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You need to initialize the ‘n’ variable, because if the first call to ‘scanf’ fails the value will still be undefined.
How you are using ‘scanf’ will only convert digits, otherwise it failes, and you should check the return value of the function to determine if it was successful.
Your ‘while’ will not exit until a value has been enter in the required range, so there is no reason to check after the loop has exited.
If you really want to verify each digit as it is entered, then you will need to gather the digits one at a time, in to a character buffer, and call ‘isdigit’ to check each character as it is entered. After gathering digits, use ‘atoi’ to convert it to ‘int’ and then check the range. (Do not forget to make sure the character buffer ends with character ‘\0’.)
Simplified version of your code:
void main()
{
int n = 0;
while(n < 0 || n > 100)
{
printf("Enter digit (0 to 100) > ");
scanf("%d", &n);
if(n < 0 || n > 100)
printf("Invalid! Reenter digits >\n");
}
}
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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I use App-Wizard to create project that derive from CEditView.(It look like NotePad).
My problem is that when the character have change by using the function for edit charactor such as CString::Delete(), CString::Insert()...
At menu Undo it isn't Active.
It look like, It don't know the character have change.
Can anyone help me for solve this problem?
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What function you are using to set text to edit control ?
Because, calling SetWindowText or SetHandle clears the Undo flag.
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Please tell me if you have another way to set text to EditCtrl
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Use ReplaceSel, in combination with SetSel.
Edit.SetSel(0,-1);
Edit.ReplaceSel("PRASAD",TRUE);
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use ReplaceSel instead.
This method replaces the current selection.
If you want to replace the whole text, use SelSel() before.
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Hi All ,
I am creating the SDI application for showing the Operating system’s drive explorer tree.
This is working fine for all operating system from Win 2K to XP for 32 Bit.
But If I check it for Windows XP 64 bit operating system then It is showing strange behave , my all hierarchy of files and folders is coming properly but Files and folder of C:\windows\system32 directory are not coming properly , here it is showing the files and folders of C:\windows\systemWOW64 directory.
How to show the actual files and folder of C:\\Windows\\system32 directory ????????
I am using the following code snippet.
ShowFileFolder (CString strPath )
{
HANDLE hInstance;
BOOL bContinue=FALSE;
WIN32_FIND_DATA fatr;
int iCheck=0;
int iLocation;
if(strPath.GetAt(strPath.GetLength()-1)!='\\')
strPath=strPath+_T("\\");
if(strPath.GetLength()==3)
iCheck=1;
strPath=strPath+_T("*");
hInstance=FindFirstFile(strPath,&fatr);
do
{
bContinue=FindNextFile(hInstance,&fatr);
if(!(wcscmp(fatr.cFileName ,_T("."))==0) && !(wcscmp(fatr.cFileName,_T(".."))==0) && bContinue)
{
if(fatr.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
if((iLocation=strPath.ReverseFind('*'))!=-1)
strPath=strPath.Left(iLocation);
ShowFileFolder (strPath);
//AddItemToTree(strPath) ;
}
else
{
if((iLocation=strPath.ReverseFind('*'))!=-1)
strPath=strPath.Left(iLocation);
//AddItemToTree(strPath) ;
}
}
}while(hInstance && bContinue);
FindClose(hInstance);
}
ShowFileFolder (“ C:\\Windows\\system32 ”) and ShowFileFolder (“ C:\\Windows\\systemWOW64 ”) showing the same file folder hierarchy but actually both have diff file folders on Windows XP 64 bit OS
Regards
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ashtwin wrote: my all hierarchy of files and folders is coming properly but Files and folder of C:\windows\system32 directory are not coming properly , here it is showing the files and folders of C:\windows\systemWOW64 directory
This is the correct behavior. Win64 virtualizes some parts of the file system and registry for Win32 apps for compatibility reasons. You can disable this feature by calling Wow64DisableWow64FsRedirection()
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Thanks it is working correctly now.
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Hi,
I need to add a UDP multicast ability to my application.
The problem is that i can send data to the other computers in my group,
but i can't get data from the other computers.
Where can I find a good example for UDP multicast?
I tried googling but can't find a good example.
With best regards,
Eli
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How are you trying to "get data from the other computers"?
Are they sending multicast packets as well?
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Dear All,
I want to stop user interaction with dialogs.
How can i do this ?
Thanks.
bye.
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What do you want to achieve ,exactly ?
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Hi.,
I am doing a remotly managable program. There I want to manage a dialog application that is at client side. Client application having some buttons, menu and all.
I want to disable application window interaction from user so as to user can not modify any changes on that application dialog.
But it shows the status or some stable text. thats it.
Bye.
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Sakthiu wrote: I want to disable application window interaction from user so as to user can not modify any changes on that application dialog.
But it shows the status or some stable text. thats it.
Whats problem then ? If you are showing information as text.
If you are worried about buttons to be clicked( I'm not sure, if they are there), you can always handle them.
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i have two questions.
1)I need to count the items in the list view.
in my project i opened the file dialog and that selected file is display in the
listview if the same file is selected it gives message of duplication of file.
2)i want to set the default value in combo box.
i am using win32 in .net enviorment.
thanks with ![Rose | [Rose]](https://codeproject.freetls.fastly.net/script/Forums/Images/rose.gif)
amit
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amitmistry_petlad wrote: 1)I need to count the items in the list view.
Use ,
SendMessage( (HWND) hWnd, LB_GETCOUNT, 0,0);
amitmistry_petlad wrote: 2)i want to set the default value in combo box.
I'm not sure, what you want to do ?
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thank you ,gives the count value zero when i debug it.
will it work for listview?
i am not sure but i think it is for listbox not for listview control.
because the listview has some columns so i think we have to find the column number first and then we have to count the items.is it?
do you have any artical on the base of list view count items ? or link?
amit
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amitmistry_petlad wrote: am not sure but i think it is for listbox not for listview control
Yes it is.
For list view , you can use,
SendMessage(hView,LVM_GETITEMCOUNT ,0,0);
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still gives the zero value, after adding files in the listview
here is the code
case CBN_SELCHANGE :
int iCheck = (int)SendMessage((HWND)GetDlgItem(hDlg , IDC_COMBO1 ), CB_GETCURSEL, (WPARAM)0, (LPARAM)0);
if(iCheck !=0)
{
if(iCheck != 2)
{
uploadedFile = util.GetFile(NULL);
}
else
{
uploadedFile = util.BrowserDirectory();
if(uploadedFile != "")
uploadedFile += "\\";
}
if(uploadedFile != "")
{
//Check if the item is already added or not
HWND hwndListbox = GetDlgItem(hDlg,IDC_LIST4);
LRESULT iCount = SendMessage(hwndListbox,LVM_GETCOLUMN,0,0);
bool valid = true;
if(iCount > 0)
{
for(int i=0;i<iCount;i++)
{
WCHAR szInputFile[MAX_PATH];
SendMessage(hwndListbox,LB_GETTEXT,i,(LPARAM)szInputFile);
if(wcslen(szInputFile) > 0)
{
string sIn = util.ConvertWCHARToString(szInputFile);
if(sIn == uploadedFile)
{
valid = false;
MessageBox(hDlg,_T("This item is already added to the list."),_T("Encode"),MB_ICONINFORMATION);
break;
}
}
}
}
amit
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amitmistry_petlad wrote: //Check if the item is already added or not
HWND hwndListbox = GetDlgItem(hDlg,IDC_LIST4);
LRESULT iCount = SendMessage(hwndListbox,LVM_GETCOLUMN,0,0);
It is lisbox , I guess. Then you need to use, LB_GETCOUNT wioth SendMessage.
Does list box contains some item ?
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no,no
please dont guess list box it is list view
dont go on the varibal names and MESSAGE
e.g
hwndListbox,LB_GETTEXT
it is listview dear.
amit
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amitmistry_petlad wrote: hwndListbox
Its really bad coding convention.Thats why I assumed it as list box.
I dont see any reason why ListView_GetItemCount should not work with list view, if it contains items.
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Dear prasad,
well i am new comer in the win32 programming so sorry for asking some stupid
questions.
ListView_GetItemCount(hwndListview);
is working but now there is problem with the fetching out string from the
listview's first 0 column.
1) for string it is not supported,
2)it might support for WCHAR but when i convert it into string its not convert into string it gives ? mark at debugging time.
code :
<br />
string Utility::ConvertWCHARToString(LPCWSTR source)<br />
{<br />
try<br />
{<br />
size_t len = wcslen(source) * sizeof(LPCWSTR);<br />
char* tempOutFile = new char[len];<br />
WideCharToMultiByte(CP_ACP,0,source,-1,tempOutFile,(int)len,NULL,NULL);<br />
@ the time of debugging<br />
string s = tempOutFile;<br />
if(tempOutFile)<br />
{<br />
delete[] tempOutFile;<br />
}<br />
return s;<br />
}<br />
catch(exception ex)<br />
{<br />
throw ex;<br />
}<br />
}<br />
<br />
3)so i have taken char buff[500],
for that it works fine, but when it convert into string(buff_input) it gives first char and terminate .
i also knew the reason for that i have remark when i had debug the code
in char buffer it show me the null(0) value after every character.
like e.g buff[0] | a
buff[1] | 0
buff[2] | b
buff[3] | 0
buff[4] | c
means @ all the odd position it gives me the null so the string will terminate
immidate after buff[1] so it shows first character only when convert into string
ListView_GetItemText(hwndListview,i,0,(LPWSTR)&buff,MAX_PATH);
std::string buff_input(buff);
which one is suitable (1),(2),(3)? give me the guide line master
-- modified at 9:19 Wednesday 27th December, 2006
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