve the same result enabling CDR audio format reading in lame because I prefer the second method. Unfortunately I haven't idea how to enable that during the configuration of the sources of lame. Its documentation doesn't mention about such switch.
Programming :: Perl Switch Statement Throwing Error Like Bad Case Statement (invalid Case Value)?
Oct 6, 2010I've written a simple perl code to learn switches in perl.My code is pasted below,
#!/usr/bin/perl
$opt = 1;
switch($opt) {
[code]...