C / C++ / MFC

Re: Why wifstream can not read in numbers?

1-Nov-09 12:18

What do you see when you open the file manually?

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

transoft2-Nov-09 1:35

transoft

2-Nov-09 1:35

Hi
I can read in wide string. But I can not read numbers. I can get string by using "read" function. But I can not get anything back using operator ">>".

Thanks,

Re: Why wifstream can not read in numbers?

«_Superman_»2-Nov-09 4:06

Re: Why wifstream can not read in numbers? [modified]

2-Nov-09 4:06

I suspect the numbers as you mention are stored as strings in your file.
If it is stored as numbers, it should not make any sense when you open the file manually.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

transoft2-Nov-09 5:24

transoft

2-Nov-09 5:24

Yes, I saved them as numbers not string. It tried to read a binary file which has string and numbers. The string was saved as string and numbers is as numbers (not string).

Why wifstream does not read number only string?

How can I correct them?

Thanks,

modified on Monday, November 2, 2009 11:56 AM

Exit Message Box

MrMcIntyre1-Nov-09 8:56

1-Nov-09 8:56

Hi again,

Can someone be helpful and show me a link or a piece of code that allows me to insert into my code so when the user clicks the X button at the top of the client so a message box appear and says "Are you sure you want to exit" along with the event.

Thanks

Andrew McIntyre

«_Superman_»1-Nov-09 9:24

Re: Exit Message Box [modified]

1-Nov-09 9:24

Handle the WM_CLOSE[^] message for the window.
You can put your message box in this handler.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

MrMcIntyre1-Nov-09 9:33

1-Nov-09 9:33

switch (message)<br />
    {<br />
        case WM_CLOSE:<br />
        MessageBox(NULL, "Are you sure you want to exit?", "Exit", MB_YESNO | MB_ICONEXCLAMATION);<br />
        DestroyWindow(hwnd);<br />
        break;<br />
    }

Can someone help me find a missing identifier and show me where I have to put it.

Thanks

Andrew McIntyre

modified on Sunday, November 1, 2009 3:39 PM

«_Superman_»1-Nov-09 9:46

1-Nov-09 9:46

case WM_CLOSE:
    if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))
        DestroyWindow(hwnd);

    return 0;

For MFC it could look like this -

void CYourClass::OnClose()
{
    if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))
        DestroyWindow(hwnd);
}

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

MrMcIntyre1-Nov-09 9:57

1-Nov-09 9:57

Hi. I think I've done something wrong somewhere.

#include <windows.h><br />
<br />
//Global Definitions<br />
#define WINDOW_WIDTH 1040<br />
#define WINDOW_HEIGHT 750<br />
<br />
//Global Variables<br />
const char lpClassName[] = "My Project";<br />
HWND mainWindow;<br />
<br />
//Function Declarations<br />
LRESULT CALLBACK WindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);<br />
<br />
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)<br />
{<br />
	//Create The Window Class<br />
	WNDCLASSEX wc;<br />
	wc.style = CS_VREDRAW | CS_HREDRAW;<br />
	wc.lpszMenuName = NULL;<br />
	wc.lpszClassName = lpClassName;<br />
	wc.lpfnWndProc = WindowEvent;<br />
	wc.hInstance = hInstance;<br />
	wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);<br />
	wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);<br />
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);<br />
	wc.hbrBackground = (HBRUSH) GetStockObject(BLACK_BRUSH);<br />
	wc.cbWndExtra = 0;<br />
	wc.cbSize = sizeof(wc);<br />
	wc.cbClsExtra = 0;<br />
<br />
	//Register The Windows Class<br />
	RegisterClassEx(&wc);<br />
<br />
	//Create the Window<br />
	mainWindow = CreateWindowEx(<br />
		NULL,<br />
		lpClassName,<br />
		"My Project",<br />
		WS_OVERLAPPEDWINDOW | WS_VISIBLE,<br />
		(GetSystemMetrics(SM_CXSCREEN) / 2) - (WINDOW_WIDTH / 2),<br />
		(GetSystemMetrics(SM_CYSCREEN) / 2) - (WINDOW_HEIGHT / 2),<br />
		WINDOW_WIDTH,<br />
		WINDOW_HEIGHT,<br />
		NULL,<br />
		NULL,<br />
		hInstance,<br />
		NULL<br />
		);<br />
<br />
	//Make Sure The Window Was A Success<br />
	if (!mainWindow)<br />
		return 0;<br />
<br />
	//Update the Window<br />
	UpdateWindow(mainWindow);<br />
<br />
	//The Main Loop<br />
	MSG msg;<br />
<br />
	while (1)<br />
    {<br />
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))<br />
        {<br />
            if (msg.message == WM_QUIT)<br />
                TranslateMessage(&msg);<br />
            DispatchMessage(&msg);<br />
        }<br />
    }<br />
    return (int) msg.wParam;<br />
}<br />
//Callback Function (WindowEvent)<br />
LRESULT CALLBACK WindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)<br />
{<br />
    switch (message)<br />
    {<br />
        case WM_CLOSE:<br />
    if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))<br />
        DestroyWindow(hwnd);<br />
<br />
    return 0;<br />
        break;<br />
    }<br />
    return DefWindowProc(hWnd, message, wParam, lParam);<br />
}

Andrew McIntyre

«_Superman_»1-Nov-09 10:00

1-Nov-09 10:00

You really must do this on your own.
Change the first parameter of MessageBox from hwnd to hWnd.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

MrMcIntyre1-Nov-09 10:04

1-Nov-09 10:04

I got three compile errors:

'MB_YES' : undeclared identifier
'_T': identifier not found
'_T': identifier not found

Andrew McIntyre

MrMcIntyre1-Nov-09 10:48

1-Nov-09 10:48

Can someone help me with those errors.

Please

Andrew McIntyre

hxhl951-Nov-09 13:16

hxhl95

1-Nov-09 13:16

MessageBox Function()[^]

Look under the return value section for what you're looking for.

_T("") is a text macro, you can try TEXT("") if it's not defined. If both are undefined, just don't use it. (put function("text here") instead of function(_T("text here")))

David Crow2-Nov-09 2:58

David Crow

2-Nov-09 2:58

MrMcIntyre wrote:
if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))
DestroyWindow(hwnd);

hwnd has not been declared.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

MrMcIntyre2-Nov-09 10:52