C / C++ / MFC Discussion Boards

Flame12316-Dec-04 1:05

16-Dec-04 1:05

Hi I need alot of help in trying to do this coursework. Can anyone give me help in this. here what is to be done.

The system he requires is very simple; he needs to have the ability to renew the membership of existing clients, to enrol new clients and to generate letters to remind clients whose membership is about to lapse

The progam should:

define appropriate user-defined data types (enumerations and/or structs) to model the data of the application.
read the client data from the data file and store it in a convenient form.
enrol new clients.
renew membership of clients.
perform a search through the data for clients whose membership is about to run out and generate a reminder letter.
save the client data to a data file.

I have tried to attempt it but never got past the first stage.

Cheers

Re: Coursework Help

David Crow16-Dec-04 4:18

David Crow

16-Dec-04 4:18

Flame123 wrote:
I have tried to attempt it but never got past the first stage.

Show us the code you do have and we can probably steer you in the right direction.

Where is the membership information stored?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: Coursework Help

Anonymous16-Dec-04 4:38

Anonymous

16-Dec-04 4:38

I dont have the coding at the moment its in uni but i think the membership information is stored on a txt file not sure about that.

Re: Coursework Help

David Crow16-Dec-04 5:33

David Crow

16-Dec-04 5:33

Anonymous wrote:
I dont have the coding at the moment its in uni...

We'll wait patiently...

Anonymous wrote:
...i think the membership information is stored on a txt file not sure about that.

Good. That will make your code much easier than having to mess with a database or some other complicated file structure. Can I assume the structure of said file is formatted something along the line of:

client #:signup date:expire date

with ':' delimiting the three fields?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: Coursework Help

Flame12316-Dec-04 6:50

Flame123

16-Dec-04 6:50

Ok I managed to get the coding. Phewww This is what i have done so far but i have no idea how to finish it off according to the requirements. i still need to

one to open a file for writing
one to determine if a client already exists
one to create a new client
one to calulate days remaining in membership
one to generate a reminder letter
one to write to and close the file

Could u help me finish this off. Where it says Here is choice i haven't finished validating that bit cos i am still testing to see if it all works. here is the coding:

struct Member {
string member_name;
string member_emailaddress;
int membership_days_reamaining;
};

int main(void)
{
int user_choice; //will be the user's choice of menu item
user_choice = runMenu(); \\gets the choice by running a function
while(user_choice != 6) \\loops until user quits
{
doStuff(); \\this will be the function to perform manipulations
user_choice = runMenu(); \\reloads the user choice
}
return 0; \\end of driver
}

}
int runMenu() \\displays menu and returns user choice
{
int ret_value;
cout<<"Here is choice 1"<<endl;
cout<<"here="" is="" choice="" 2"<<endl;
="" 3"<<endl;
="" 4"<<endl;
="" 5"<<endl;
="" cout<<"hit="" 6="" to="" quit"<<endl;
="" cout<<"please="" pick="" one"<<endl;
="" cin="">> ret_value;
return ret_value;
}

Re: Coursework Help

David Crow16-Dec-04 7:33

David Crow

16-Dec-04 7:33

Flame123 wrote:
one to open a file for writing

I think you would use ofstream for this.

Flame123 wrote:
one to write to...the file

Use the insertion (<<) and extraction (>>) operators for this.

Read the entire file into a heap-based structure.

Flame123 wrote:
one to determine if a client already exists

Search the structure.

Flame123 wrote:
one to create a new client

Add to the structure.

Flame123 wrote:
struct Member
{
...
int membership_days_reamaining;
};

I don't know that it is such a good idea to store "days remaining" in the file. This would require constant updating of the file based on some "reference date." It would be better to store the reference date and if the difference between that and the current date exceeds some number (e.g., 180 days), print a reminder letter. Or, when the person enrolls, you know they are paying for a certain period of time (e.g., six months) so you could also write the expire date to the file. Then it would be a simple matter of iterating through the file and checking for all "expire dates" that are after the current date. Make sense?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: Coursework Help

Anonymous16-Dec-04 7:55

Anonymous

16-Dec-04 7:55

No!

Re: Coursework Help

Flame12316-Dec-04 8:07

Flame123

16-Dec-04 8:07

I understand but what you said i have no idea how to do. Frown | :(

Resizable treeview/listbox in a window

tintin7715-Dec-04 23:06

tintin77

15-Dec-04 23:06

Hi...

I'm quite new to win32 programming so don't dare to laugh with my questions Poke tongue | ;-P

I'm looking for a control that enables me to resize a treeview in a window at runtime. What I want to achieve is that a treeview can be resized by dragging the seperator between a treeview and a listbox, the same way as in Windows Explorer where you can resize the directorytree and the filelist.
Can I use a rebar for this? Or is this only meant for making toolbars resizable/removable?
I don't use MFC!

Re: Resizable treeview/listbox in a window

Maximilien16-Dec-04 0:18

Maximilien

16-Dec-04 0:18

who need to do it manually.

handle the WM_SIZE of the containing window to be able to MoveWindow the tree view.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Resizable treeview/listbox in a window

tintin7716-Dec-04 1:47

tintin77

16-Dec-04 1:47

I don't want to get my treeview and listbox resized when the containing window is resized.
I want to resize the treeview. In that case the WM_SIZE message isn't sent to the containing window.
I made the treeview resizable but then the user is able to resize it all over the containing window.

Re: Resizable treeview/listbox in a window

Blake Miller16-Dec-04 3:58

Blake Miller

16-Dec-04 3:58

You need to find a control that is similar to the MFC Spliiter Window (Maybe there is a common control like that) and then you embed it between your tree view and the other window to the right of the tree view. When the user moves the splitter window, then you use MoveWindow to reposition the tree view and the other control. The nice thing about the splitter windows is that they usually run horizontally and vertically, so you don't have to try to constrain a user's window positioning in one direction or the other. Also, if the user is allowed ot resize your main window, then you adjust the positions of all three controls (tree view, splitter, other control) when the window is don being positioned (I think you get WM_WINDOWPOSCHANGED when a window is done being moved).

List control - MFC

nemarc15-Dec-04 21:47

nemarc

15-Dec-04 21:47

I need to show a selection in a list control, but i also want to inhibit a selection by a mouse. If I use a "disalbled" property i'll have a gray background in a list control window. How can I inhibit a selection and also have a white background?

Thanks

pm

Re: List control - MFC

vikramlinux15-Dec-04 22:28

vikramlinux

15-Dec-04 22:28

Which application u are having ?
Dialog, SDI , MFC or ??

Something might be useful for u
For selecting an item:
Listbox Control : SetCurSel
ListView Conrtrol : SetItemState (plesae check out MSDN for verification)

For mouse events masking:
override DefWndProcedure
mask Windows mouse related messages...
this should work

Re: List control - MFC

nemarc15-Dec-04 22:39

nemarc

15-Dec-04 22:39

I'm using a dialog

picm

Re: List control - MFC

vikramlinux15-Dec-04 22:42

vikramlinux

15-Dec-04 22:42

and which Control exactly?

Re: List control - MFC

nemarc15-Dec-04 23:06

nemarc

15-Dec-04 23:06

A List Control (CListCtrl) with a "View" propety set to "Report"

picm

Re: List control - MFC

vikramlinux15-Dec-04 23:27

vikramlinux

15-Dec-04 23:27

U tried the soln I gave?

Re: List control - MFC

nemarc16-Dec-04 0:10

nemarc

16-Dec-04 0:10

I had already used SetItemState() before your suggestion. It works to selected an Item. I haven't yet used DefWndProcedure. I'll write about it.

thanks

picm

Re: List control - MFC

toxcct16-Dec-04 1:56

toxcct

16-Dec-04 1:56

i really wonder if you can read !?! (did you have a look at the subject of the thread ?) Sleepy | :zzz:

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Send byte Array from VB to C(VC)

pinhas15-Dec-04 20:01

pinhas

15-Dec-04 20:01

HI how to send Byte Array from VB6 to VC6

i nead to send MyArray() to new function in VC name CalcArray(.....MyArray)

how to send the Array

Thanks Pini

Re: Send byte Array from VB to C(VC)

Cedric Moonen15-Dec-04 21:29

Cedric Moonen

15-Dec-04 21:29

Is the array made of basic types? I mean like integers or float... ?
If yes, you can pass your array by reference (in VB).
It will look like this:

VB:<br />
Declare Function YourFunc Lib "YourLib.dll" (ByRef YourArray As Integer) As Integer

C++:<br />
int __stdcall YourFunc(int* pArray);<br />

(__stdcall modify the calling convention to be compatible with VB calling convention).

Re: Send byte Array from VB to C(VC)

pinhas15-Dec-04 22:15

pinhas

15-Dec-04 22:15

yes
but i need to implement the odl File:

[id(1)] long MyFunction( xxxxxxxxx );
[id(1)] HRESULT MyFunction([in] xxxxxxxx,[out, retval] long* retval);

and
DISP_FUNCTION(CODBAPICtrl, "MyFunction", MyFunction, xxxxxxxx, xxxxxxxxxx)

what i nead to insert in the "xxxxxxxx"

Thanks

answer me if you are american

includeh1015-Dec-04 19:51

includeh10

15-Dec-04 19:51

i will delete the post soon, things sound very strange, i just want to know if there are public holidays (excluding sat. and sun.) this week in america? if yes, how many days?

cheers

includeh10

Re: answer me if you are american

toxcct16-Dec-04 2:00

toxcct

16-Dec-04 2:00

I'M NOT AMERICAN? AN I ANSWER YOUR POST? EVEN IF YOU DON'T WANT !!!!!!

this is not the place to ask such things...
you have the soapbox and the lounge if you have off topic questions....... Mad | :mad:

TOXCCT >>> GEII power
[toxcct][VisualCalc]

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