Array of structure

can i declare a structure as in C language, then to use it as an array.....
but this time i want to use java....
how can this be done...
let say my structure have studid and age,
i want my array to be of size 3....
pls help

i mean....
i want to declare a structure with studid and age in
it......
then i want this structure to an array of size 3...can
this be done??
how can this be done??Java has no notion of structures, which is understandable, since Java is an object-oriented programming language, hence there is no need for those. You can, however, use classes as structs. For example:
class MyStructure {
   public int age;
   public int studid;
}Then you could refer to that as you would refer to a structure (of course you would have to create an instance first).
MyStructure[] struct = new MyStructure[3];
for(int i = 0; i < 3; i++)
    struct[i] = new MyStructure();
// Then you can use the structure
struct[0].age = 22;
struct[1].age = 47;
struct[2].age = 33;Tuomas Rinta

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Loops in arrays or structures

Loops in arrays or structures
I was given a project on html reports and
They have advised me to use Loops in arrays or structures
At this point I am a novice at this html reporting system. I
would like to know how I can use loops in arrays or structures.
How is it beneficial are
1. Structures
2. Arrays
3. loops in for both
for my reports.
Countless thanks in advance

Structures are great if you understand them, they are
basically just arrays organized by keywords rather than index
numbers.
Arrays are very nice, as you can just run through loops to
access each element, as they are all indexed by numbers 0-x.
loops are great to navigate through both. All you have to do
is set an loop to run through x amount of iterations of the array
or structure (where x is the length of the array, or number of
elements in the structure). Loops are great due to the small amount
of code they require.

How to create an array of structure which the structure contain an array(s)

im very new to java, and new here
i searched many websites, but i cant find it
it looks like this,
there is 10 employees, each of them has 0-5 children,
what i want is,
peter alan joseph
|?????????????????|???????|??????????????
| |????????| |??????| | |?????| |
| | andrew | | alvin | | | john | | ...........................
| |________| |______| | |_____| |
| |
what i know is,
import java.util.*;
class main{
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sen,
my lecture[r] said no statement in classEither you misundetstood your lecturer [probable]; or your lecturer is full of shit [possible].
is "String[] children = new String[5]" a statement ?Yes, it is.
she said we can only declare like "String[] children;" in classEither you misundetstood your lecturer ...
There's nothing actually wrong withclass Employee{
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}But it has the inherent limitation that you can't put the fathers name on the 6'th child's birth certificate... because the dumb computer won't let you... Hence it is poor practice.
A better implementation would be:class Employee{
    private List<String> children = new ArrayList<String>();
}because it doesn't impose an artificial limit on the number of kids a bloke can have.
keith.

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Is there a way to pass an array or structure for example as parameters, in addition to a query, or multiple queries to the Report Builder in CF8? I believe this was recommended by users to be in CF8.

BrianO,
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</CFReport>
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HTH
Swift

How to pass a structure/array of structure as input parameter in a webservice

Hi Team,
I am trying to create a webservice in powerbuilder .net( pb 12.5.1) . As this webservice will be used by external world to access some of data on basis of some input paarameter.
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I am assuming this is the same for .Net but in Classic you can create NVO's with Instance Variables and then reference them in the NVO that will be used as the parameter for the Public WebService.
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Calling Code Example:
integer    rc, liNdx
string     lsReturn
SoapConnection lSoapConnect
proxy_testing px_Testing
lSoapConnect = CREATE SoapConnection
if IsValid(lSoapConnect) then
TRY
rc = lSoapConnect.CreateInstance(px_Testing, 'proxy_testing')
CHOOSE CASE rc
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The suitable LabVIEW data type correspinding to the array of structure in Visual Basic ActiveX DLL

Hi!
I need to call a VB ActiveX DLL from LabVIEW. When I run my LabVIEW code, I always meet an error as:
Error 1 occurred at Incorrect Function in T06.vi
Possible reasons:
LabVIEW: An input parameter is invalid.
I have read the VB DLL code that defines the data type. It fills data to a structure, then puts this structure to the array, and sends the array of structures to the method.
VB Code:
For I = 1 To 31
Set MyInputData(I) = New EM_nkd_DataPoint
Next I
With MyInputData(1)
.Amplitude = 8.44
.DataPointType = R_HW
.DataSource = MEASURED
.Wav
elength = 409.56
End With
With MyInputData(2)
.Amplitude = 91.60113
.DataPointType = T_SUB
.DataSource = MEASURED
.Wavelength = 409.56
End With
~~~
With MyInputData(31)
.Amplitude = 91.96825
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My problem is that I can’t find a suitable kind of data type in LabVIEW which is corresponding to this case
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Many thsnks.
TX
Attachments:
T07.vi ‏166 KB

Hi,
if you have a complete source code including EM_nkd_DataPoint class module, take a look inside in order to see data types for Amplitude, DataPointType, DataSource and Wavelength (probably for Amplitude and Wavelength is SINGLE). If this code is not available, maybe the author mentioned a type for T_SUB and MEASURED even if they are constants.

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I'm looking to write a Oracle stored procedure where I would pass in an array of structures and loop over each iteration to insert the bits and pieces within the structures to the DB.,
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Folks - I've been trying to create an array of structures,
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vs
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Thanks!
************* Sample (1) **************
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<CFSET sCust.validEmailSource =
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<CFSET sCust.authKeyword
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<CFSET sCust.authKeywordLoc =
#rsMailAuth.tcEmailKeywordLoc#>
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<CFLOOP INDEX = "i" FROM="1" TO="5" >
<cfset strTest
= structNew() >
<cfset strTest.id = i>
<cfset strTest
.name = "[email protected]">
</CFLOOP>
<cfoutput>#arrayLen(strTest)#</cfoutput>

Sorry - simple english...
I am collecting a series of emails from a pop email server.
As I parse these into the individual parts (subject, body, from,
etc) I want to stuff them into a structure. each email would be a
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myStructure.from[2] or myStructure[2].from.
I know there are lots of ways around this, I just have a
natural predisposition to use structures when possible as it makes
it easier for me to keep track of things and makes it easier to
follow the code.
I can make either of these work, I'm just not sure if they
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Passing array of structures back to java from c

I have a DLL in C that I'm calling from a Java servlet. The C DLL creates a bunch of arrays of structures that I would like to be able to bring back to the Java servlet and process further. How difficult is this and does anyone have anywhere to point me that shows how it can be done?

1. In general, java knows nothing about structures. So you have to define eqquivalent java classes, and write code to move the data from C structs into the classes.
2. JNI supports definition of arrays of objects, which can be passed back from the dll.
You may find some code generators that will help you with the
CStruct->JavaObject definition. This may be a blind alley, but check out JACE.

Assign global array of structures of structures of std strings in a dll

I have a dll which consists of three c files. Find bellow the c file of the loader and the three files of the dll. In dll, file 1 and file 2 are almost identical, static arrays names and sizes, structure names, Prepare_1() and Prepare_2() functions. There
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I couldn't strip down even more the sample code because small changes make the problem disappear without, I'm afraid, really solving the problem. That's why I have put so much code here, I'm not even sure what is relevant and what not. For example, if I add
in file 1 in the StructStatus the extra member u32ExitPoint (and, of course, I modify Status_Init accordingly), I don't see the problem anymore.
///////////////////////////////////////////////////// loader file begin ////
#include "stdafx.h"
int main(int argc, char* argv[])
{ HINSTANCE hDLL = LoadLibrary( DLL_FQN_FILE_NAME );
if( void ( * pCreateDllInterface )( void ) =
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FreeLibrary( hDLL );
///////////////////////////////////////////////////// loader file end //////
///////////////////////////////////////////////////// dll main file begin //
extern void Prepare_1( void );
extern void Prepare_2( void );
extern "C" _declspec(dllexport) void CreateDllInterface( ) { Prepare_1(); }
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///////////////////////////////////////////////////// dll file 1 begin /////
#include <string>
#include <sys/stat.h>
#define STORAGE_SIZE 254
typedef unsigned long int uint32;
struct StructFileInfo
{ std::string Name;
struct stat FileStatus;
static struct StructStatus
{ bool bDownloaded; bool bDownloadedLast;
bool bCalled; bool bCalledLast;
uint32 u32EntryPoint;
StructFileInfo FileInfo;
} MuxStatusMain[ STORAGE_SIZE ], MuxStatusSupl[ STORAGE_SIZE ];
void Prepare_1()
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memset( &Stat_Init, 0, sizeof(struct stat) );
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{ false, false, false, false, 0, { "", Stat_Init } };
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MuxStatusSupl[ u32Idx ].FileInfo.Name = ""; // crash when u32Idx==3
///////////////////////////////////////////////////// dll file 1 end ///////
///////////////////////////////////////////////////// dll file 2 begin /////
#include <string>
#include <sys/stat.h>
#define STORAGE_SIZE 254
typedef unsigned long int uint32;
struct StructFileInfo
{ std::string Name;
struct stat FileStatus;
static struct StructStatus
{ bool bDownloaded; bool bDownloadedLast;
bool bCalled; bool bCalledLast;
uint32 u32EntryPoint; uint32 u32ExitPoint;
StructFileInfo FileInfo;
} MuxStatusMain[ STORAGE_SIZE ], MuxStatusSupl[ STORAGE_SIZE ];
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I get the crash with the message: Unhalted exception at 0x10001f90 in Test.exe: 0xC0000005: Access violation writing location 0x1006d320
Another strange phenomena is that in watch window, expressions
sizeof(MuxStatusMain)/sizof(MuxStatusMain[0])
sizeof(MuxStatusMain)/sizof(MuxStatusMain[0])
show both a value of 232 instead of 254 (but if I add in file 1 in the struct the missing member they show the correct values). On the other hand, if I printf those values, they are correct, 254.

"Another difference is that the structure StructStatus in file 2 has an extra member compare to file 1."
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Array of (structure) as a parameter in CORBA and JAVA

Hii
i have created a structure in the (interface )IDL file in CORBA program,
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In your idl file you need to define a sequence of your structure
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SUPStorage api in SUP 2.1 to store array or structure

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Rohit

Have you tried converting the array/structure to a string using JSON (or some similar technique) and storing it that way?

Make unique array of structure

Hi all.
How can make array of unique elements ?
Heed to get from array -> array1
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<cfset array[ 2 ] = { id = '1' } />
<cfset array[ 3 ] = { id = '1' } />
<cfset array[ 4 ] = { id = '2' } />
<cfset array[ 5 ] = { id = '3' } />
<cfset array[ 6 ] = { id = '4' } />
<cfset array[ 7 ] = { id = '4' } />
<cfset array[ 8 ] = { id = '5' } />
<cfdump var="#array#" label="Current" />
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<cfset array1[ 2 ] = { id = '2' } />
<cfset array1[ 3 ] = { id = '3' } />
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<cfdump var="#array1#" label="Needfull" />

There are a few 'tricks' that you can use here ...
A "struct" is fundamentally an associative-array structure. So, if you've got an "id" field of any sort, a struct can locate any "id" almost instantly. This is much faster than searching an array (which has a hidden cost created by virtual-memory paging over a large "footprint").
When you add a struct to another struct or to an array, you are actually moving a reference to the structure. You should find that (afaik!), if the struct is present both in an array and in a struct, both of these are references to one-and-the-same memory block.
Use the most-convenient data structure when building the original set of records. This is probably going to be a "struct." If you then need to have an array of elements sorted in a particular way, build that array last, by using a "sort" operation to arrange the records in whatever order you want. Since you'are actually (afaik...) moving references, you're not stomping on too much RAM.
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Returning array of structures

Hello All,
I defined a view in my application. This view comprises of a structure
containing an integer and char[].
I my application, I created an array of this structure and populated it.
I return the pointer to the array of the structure in the tpreturn call.
on the client side, I can see that only the first element of the array
is retrievable. The rest is junk data.
Why did the other elements did not come?
when populating the data in the array I do a userlog in the loop and I
can see that each element of the array was populated.
Why am I not able to send the entire array to the client side?
thanks for your help.
regards,
Abhishek.

Abhishek,
Make sure that you are using the exact C structure that was produced by the View
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Can you post your .v file, and the .h it generated?
If you need to transmit an array of the entire structure, you can use embedded
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Abhishek Srivastava wrote:
Hello All,
I defined a view in my application. This view comprises of a structure
containing an integer and char[].
I my application, I created an array of this structure and populated it.
I return the pointer to the array of the structure in the tpreturn call.
on the client side, I can see that only the first element of the array
is retrievable. The rest is junk data.
Why did the other elements did not come?
when populating the data in the array I do a userlog in the loop and I
can see that each element of the array was populated.
Why am I not able to send the entire array to the client side?
thanks for your help.
regards,
Abhishek.

Array of structure

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