C++ :: Error Handling When Using Boost NonCopyable
Aug 2, 2014
I have been using a Boost NonCopyable library in Microsoft Visual Studio 2013.
What I have is the following error message:
Error1error C2280: 'boost::noncopyable_::noncopyable::noncopyable(const boost::noncopyable_::noncopyable &)' : attempting to reference a deleted functionc:usersjohndocumentsvisual studio 2013projectsdonttreaddonttreaddonttread.cpp181DontTread
Now what I want to rectify the error is to throw an exception, so that the program can compile smoothly.
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May 9, 2014
#include<iostream>
using namespace std;
void E();
void T();
void F();
void match(char m);
[Code] ....
I have written this code for predictive parser. It is working for valid input but it is not working for invalid input when i give invalid input it says its valid. How to do error handling in predictive parser.
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Jan 30, 2015
void main() {
clrscr();
cout<<" Menu";
cout<<"
1. Display all the employees' info.";
cout<<"
2. Display specific employes' info.";
cout<<"
3. Display employee with max salary.";
[code]....
Declaration syntax error at line 89, I don't get this everything is proper.
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Apr 23, 2014
I am writing to write a program and performs the following tasks
- Reading a file (txt file contains some temperature values)
- Display the temperature values (contents of the file)
- Calculating the average of the temperature values in the file.
- finds the maximum and minim value of temperature in the file.
The program is user interactive and waits for the user input and process according to his input (choice)
I have managed to complete the program and covered all the expect except the error handling for file opening and reading, although I have managed to do it for the part one part (i.e for the choice == 1)
I can repeat it for the other choices (i.e for 2, 3 ) but I do not want to repeat the code and do it in a different function or do it once for all. While making an attempt I can not handle the rest of the program and all the program turns into a mess.
#include <iostream>
#include <fstream>
#include <iomanip>
int menu();
int myChoice(char);
char inputValidating();
[Code] .....
Need Error handling for file opening and Reading that is used once, So far I have managed to do it for choice 1
Text file can be found in the attachment
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Jan 4, 2014
I finished my Enigma cipher simulator...how should I write the error handling code? Should I throw an exception in main, or in the Enigma ctor and Encrypt() fn when the user enters a non-alphanumeric character?
Rotor.hpp
Code:
#ifndef ROTOR_HPP
#define ROTOR_HPP
class Rotor {
public:
Rotor(char pos='A');
Rotor(const Rotor & rhs);
Rotor& operator=(const Rotor& rhs);
[Code] ....
Output
Code:
Enter rotor settings:
ABCDEFGHIJ
Enter cleartext:
HELLO WORLD
Ciphertext:
0O258 SGY5V
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Aug 4, 2012
The code is compiled.
If I do loops for push and pop fucntions in main.cpp the same size as Stoke everything is working properly
If loops are larger than the Stack size that goes here is a picture in the console (see screen print)
Code:
//
//(---.Array_hpp---)
//
#ifndef Array_HPP// Preprocessor gates
#define Array_HPP
#include <sstream>
#include <iostream>
#include <exception>
template <class Type>//Remove the "=double" default parameter.
[code]....
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Dec 20, 2014
I'm new in programming, and trying to write a code in C. The requirement is following - to write a text, and to find frequency of 1 chosen character in it. The main thing is that program should check user input (for example, I want to check if user entered "char" --> then correct, or if entered "int" --> not correct). But the program still doesn't check. So I have:
Code:
#include <stdio.h>
int main(){
char c[1000], ch;
char i, count=0;
printf("Enter a text: ");
gets(c);
[Code] ....
Am I on my right way using if/else?
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Nov 24, 2013
I have this code for a computer project... (store management) but the character strings are not copied on text file..
#include<iostream.h>
#include<conio.h>
#include<fstream.h>
class Store {
public:
char *item_name[5];
store()
[Code] .....
Now when i run the program, it gives a error :::
ERROR
address 0x0
How can i write these strings to the text file?
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Feb 23, 2013
I wrote a program to run long simulations, in one cpu core computation. During the run, I checked the cpu occupation was always around 85%.
Since my simulation took time to run. How can I boost it up to make my cpu run at 100%? Is that because my RAM is not fast enough?
info about my laptop: cpu frequency: up to 3.2 GHz. RAM frequency: 1333 MHz.
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Dec 19, 2013
I have in my main(), a function that creates my arg object using boost/program_options.hpp i want to pass this object to another function using templates like this:
Code:
template <typename Targ>
void Count(Targ & arg){
MyObj<string> QueryTab(arg["input-file"].as<string>()); //line number is 352
...
}
However I get an error:
Code:
../include/Filter.hpp: In member function ‘void Count(Targ&)’:
../include/Filter.hpp:352:40: error: expected primary-expression before ‘>’ token
../include/Filter.hpp:352:42: error: expected primary-expression before ‘)’ token
... obviously it does not recognize my intention, what did I do wrong?
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Mar 5, 2013
I have an issue getting boost libraries to work with QT IDE. Here are relevant lines from my .pro file...
INCLUDEPATH += c:/users/bob/desktop/boost_1_53_0/
LIBS += -LC:c:/users/bob/desktop/boost_1_53_0/stage/lib64
After adding #include <boost/filesystem.hpp> I get error...
C:UsersobDesktopqtpuntitled5mainwindow.cpp:3: error: C1083: Cannot open include file: 'boost/filesystem.hpp': No such file or directory
The IDE does not highlight the line. The error only appears on compilation.
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Mar 12, 2014
I have one problem deleting a file with boost. The file is opened in another application and cannot be deleted. I am supposed to received an exception error but I don't get it.
Here is my piece of code, very simple:
bool delete_file(const string &path) {
boost::filesystem::path bpath(path);
try {
if (boost::filesystem::remove(bath)) return true;
[Code] ....
I have put a breakpoint inside the catch part but it does not come to this point. Instead, the the output window of visual studio, I got these lines:
First-chance exception at 0x00007FFD2E575A88 in site_server.exe: Microsoft C++ exception: boost::filesystem::filesystem_error at memory location 0x00000070F8E3E920.
Unhandled exception at at 0x00007FFD2E575A88 in site_server.exe: Microsoft C++ exception: boost::filesystem::filesystem_error at memory location 0x00000070F8E3E920.
How to manage this situation?
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Nov 29, 2013
exportmain.cpp
Code:
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>
// Create an empty property tree object
using boost::property_tree::ptree;
#include "kwxport.h"
#include "resource.h"
[Code] ....
How can I make boost:roperty_tree:tree get recognized by the compiler?
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Oct 1, 2013
i have written an algorithm in VC++ 2010 express edition. i have used the following header files
#include<iostream>
#include<string>
#include<sstream>
#include<ctime>
#include<cassert>
#include<fstream>
#include<vector>
[Code]...
the algorithm worked fine in vc 2010 express edition....
the following header files are not working in vc5
#include<regex>
#include<tuple>
#include<numeric>
#include<unordered_set>
#include "clip.h"
Looks like some of hte boost libraries have to added with vc5.. If any one knows how to add boost libraries with vc5.
showing lot of errors in vc5... not able to run the algorithm in vc5. Our company has only vc5.... the algorithm has to be implemented in vc 2010....
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Mar 23, 2014
[URL] ....
I wonder how tag reading can be achieved? If say I have a file like
<name>
<firstname>John</firstname>
<surname>Robinson</surname>
</name>
I'd like to read "firstname" or "surname" instead of John or Robinson ....
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Sep 5, 2013
So I need to use boost/regex for regular expressions. someone told me that it needs to be built. the first problem is boost doesn't tell you how to build it and the second is i did sudo apt-get install libboost something. I don't remember the exact name of the package. it installed but i dont know how i would build it when its installed.
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Dec 17, 2014
I have written a program that uses boost in visual studio 2012. The only boost library I used is filesystem by doing.
1)Properties->Linker->General and adding the path or the .lib to the additional dependencies. The libraries, link at compile time.However when i move the exe to a different computer, it doesn't work. Therefore the libraries were dynamically not statically linked. So my question is how do I statically link the filesystem library, so that i can include boost/filesystem.hpp in visual studio 2012?
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Aug 21, 2014
i've created dll and implemented shared memory that every connected process can use. My problem is that i can't change anything in object, which is stored in the memory.
my class :
class MyClass
{
public:
MyClass();
void test();
int counter;
};
void MyClass::test() {
MessageBoxA(NULL, "test", "test", 0x0000000L);
counter++;
}
in stdafx.h i have :
static offset_ptr<MyClass> offset_mt;
static managed_shared_memory *memSegment;
I initialize shared memory and pointer :
memSegment = new managed_shared_memory(create_only, SHARED_MEMORY_NAME, 4096);
offset_mt = memSegment->construct<MyClass>("MyClass myClass")();
And then in an exported function i call
offset_mt.get()->test();
Im calling this from Java using JNA and result is a memory error (Invalid memory access). However, if I delete 'counter++' from test method, everything works fine - message box appears. Is there a limitation that I cant modify objects inside mapped memory or is this done the other way?
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Aug 4, 2014
I am using boost matrix for generating matrices used for filters. I wan to assign a pointer to these matrices so i can call them out of the function. but i am not able to understand where i am failing. the example code is here.
int main(int argc, char *argv[]) {
QApplication a(argc, argv);
identity_matrix<double> M(3);
std::cout<<M<<std::endl;
[Code] ....
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Sep 30, 2014
I have built Boost from the website using
./bootstrap.sh
./b2 install
I think all are installed properly. I am trying to use Xcode to include the library of boost:thread.My code links to the header file properly with " #include "boost/thread.hpp"" commented, as seen from the following:
However, it could not link properly to boost-thread if "#include "boost/thread.hpp"" is un-commented.
Error page is shown as:
I have linked the dynamic library libboost_thread.a and libboost_thread.dylib and included /usr/local/include into header search path and /usr/local/lib into library search path.
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Jun 7, 2013
I have the following code which is based of the tut3.cpp example at: [URL] ....
However, I'm not entirely sure how to retrieve the full file path which I'd like to use to get the file size. So essentially the aim is to go through a directory and list all the file sizes.
Code:
if (exists(p)) {
if (is_directory(p)) {
cout << p << " is a directory containing:
";
copy(directory_iterator(p), directory_iterator(), // directory_iterator::value_type
[Code] ....
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Jul 11, 2012
I wanna create mesh Array using boost elements, that will be do the same that code below, but can accept numbers of double. Any boost array that give me needed functionality. It will be great that advised element has the same argument list. I mean
// [base,stride,bound)
// [0,2,4)
Or may be there are any opportunity modify this boost::multi_array_types::index_range in order do make it accept double...
1>------ Build started: Project: HP_A.1_d_, Configuration: Debug Win32 ------
1> Main.cpp
1>c:all myс++ha level 9solutionlevel 9hp_a.1_d_main.cpp(15): warning C4244: 'argument' : conversion from 'double' to '__w64 int', possible loss of data
1>c:all myс++ha level 9solutionlevel 9hp_a.1_d_main.cpp(15): warning C4244: 'argument' : conversion from 'double' to '__w64 int', possible loss of data
1>c:all myс++ha level 9solutionlevel 9hp_a.1_d_main.cpp(18): warning C4244: 'argument' : conversion from 'double' to 'unsigned int', possible loss of data
1>c:all myс++ha level 9solutionlevel 9hp_a.1_d_main.cpp(20): warning C4244: 'argument' : conversion from 'double' to 'unsigned int', possible loss of data
1>c:all myс++ha level 9solutionlevel 9hp_a.1_d_main.cpp(20): warning C4244: 'argument' : conversion from 'double' to 'unsigned int', possible loss of data
1> HP_A.1_d_.vcxproj -> C:all myс++HA level 9SolutionLevel 9DebugHP_A.1_d_.exe
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
Code:
#include <boostmulti_array.hpp>
#include <iostream>
typedef boost::multi_array_types::index_range range;
[Code]....
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Nov 22, 2012
I was wondering if it was possible to access data from an array inside a threaded function after it has finished executing?
Take this example:
Code:
#include <iostream>
#include <boost/thread.hpp>
using namespace std;
[Code]....
After workerFunc has finished, how could I access the array arr? Is there any way to get (3,4,5,6,7) back into main()?
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Apr 24, 2014
I have been working with and trying to understand Boost for random number generating. I've come to understand that what I want is now in the C++11 standard, but I've stuck with Boost.
What I have done is create a simple main.cpp that generated random numbers successfully. From there I wanted to create a more optimal system by separating out the random code portion to a class that can be instantiated and called on demand. My problem now is that when I call the random routine of the class I just get one number no matter how many times it's called.
I know that rapid seeding is an issue so I put the seed function of the random portion in the class's constructer so that it is only called once on the creation of a class. I also tried making it a static member, but I haven't had success with that yet either. For now though, I would simply like to get successive random values upon calling the class's random function.
class header Code: #ifndef roomGen_hpp_
#define roomGen_hpp_
#include"boost/random.hpp"
#include"main.hpp"
class
roomGen
{
private:
boost::mt19937rngDimensions;
[code].....
The main.hpp file only contains a couple of struct definitions. In main I call the class with Code: randomRooms.push_back(randRooms.createRoom()); to get back a struct with random values and push it into a vector.
I'm unsure what I'm doing wrong here to only get back a single non random number from successive calls. I have tried moving the variable creation lines from roomGen::createRoom() to the private area of the class definition, but that causes me to get a slew of undefined errors so I had to settle on putting those declarations inside the function.
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Apr 5, 2013
I've been studying metaprogramming and reviewing many documents and code regarding boost files. What I've been trying to understand and accomplish is creating various types using typedef, template and struct, similar to that of the boost files themselves, to create comparators. Ultimately, I want to be able to create a type that has sub-properties which can be further compared and classified.
Informal example:
create type
typedef int coordinate[3];
create standards - "typeless prototypes"
static const coordinate _x = {1,0,0};
static const coordinate _y = {0,1,0};
static const coordinate _z = {0,0,1};
We "now have" three variables under one unique type. Now I want to wrap this further to work with other types (int, float, etc.).
create special cases
template<class ty, coordinate c> struct coord_type;
typedef coord_type<int,x> x_i;
typedef coord_type<float,x> x_f;
typedef coord_type<int,y> y_i;
typedef coord_type<float,y> y_f;
typedef coord_type<int,z> z_i;
typedef coord_type<float,z> z_f;
declare more standards
const x_i i_i;
const x_f i_f;
const y_i j_i;
const y_f j_f;
const z_i k_i;
const z_f k_f;
Where other variables can be represented based off this i,j,k standard and written in a more direct vector form.
And so on...
What I essentially would like to do is have x,y,z variables act as standards for an i,j,k system that classify arbitrary variables of the coordinate type: Is the arbitrary variable i, j, or k? Is it defined as an int or float type?
Where arguments such as sum_y = var1 + var2; are valid, provided:
sum_y is outputted as 6j, and var1 and var2 are 2j and 4j, respectively.
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Jun 5, 2014
I am trying to compare strings (char*) using strcmp but I am having a hard time doing it with boost::bind. It compiles but it crashes when I run it.
I have a std::vector<boost::shared_ptr<DeviceInfo>> cMonitoredDevices and one cCurrentDevices. I used a typedef DeviceContainer for std::vector<boost::shared_ptr<DeviceInfo>>.
DeviceInfo is a simply struct that contains a char[128] Name (and other fields not important for this issue) that I want to use to compare.
So I am trying to find the DeviceInfo (based on Name) that are in cMonitoredDevice but not in cCurrentDevices. My problem is retrieving the Name value for the strcmp. Here is what I have so far
for(DeviceContainer::iterator pDevice = m_cMonitoredDevices.begin();
pDevice != m_cMonitoredDevices.end(); pDevice++) {
if (std::find_if(cCurrentDevices.begin(), cCurrentDevices.end(),
boost::bind(&strcmp, boost::bind(&boost::shared_ptr<DeviceInfo>::value_type::Name, _1),
(*pDevice)->Name) == 0) == m_cMonitoredDevices.end()) {
}
}
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