Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M 9 6483
"AM" <ab********@gmail.comwrote in message
news:11*********************@o5g2000hsb.googlegrou ps.com...
Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
magically appeared?
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
No, that doesn't match. A dynamically resizeable array is not the same as
an inline array of size 4. Look for the 'fixed' keyword in the C# help.
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M
I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
On Apr 18, 2:01 pm, "Ben Voigt" <r...@nospam.nospamwrote:
"AM" <abhi.me...@gmail.comwrote in message
news:11*********************@o5g2000hsb.googlegrou ps.com...
Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
magically appeared?
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
No, that doesn't match. A dynamically resizeable array is not the same as
an inline array of size 4. Look for the 'fixed' keyword in the C# help.
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M
"AM" <ab********@gmail.comwrote in message
news:11**********************@n59g2000hsh.googlegr oups.com...
>I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
Hard to tell, as you did not post the function declaration (C#), also I'm not clear on why
you allocate a managed array in C# while your C function returns a pointer (to an array in
unmanaged memory).
res.signalStatusArray = new int[4]; // WHY????
res = _validateData(dataToMat, 2); //res is returned from C, it's a pointer right???
I would suggest you to post a complete sample that illustrates the issue.
Willy.
Here is my C++ code
#include "CppMatlabWrapper.h"
#include <exception>
#include <string>
using namespace std;
//Method to validate the data
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time)
{
validationResult res;
res.signalStatusArray[0]=1;
res.signalStatusArray[1]=2;
res.signalStatusArray[2]=3;
res.signalStatusArray[3]=4;
res.micDataValid = (int)(dataToMat[0]*100);
res.rWaveValid = (int)(dataToMat[1]*100);
return res;
}
------------
Here is the header file CppMatlabWrapper.h
//Structure to store the result of the validation operation
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray[4]; //validity of each of the channel data
};
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
This C++ code compiled gives me the library "CppMatlabWrapper.dll"
--------------------------------------------------------------------
Here is the C# code to access this library
using System;
using System.Runtime.InteropServices;
namespace MatlabWrapper
{
class Program
{
//Structure to receive the result of the validation operation
public struct validationResult
{
public int micDataValid; //validity of the microphone data
public int rWaveValid; //validity of the r Wave
public fixed int signalStatusArray[4];
};
[DllImport("CppMatlabWrapper.dll")]
static extern validationResult _validateData(double[] data,
int time);
static void Main(string[] args)
{
//code for creating a double array called dataToMat of
some size
//
validationResult res;
res = _validateData(dataToMat, 2);
}
}
}
THANKS
________
On Apr 18, 5:08 pm, "Willy Denoyette [MVP]"
<willy.denoye...@telenet.bewrote:
"AM" <abhi.me...@gmail.comwrote in message
news:11**********************@n59g2000hsh.googlegr oups.com...
I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
Hard to tell, as you did not post the function declaration (C#), also I'm not clear on why
you allocate a managed array in C# while your C function returns a pointer (to an array in
unmanaged memory).
res.signalStatusArray = new int[4]; // WHY????
res = _validateData(dataToMat, 2); //res is returned from C, it's a pointer right???
I would suggest you to post a complete sample that illustrates the issue.
Willy.
"AM" <ab********@gmail.comwrote in message
news:11**********************@n59g2000hsh.googlegr oups.com...
>I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
I am suggesting looking at the documentation for C# fixed-size buffers which
is here: http://msdn2.microsoft.com/en-us/lib...ya(VS.80).aspx
A dynamic (.NET) array carries additional stuff with it like length.
Additionally, since .NET arrays are ref class, only a pointer is stored in
the structure. This is totally different from the layout used by the C++
structure definition you gave.
>
On Apr 18, 2:01 pm, "Ben Voigt" <r...@nospam.nospamwrote:
>"AM" <abhi.me...@gmail.comwrote in message
news:11*********************@o5g2000hsb.googlegro ups.com...
Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
magically appeared?
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
No, that doesn't match. A dynamically resizeable array is not the same as an inline array of size 4. Look for the 'fixed' keyword in the C# help.
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M
In that case what should my C# definition look like for the
corresponding C++ definition mentioned below?
C++ struct
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray[4]; //validity of each of the channel
data
};
Thanks
On Apr 19, 10:31 am, "Ben Voigt" <r...@nospam.nospamwrote:
"AM" <abhi.me...@gmail.comwrote in message
news:11**********************@n59g2000hsh.googlegr oups.com...
I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
I am suggesting looking at the documentation for C# fixed-size buffers which
is here:http://msdn2.microsoft.com/en-us/lib...ya(VS.80).aspx
A dynamic (.NET) array carries additional stuff with it like length.
Additionally, since .NET arrays are ref class, only a pointer is stored in
the structure. This is totally different from the layout used by the C++
structure definition you gave.
On Apr 18, 2:01 pm, "Ben Voigt" <r...@nospam.nospamwrote:
"AM" <abhi.me...@gmail.comwrote in message
>news:11*********************@o5g2000hsb.googlegro ups.com...
Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
magically appeared?
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
No, that doesn't match. A dynamically resizeable array is not the same
as
an inline array of size 4. Look for the 'fixed' keyword in the C# help.
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M
"AM" <ab********@gmail.comwrote in message
news:11*********************@b75g2000hsg.googlegro ups.com...
In that case what should my C# definition look like for the
corresponding C++ definition mentioned below?
C++ struct
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray[4]; //validity of each of the channel
data
};
C# (not compile tested)
unsafe struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
fixed int signalStatusArray[4]; //validity of each of the channel
data
};
or
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray_0; //validity of each of the channel data
int signalStatusArray_1;
int signalStatusArray_2;
int signalStatusArray_3;
};
>
Thanks
On Apr 19, 10:31 am, "Ben Voigt" <r...@nospam.nospamwrote:
>"AM" <abhi.me...@gmail.comwrote in message
news:11**********************@n59g2000hsh.googleg roups.com...
>I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
I am suggesting looking at the documentation for C# fixed-size buffers which is here:http://msdn2.microsoft.com/en-us/lib...ya(VS.80).aspx
A dynamic (.NET) array carries additional stuff with it like length. Additionally, since .NET arrays are ref class, only a pointer is stored in the structure. This is totally different from the layout used by the C++ structure definition you gave.
On Apr 18, 2:01 pm, "Ben Voigt" <r...@nospam.nospamwrote: "AM" <abhi.me...@gmail.comwrote in message
>>news:11*********************@o5g2000hsb.googlegr oups.com...
Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the
following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
>magically appeared?
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
>No, that doesn't match. A dynamically resizeable array is not the same as an inline array of size 4. Look for the 'fixed' keyword in the C# help.
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M
When I use the struct u suggested
unsafe struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
fixed int signalStatusArray[4]; //validity of each of the
channel
data
};
I get the following error.
Unable to find an entry point named '_validateData' in DLL
'CppMatlabWrapper.dll'.
This error goes away When i remove the array fro both the C++ and the
C# structs. So I think It has something to do with the way my array is
declared in the struct.
Thanks.
On Apr 19, 11:52 am, "Ben Voigt" <r...@nospam.nospamwrote:
"AM" <abhi.me...@gmail.comwrote in message
news:11*********************@b75g2000hsg.googlegro ups.com...
In that case what should my C# definition look like for the
corresponding C++ definition mentioned below?
C++ struct
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray[4]; //validity of each of the channel
data
};
C# (not compile tested)
unsafe struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
fixed int signalStatusArray[4]; //validity of each of the channel
data
};
or
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray_0; //validity of each of the channel data
int signalStatusArray_1;
int signalStatusArray_2;
int signalStatusArray_3;
};
Thanks
On Apr 19, 10:31 am, "Ben Voigt" <r...@nospam.nospamwrote:
"AM" <abhi.me...@gmail.comwrote in message
>news:11**********************@n59g2000hsh.googleg roups.com...
I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
I am suggesting looking at the documentation for C# fixed-size buffers
which
is here:http://msdn2.microsoft.com/en-us/lib...ya(VS.80).aspx
A dynamic (.NET) array carries additional stuff with it like length.
Additionally, since .NET arrays are ref class, only a pointer is stored
in
the structure. This is totally different from the layout used by the C++
structure definition you gave.
On Apr 18, 2:01 pm, "Ben Voigt" <r...@nospam.nospamwrote:
"AM" <abhi.me...@gmail.comwrote in message
>news:11*********************@o5g2000hsb.googlegro ups.com...
Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the
following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
magically appeared?
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
No, that doesn't match. A dynamically resizeable array is not the
same
as
an inline array of size 4. Look for the 'fixed' keyword in the C#
help.
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M
Just so you guys know, I found a solution to the problem at the MSDN
forums. Here is a listing of the code
Code - header file
Header file
//Structure to store the result of the validation operation
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray[4]; //validity of each of the channel data -
causing the problems
};
extern "C" __declspec(dllexport) void __stdcall _validateData(double
dataToMat[], int time, validationResult *retval);
Code - CPP file
Cpp file
extern "C" __declspec(dllexport) void __stdcall _validateData(double
dataToMat[], int time, validationResult *retval)
{
retval->micDataValid = 10;
retval->rWaveValid =20;
retval->signalStatusArray[0] =1;
retval->signalStatusArray[1] =2;
retval->signalStatusArray[2] =3;
retval->signalStatusArray[3] =4;
return;
}
Code - C# code
Here is a listing of the C# code
class Program
{
unsafe struct validationResult
{
int micDataValid;
int rWaveValid;
fixed int signalStatusArray[4];
}
static void Main(string[] args)
{
validationResult res;
_validateData(dataToMat, 2,out res);
//assume dataToMat is an array with //
data already in it
}
}
----------------------------------
Thanks again.
On Apr 19, 1:41 pm, AM <abhi.me...@gmail.comwrote:
When I use the struct u suggested
unsafe struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
fixed int signalStatusArray[4]; //validity of each of the
channel
data
};
I get the following error.
Unable to find an entry point named '_validateData' in DLL
'CppMatlabWrapper.dll'.
This error goes away When i remove the array fro both the C++ and the
C# structs. So I think It has something to do with the way my array is
declared in the struct.
Thanks.
On Apr 19, 11:52 am, "Ben Voigt" <r...@nospam.nospamwrote:
"AM" <abhi.me...@gmail.comwrote in message
news:11*********************@b75g2000hsg.googlegro ups.com...
In that case what should my C# definition look like for the
corresponding C++ definition mentioned below?
C++ struct
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray[4]; //validity of each of the channel
data
};
C# (not compile tested)
unsafe struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
fixed int signalStatusArray[4]; //validity of each of the channel
data
};
or
struct validationResult
{
int micDataValid; //validity of the microphone data
int rWaveValid; //validity of the r Wave
int signalStatusArray_0; //validity of each of the channel data
int signalStatusArray_1;
int signalStatusArray_2;
int signalStatusArray_3;
};
Thanks
On Apr 19, 10:31 am, "Ben Voigt" <r...@nospam.nospamwrote:
>"AM" <abhi.me...@gmail.comwrote in message
>>news:11**********************@n59g2000hsh.google groups.com...
>I guess i did not copy my code correctly.
Here is what my C# struct looks like
public struct validationResult
{
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
//channel data
};
Are you suggesting that the the error is caused by my array definition
in C# is dynamic (because of the []), while my C++ array is of size 4?
>I am suggesting looking at the documentation for C# fixed-size buffers
>which
>is here:http://msdn2.microsoft.com/en-us/lib...ya(VS.80).aspx
>A dynamic (.NET) array carries additional stuff with it like length.
>Additionally, since .NET arrays are ref class, only a pointer is stored
>in
>the structure. This is totally different from the layout used by the C++
>structure definition you gave.
On Apr 18, 2:01 pm, "Ben Voigt" <r...@nospam.nospamwrote:
>"AM" <abhi.me...@gmail.comwrote in message
>>news:11*********************@o5g2000hsb.googlegr oups.com...
Hi,
I have a C++ Dll that has a function that is being exported as
shown below
extern "C" __declspec(dllexport) validationResult __stdcall
_validateData(double dataToMat[], int time);
A structure is defined in the header(.h file) as shown below
struct validationResult
{
int rWaveValid; //validity of the WAVE
int signalStatusArray[4]; //validity of each of the channel data -
'causing the problems'
};
I need to call the above method from C# in where i have the
following
structure defined
public struct validationResult
{
public int micDataValid; //validity of the microphone data
>magically appeared?
public int rWaveValid; //validity of the r Wave
public int[] signalStatusArray; //validity of each of the
channel data
>No, that doesn't match. A dynamically resizeable array is not the
>same
>as
>an inline array of size 4. Look for the 'fixed' keyword in the C#
>help.
};
And my function call is as shown
validationResult res = new validationResult();
res.signalStatusArray = new int[4];
res = _validateData(dataToMat, 2);
When the last line is reached i get an exception that says"Method's
type signature is not PInvoke compatible"
What am I doing wrong.
I know the issue is at the array inside the struct, as when I remove
the array from the C++ struct and the C# struct I get the right
response.
Thanks in Advance.
abhi M
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context I'm working on, ie.: I could use it...
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by: Angel |
last post by:
I'm exporting (with DllImport) a C-style function with this syntax:
int z9indqry (4_PARM *parm);
4_PARM is a structure declared in a proprietary header file that cannot be
included in my...
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by: Yourko |
last post by:
Hi there! I`me currently trying to write some simple programs in C.
For one such program i created globals.h file. In that file i defined a structure of type _client, and a pointer of that type:
...
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by: Bryan Parkoff |
last post by:
I hate using struct / union with dot between two words. How can I use
one word instead of two words because I want the source code look reading
clear. three variables are shared inside one...
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by: pete142 |
last post by:
Hi folks --
I have a 4-long array t of
of struct Targets. And a table of
int * in p. I need to set up
the int * entries in p such
that each can reference an int
in any member of the Targets t...
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by: =?Utf-8?B?U2hhcm9u?= |
last post by:
I'm exporting a COM interface from my C# application.
I want to to export a function that will have an array argument of structs.
The struct is like:
public struct MyStaruct
{
int A;
int...
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by: arnuld |
last post by:
I am passing an array of struct to a function to print its value. First
I am getting Segfaults and weired values. 2nd, is there any elegant way to
do this ?
/* Learning how to use an array...
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by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
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by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new...
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