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Serialization Primer[^]
-- modified at 12:58 Tuesday 27th March, 2007
why did you delete your question ? are you selfish not to allow people to know what you were looking for ? 
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Hi,
I am trying to compile a single dll from several static library projects in VS2005. However as it seems the compiler does not link the .lib libraries to the dll unless they are referenced in the dynamic library project. Is there any way (linker flag?) that I can aggregate several .libs in a dll file without having to reference their classes/functions/vars?
Thanks,
Themis
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Themis wrote: Is there any way (linker flag?) that I can aggregate several .libs in a dll file without having to reference their classes/functions/vars?
if you're not referencing them, why do you want them included in your DLL ??
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to aggregate them in a single "super-DLL" ?
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Yes I want to create a super-DLL that others (apps or dll) can link and refer to its included objects.
However I don't want to merge the several .lib projects into one .dll project to generate my dynamic library as my .libs do not match conceptually, hence I prefer to have them separate in the Solution Explorer. Think of a large base dll with several support projects, like networking, serialization, utilities etc. all merged in a single project_base.dll.
Cheers,
Themis
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add your .LIBs to the Additional Dependencies field in the Linker/Input propoerty page.
then you will need to explicitly export all of the functions and variables from the various .LIBs, from the DLL.
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I have already added the dependencies in the dll properties. However I am not sure what you mean when you say "you will need to explicitly export all of the functions and variables from the various .LIBs, from the DLL".
I export symbols (classes/functions) using dllexport in each project. Do you mean that I have to do anything more in the dll project? The fact is that without referencing a class from the dll project it will not be linked by the linker to the target dll. I am wondering if I can bypass this linker "optimization" and make the linker unconditionally add a class' code in the dll.
Cheers, Themis
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Hi, i want detect any change in desktop area. Like, a new apllication run, desktop wallpaper change, etc
[go to end]
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MachineMHK wrote: Hi, i want detect any change in desktop area. Like...desktop wallpaper change, etc
Assuming that SystemParametersInfo() was used to make the change, handle the WM_WININICHANGE message.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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hi all,
how to get difference between two dates using CDateTimeCtrl ?
venu
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Simple - extract the date / time from the control CDateTimeCtrl::GetTime (...). You would then have a CTime, SYSTEMTIME, or even a COleDataTime.
CTime has comparison functions you can use.
Iain.
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Put the two times in a COleDateTime object, and get the difference via COleDateTimeSpan.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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Hi everyone,
I'm attempting to write a program that takes command line arguments, reads data in from a file,
and then appropriately searches for certain data or sorts the data for output based on the argument passed.
I am having trouble figuring out how to actually sort the vectors according to the attributes.
the struct is as follows:
<br />
struct Wizard<br />
{<br />
string FirstName;<br />
string LastName;<br />
int Grade;<br />
double WandWeight;<br />
};<br />
The datafile being read from simply has each property separated by a single whitespace character. The vector is declared simply as:
<br />
vector(Wizard) wizVec;<br />
(NOTE: angle braces would not show up in preview, assume they take the place of the round braces in the vector declaration)
Don't ask about the name of the struct, it's my prof's example!
Any suggestions or solutions are appreciated and needed!
Thanks in advance!
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To get < and > to show, you need to check 'Ignore HTML tags' below.
You can write a function object that compares two Wizard objects, and pass that into the sort algorithm.
Here[^] is an article on the subject.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Use std::sort to sort the vector. Add an operator < for your struct to define the sort order or code a predicate function or functor and pass it to std::sort.
Steve
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Thanks for the article Christian, and the suggestion, Stephen. I will try to follow the instructions in the article. I appreciate the help, and the speedy replies 
Does this logic make sense in context?
void SortVecAscending(vector<Wizard> &wizVector, string prop)
{
// Sort vector smallest to largest, according to prop(erty)
bool compare_Wizards(const Wizard& a, const Wizard& b)
{
return a.prop < b.prop;
}
std::sort(wizVector.begin(), wizVector.end(), compare_Wizards);
}
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Yes, that looks like it should work.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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C++ does not support local functions (functions in functions). You can have functors in function however.
Steve
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C++ does not support local functions (functions in functions). You can have functors in function however.
Steve
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Thanks again for all your help, gentlemen. I got the sorting working with no more problems.
However, now that I have moved on to the searching portion, I find that the way the project is designed,
I have to search for values in the structs that are NOT strings.
To refresh your memory:
struct Wizard
{
string FirstName;
string LastName;
int Grade;
double WandWeight;
};
Is there any viable way to convert a string to an int, a string to a double, or vice versa?
I have attempted to use static_cast<string>() on the int and double values, and static_cast<int>() / static_cast<double>() on the string values, but the compiler didn't like those conversions.
I have looked around, and there is nothing available to me without downloading someone's class and using it. Since this is a school project, I have a feeling that would be frowned upon.
Any ideas?
If any clarification is needed, simply ask.
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There are multiple ways, here's one:
#include "StdAfx.h"
#include <iostream>
#include <string>
#include <sstream>
int main()
{
using namespace std;
string s = "1234";
int num;
istringstream ss(s);
ss >> num;
if (ss)
{
cout << "Number is " << num << endl;
}
return 0;
}
And another:
#include "StdAfx.h"
#include <iostream>
#include <string>
#include <cstdlib>
int main()
{
using namespace std;
string s = "1234";
int num = atoi(s.c_str());
cout << "Number is " << num << endl;
return 0;
}
The second method is easier but error handling is more difficult as if no valid conversion could be performed, a zero value is returned. Also, in the first version simply changing the type of the num variable will make the code work different types but the second version requires a distinct function for each type: atoi only works for ints.
Steve
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Thanks again!
I ended up using the stringstream approach, as our prof is fanatical about us not using "pure" C functions.
You guys are life savers!
Regards,
Bryan
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Your professor is a wise man.
Steve
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