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Re: structure to file

goldenrose917-Feb-11 5:30

goldenrose9

17-Feb-11 5:30

on using

st.code = 1;
st.st.Age = 25;
_tcscpy_s(st.st.Name, sizeof(st.st.Name), TEXT("WILLIAMS"));
_tcscpy_s(st.st.Address, sizeof(st.st.Address), TEXT("BB-33 LANE 5"));

following error occurs.

Error	1	error C2039: 'st' : is not a member of 'Student'	
Error	2	error C2228: left of '.Age' must have class/struct/union

Some Day I Will Prove MySelf :: GOLD

Re: structure to file

David Crow17-Feb-11 7:13

David Crow

17-Feb-11 7:13

I just compiled your code with my changes. It compiled and ran fine.

"One man's wage rise is another man's price increase." - Harold Wilson

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Re: structure to file

goldenrose917-Feb-11 7:17

goldenrose9

17-Feb-11 7:17

please give a sample so that i can understand my mistake.

Some Day I Will Prove MySelf :: GOLD

Re: structure to file

Alain Rist16-Feb-11 11:41

Alain Rist

16-Feb-11 11:41

Hi,

goldenrose9 wrote:
when executing this code following error occurs.

When compiling is not when executing.

1 You do not correctly initialize your st structure, change to:

Student
    st = {{TEXT("Williams"), 25, TEXT("B-33 Lane 5")}, 1 },
    read = {0};

2 Your code will then compile but not to your expected result, you must set the file pointer to FILE_BEGIN before reading:

WriteFile(hFile,&st,sizeof(Student),&BytesWritten,0);
SetFilePointer(hFile, 0, 0, FILE_BEGIN);
ReadFile(hFile,&read,sizeof(Student),&BytesRead,0);

cheers,
AR

When the wise (person) points at the moon the fool looks at the finger (Chinese proverb)

Re: structure to file

Richard MacCutchan16-Feb-11 21:28

Richard MacCutchan

16-Feb-11 21:28

st.detail.Name = TEXT("Williams");

You cannot copy characters in this way, you must use one of the copy methods.

I must get a clever new signature for 2011.

Re: structure to file

jk chan16-Feb-11 6:22

jk chan

16-Feb-11 6:22

Student st;
WriteFile(file,&st,sizeof(st),&written,0);
open file using Createfile API,

or you can use fopen("file","wb"); and fwrite C run time APIS.

is it so complicated? Smile | :)

If u can Dream... U can do it

Re: structure to file

goldenrose916-Feb-11 7:04

goldenrose9

16-Feb-11 7:04

jk chan wrote:
you can use fopen("file","wb"); and fwrite C run time APIS.

is it so complicated?

i know how to read and write using fread and fwrite. But i want my program to use WriteFile() and ReadFile()

Some Day I Will Prove MySelf :: GOLD

Return data when using SendMessage

manchukuo16-Feb-11 5:56

manchukuo

16-Feb-11 5:56

Hi there.

I am currently using a worker thread that communicates to the main thread using a call to sendmessage everything works great but now i need to return a string from that sendmessage handler to my worker thread. How can i return data from there, is it possible?

Thanks

Re: Return data when using SendMessage

Richard MacCutchan16-Feb-11 6:19

Richard MacCutchan

16-Feb-11 6:19

Send a pointer to a buffer in the lParam parameter, so the called function can store data in it. However make sure the buffer is big enough to receive the response. Alternatively you could use a shared buffer and protect it with locks.

I must get a clever new signature for 2011.

Re: Return data when using SendMessage

manchukuo16-Feb-11 6:22

manchukuo

16-Feb-11 6:22

Yeah the first solution you tell about was the one i was using but i though it was ugly and not a good practice but it worked, i passed a CString pointer, but the 2nd solution you post how could it be implemented?

Thanks

Re: Return data when using SendMessage

Richard MacCutchan16-Feb-11 21:26

Richard MacCutchan

16-Feb-11 21:26

manchukuo wrote:
but the 2nd solution you post how could it be implemented?

See here[^] for some suggestions on how to implement sharing information between threads.

I must get a clever new signature for 2011.

setDllDirectory in x64 project

zon_cpp16-Feb-11 2:16

zon_cpp

16-Feb-11 2:16

Hi,
how can i use SetDllDirectory function in my project, to compile in x64 configuration manager platform?
define _WIN32_WINNT as 0x0502 ???? where i define it?

Zo.Naderi-Iran

Re: setDllDirectory in x64 project

Richard MacCutchan16-Feb-11 2:39

Richard MacCutchan

16-Feb-11 2:39

zon_cpp wrote:
how can i use SetDllDirectory function in my project

See here[^] for details.

zon_cpp wrote:
define _WIN32_WINNT as 0x0502 ???? where i define it?

This should be added to your pre-compiled or main header file before the #include <windows.h> entry.

I must get a clever new signature for 2011.

Accessing web service in native C++ application

vipin_nvk16-Feb-11 0:11

vipin_nvk

16-Feb-11 0:11

I need to access a .NET web service in a native C++ application. People have suggested to use gSOAP (which is costly for a commercial license) and I have found articles where the same can be done using SOAP tool kit (which is no longer supported by microsoft)

To use SOAP toolkit method MSXML should be installed on the PC, and ours is a portable application we cannot afford it. I looked at other alternatives and found the following article - http://support.microsoft.com/kb/908574[^] But I am getting the following errors:

error C2065: 'IHelloWorldPtr' : undeclared identifier
error C2146: syntax error : missing ';' before identifier 'ptrHW'
error C3861: 'ptrHW': identifier not found
error C2065: 'ptrHW' : undeclared identifier
error C2227: left of '->SayHelloWorld' must point to class/struct/union/generic type

I am new to COM and .NET can somebody help to resolve the issue. And is this approach the write way to access .NET web services?

Thanx in advance

Re: Accessing web service in native C++ application

ShilpiP16-Feb-11 0:31

ShilpiP

16-Feb-11 0:31

Please don't re-post your question.

I believe in LOVE AT FIRST SIGHT...
Bcoz I have loved my Mother...
even since I opened my eyes...(ICAN)

Same Resource IDs in resource.h

Anu_Bala15-Feb-11 20:07

Anu_Bala

15-Feb-11 20:07

Hi im creating cotrols for various dialogs in my applcaition.So for each control one ID will create in resource.h .Sometimes waht happened same numeric ID is assigned to two differnt reource.It happens many of the time.
How can i avoid that?
Because of this i cannot add the resource to accelerator to assign fucntion.Every time when i add it shows resource id already exists..

Example:

#define IDC_STATE0OP 1171
#define ID_CLRPAGE 1171

#define IDC_BUTTON3 1173
#define ID_ALRMDETAIL 1173

#define IDC_ACKBUTTON 1175
#define ID_BLOCKDET 1175

Pls help me to sort out this problem.

Anu

Re: Same Resource IDs in resource.h

Hans Dietrich15-Feb-11 21:10

Hans Dietrich

15-Feb-11 21:10

Menu and taskbar IDs (for example, ID_CLRPAGE) by convention are assigned numbers greater than 32771. How did ID_CLRPAGE and ID_BLOCKDET get assigned their values in the first place?

If you used the VS resource editor, it will automatically assign the values, and it will use the lines at the bottom of resource.h that look like:

// Next default values for new objects
// 
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        131
#define _APS_NEXT_COMMAND_VALUE         32771
#define _APS_NEXT_CONTROL_VALUE         1041
#define _APS_NEXT_SYMED_VALUE           104
#endif
#endif

These lines tell the resource editor what the next available value is, so there won't be collisions.

Best wishes,
Hans

[Hans Dietrich Software]

Re: Same Resource IDs in resource.h

ThatsAlok15-Feb-11 21:12

ThatsAlok

15-Feb-11 21:12

See everything is in your resource file only, if you see these macro/decalartion govern the numbering of controls

#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS

#define _APS_NEXT_RESOURCE_VALUE	129
#define _APS_NEXT_CONTROL_VALUE		1000
#define _APS_NEXT_SYMED_VALUE		101
#define _APS_NEXT_COMMAND_VALUE		32771
#endif
#endif

check and correct there next count

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
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Re: Same Resource IDs in resource.h

Anu_Bala15-Feb-11 21:46

Anu_Bala

15-Feb-11 21:46

In my resource.h it shows like

#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        252
#define _APS_NEXT_COMMAND_VALUE         33078
#define _APS_NEXT_CONTROL_VALUE         1140
#define _APS_NEXT_SYMED_VALUE           115
#endif
#endif

Here how can i change..Can u gice ay idea?

Anu

Re: Same Resource IDs in resource.h

chevu15-Feb-11 22:01

chevu

15-Feb-11 22:01

Make sure that
1. all the resourses ids (like dialog) that are being used in these files are less than _APS_NEXT_RESOURCE_VALUE
2. all the control ids (i.e. button, textbox) are less than _APS_NEXT_CONTROL_VALUE value.
3. all commands (keyboard shortcuts) you have added should less than _APS_NEXT_COMMAND_VALUE

Hope it will solve your problem.

Re: Same Resource IDs in resource.h

ThatsAlok15-Feb-11 22:52

ThatsAlok

15-Feb-11 22:52

Hi Anu,

Sometime VS misbehave while assigning ids. i believe either try installing latest SP for you visualstudio or manually change all the ID's.

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: Same Resource IDs in resource.h

Anu_Bala15-Feb-11 22:54

Anu_Bala

15-Feb-11 22:54

Yes,i did like that.I changed the IDs manually.

Anu

Array Issue.

Mike Certini15-Feb-11 19:13

Mike Certini

15-Feb-11 19:13

I put together a program that takes a list of numbers in an array and sorts them by copying out of the first array into a second array when the value in the first array matches the maximum array element in the first array. What I cannot figure out is why when I look at the array elements saved in the final array there is a skip in element #10 to #11. In other words the second array correctly saves nine 10's and then skips element #10 and then saves the 9's starting in element #11.

#include <stdio.h>
#include <stdlib.h>
#define LIMIT 100

int roll[100];
int fin[100];
int num = 0;


int main(void)
	{
	int cyc = 0;
	int top = 0;
	int rotate = 0;
	int seek = 0;
	int loop = 0;
	int temp = 0;
		
	while(num < LIMIT)
		{
		roll[num] = rand() % 10 + 1;
		printf("%i",roll[num]);
		printf("\n");
		num++;
		}
	
	for(cyc = 0; cyc < num; cyc++)
		{
		if(roll[loop] > roll[loop+1] && roll[loop] > temp)
			{
			temp = roll[loop];
			}
		loop++;
		}
	
	for(cyc = 0; cyc < num; cyc++)
		{
		loop = 0;			        //Zero loop for second number to be evaluated
		while(loop < num)	                //Go through entire list
			{
			if(roll[loop] == temp)	        //Evaluate whether item matches maximum number
				{																			
				fin[cyc] = roll[loop];	//Copy item in the first array into the final array.
				cyc++;			//Increment cycle by 1.
				}
			loop++;				//Increment loop to pass through entire list.
			}
		temp--;					//Decrement number to be evaluated.	
		}
	}

Solution To Array Issue.

Mike Certini15-Feb-11 20:07

Mike Certini

15-Feb-11 20:07

Posted on different site:

You are incrementing cyc unnecessarily in your for loop when you are copying.

try this

for(cyc = 0; cyc < num;)

or a while loop

cyc=0;
while(cyc < num)

Re: Array Issue.

User 742933815-Feb-11 20:07

User 7429338

15-Feb-11 20:07

In the second for-loop, you increase cyc in the if-statement. It's no longer necesary to also increase it in the loop:

for(cyc = 0; cyc < num;){
    loop = 0;                   //Zero loop for second number to be evaluated
    while(loop < num){               //Go through entire list
        if(roll[loop] == temp){         //Evaluate whether item matches maximum number
            fin[cyc] = roll[loop];      //Copy item in the first array into the final array.
            cyc++;              //Increment cycle by 1.
        }
        loop++;                 //Increment loop to pass through entire list.
    }
    temp--;                     //Decrement number to be evaluated.
}

modified 13-Sep-18 21:01pm.

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