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A quick web research brought some more infomation.
CFileDialog will change the current working directory which may lead to the locked directory. So you may try to also set the current working directory to something else (e.g. to another drive) before calling your delete function:
SetCurrentDirectory(_T("C:\\"));
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Hi Jochen,
Just done a quick check (I actually used _chdir) and that SEEMS to have fixed it. Hopefully, when I migrate these changes to my REAL code, it will stay fixed !
Many thanks to everybody who helped with this - wierd problem, eh ?
Doug
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Thank you for your feedback. _chdir will internally call SetCurrentDirectory.
A directory that is selected as current directory is treated like a file in use and can't be deleted. It seems that the file dialog selects the actually shown directory as the current one and does not change it back. There is an OFN_NOCHANGEDIR file dialog option to restore the original directory but that is ignored for opening files (only supported for the Save as dialog).
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Still learning how to code wrote: I picked up a function RecursiveDelete on the internet, as I needed to erase all files and folders on an SD card...
Why not just use SHFileOperation() with the FO_DELETE operation?
"One man's wage rise is another man's price increase." - Harold Wilson
"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
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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So I have a video stream of known resolution and I have a VR headset via HDMI at a known resolution.
Is there an existing library to create the slight fisheye and side-by-side layout for these headsets?
Target: Win 7/8/10
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I have a csv file. I want to load the csv fil to a database.
I tried by using CDAOSatabase instance with 'Microsoft Text Writer' jet enine.
( One Problem I found that when I execute a query to ceate a new table, the file equivalent to the new table is created in physical disk, even though I didn't commit the transaction)
Also I heard that in windows there will not be a 64bit 'Microsoft Text Writer' in winows 64 bit.
( In my spec there is no MSOffice installed separately on this winows 64 bit machine )
Could ou please let me know is there any solution to use 'Microsoft Text Writer' in Windows64 bit machine without Microsoft office installed.
aks
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Hello eeryone, I am Mark, am attending Foothill College in SOCAL and I am cmpletely new to all of this. I am having trouble with my first assignment, I will show you. I am on DEV C++ :
#include
using namespace std;
int main()
{
cout<< "Tran says this is her first computer program.";
}
{ -----------------------------------------
intmain()
cout<< "Tran says that.";
cout<< "this is her first computer program.";
cout<< "Tran says this is her first computer program.";
cout<< "Tran says that,";
cout<< "this is her first computer program.";
cout<< "Tran said that, "This is my first computer program."";
cout<< "Train said that,.";
cout<< ""this is my first computer program."";
cout<< "Tran said that,.";
""this is my first computer program."";
cout<< "Tran said that.";
cout<< ""this is my first computer program."";
}
This is what My teacher said :
Hi Mark,
You can only have "int main()" once in your program. Once you put the close curly brace to end it, you can't have any more code below that. If you take another look through the lesson and the textbook reading, you'll see that all of the examples follow that pattern.
The solution is to put all of the cout statements inside the first set of curly braces, so you don't need any additional curly braces.
Dave
Now, I did this here and this is what happened :
#include
using namespace std;
int main()
{
cout<< "Tran says this is her first computer program.";
cout<< "Tran says that.";
cout<< "this is her first computer program.";
cout<< "Tran says this is her first computer program.";
cout<< "Tran says that,";
cout<< "this is her first computer program.";
cout<< "Tran said that, "This is my first computer program."";
cout<< "Train said that,.";
cout<< ""this is my first computer program."";
cout<< "Tran said that,.";
""this is my first computer program."";
cout<< "Tran said that.";
cout<< ""this is my first computer program."";
}
This is what my computer said :
( I want to post the Pic, I cannot copy and paste it down.Can somone show me how topost pics on here ? Thanks, If I cannot then I will privately email you. )
So I did what the teacher said to do and then I compile and got more lines all messed up. I am confused...
Thanks
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Start simple. First have only one statement within main():
#include <iostream>
using namespace std;
int main()
{
cout << "Tran says this is her first computer statement." << endl;
return 0;
}
The above is the complete program. No other statements above and below these.
Then, upgrade the program to have two statements:
#include <iostream>
using namespace std;
int main()
{
cout << "Tran says this is her first computer statement." << endl;
cout << "Tran says this is her second computer statement." << endl;
return 0;
}
And then, go on progressively increasing the complexity.
Some compilers need the return 0 statement since your main is returning int.
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I get it, lets try that.
Nope it still wont compile..
Ill keep in touch and sow the tutor tommorow.
Thanks
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Looking at the actual source code in your question you have:
#include
using namespace std;
int main()
...
But the #include statement is incomplete. You must use that statement to include header files which define the various external classes/methods/functions etc, that you wish to use in your program. So, to use the cout command, you must include the header that defines the basic I/O stream classes thus:
#include <iostream>
See https://msdn.microsoft.com/en-us/library/zh80x809(v=vs.100).aspx[^] for more details.
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Hi
I have a method namely CAsyncSocket::OnSend and OnConnect that initially when I start my conversation get called in the context of the main thread
In the notification I do a Detach and PostThreadMessage to a CWinThread which does an attach of the socket
Now the notification routine return the same value for AfxGetApp and AfxGetThread when clearly the notification is received in the context of a UI CWinThread worker thread
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I have a CPropertysheet with several CPropertypage pages. Those normally look like:
job_update.png (18.9 KB)
libl_update.png (30.6 KB)
sched_update.png (18.1 KB)
However, on one specific system, the buttons on the right side of each page are missing:
job_update_2.png (14.6 KB)
libl_update_2.png (14.1 KB)
sched_update_2.png (13.9 KB)
I'm at a loss as to why. The machine has plenty of RAM, has been rebooted, and no other user programs are running. Since it looks fine on hundreds of other machines around the world, what could possibly be up with this one machine? I can't imagine it being a code issue, but that's not something you can tell a customer when they are the one it is happening to.
Thanks for any help.
DC
"One man's wage rise is another man's price increase." - Harold Wilson
"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
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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looks like the list control is sizing itself too large and is overdrawing the buttons. maybe that's related to the increased font size on the list control?
try changing your Windows font size?
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Why the compiler take
<h1>pragma comment(lib, "glut32.lib")</h1>
bot not
<h1>pragma comment(lib, "gl/glut32.lib")</h1>
it get me (on second trial):
LINK : fatal error LNK1104: cannot open file "glut32.lib"
It is not possible to have libs in other folders than main one ?
P.S. Of course that I have glut32.lib file on the right path, the problem become that is not recognize gl\glut32.lib path (however glut32.lib is there) !
modified 10-Jun-15 8:17am.
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You are using a relative path vs. an absolute path. A better approach is to just use "glut32.lib" in the #pragma statement, and have the linker configured to search the proper directory for the .lib file with the Additional Library Directories setting.
"One man's wage rise is another man's price increase." - Harold Wilson
"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
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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Yes, had worked. Thanks !
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class test
{
public:
CString str;
}
test oTest;
oTest.str = "abc";
When I try to write the above object 'oTest' to a simple file using fwrite and CFile and then try to read using fread, I am getting bad pointer in oTest.str
But when I replace the CString member with char array as "char str[50]" and try to write and read file, its working
So I want to know how to write and read a class object with CString member to and from a file
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manoharbalu wrote:
When I try to write the above object 'oTest' to a simple file using fwrite and CFile and then try to read using fread, I am getting bad pointer in oTest.str
Seeing the ACTUAL code would be helpful. Just sayin'...
"One man's wage rise is another man's price increase." - Harold Wilson
"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
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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fwrite only stores the memory contents of the class test - it doesn't care about the class definition except for it's size in memory.
CString stores the text in dynamic memory, only handle (pointer) to that memory is directly stored inside the CString object, therefore writing oTest just stores that pointer, but not the contents. If you use char[50] instead, that is a fixed-size array that is stored fully in your class test, and therewore fwrite will write it to file correctly.
The correct way to implement streaming for your test class in C++ is by overloading the streaming operators. See http://www.tutorialspoint.com/cplusplus/input_output_operators_overloading.htm[^]
GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)
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Windows 7 panning via a touchscreen used to scroll the client area for MFC Scrollview apps without any special code alterations but Windows 8.1 only scrolls the windows scrollbar while the view does not get scrolled until I invalidate the whole client area explicitly. I've tried various application types and am currently using the SysMets3 example from the Petzold Win32 "Programming Windows" book CD to study the behavior without MFC handling to see what is up.
Most Win32 scrolling examples are still basically the good old Petzold model when I follow the guidelines for "Legacy" apps in the Gestures and Touch MSDN technical articles so I'm assuming that approach is still supported. I've tried the disabling "Flicks" article and studied every line of code between current examples and the SysMets example and made sure there is case label for SB_THUMBTRACK and SB_THUMBPOSITION and all the other boilerplate case stuff.
In the end, debugging has revealed that the section that ultimately calls ScrollWindow() never runs because the scroll position and the scroll track position come into the WM_VSCROLL handler with the same value so the follow snippet no longer runs under Window 8.1 like it used to for touchscreens on previous OS versions...
...
si.fMask = SIF_POS;
SetScrollInfo (hWnd, SB_VERT, &si, TRUE) ;
GetScrollInfo (hWnd, SB_VERT, &si) ;
if (si.nPos != iVertPos)
{
ScrollWindow (hWnd, 0, cyChar * (iVertPos - si.nPos), NULL, NULL) ;
UpdateWindow (hWnd) ;
}
...
I'm testing this app on a Windows Surface (Gen 1) with Windows 8.1 with all the Windows Updates applied and Windows 8.1 Update installed back when the machine image was created. Visual C++ 2008 Professional with all known SP's installed.
I've even effectively removed all of the WM_VSCROLL code and tried returning from the WndProc with 0 and tried letting the default handler take it's course...either way the scrollbar moves anyway as if windows is setting the scroll position and scroll tracking position to the same value by some back door that breaks the ability to call ScrollWindow (or ScrollWindowEx) by traditional means (being able to determine how much to ScrollWindow().
Has anyone witnessed this and found a way around it without needing to add Touch/Gesture specific handlers in there?
Thanks in advance.
UPDATE: Just confirmed that this behavior continues to exist on Windows 10 Pro Technical Preview so it looks like Microsoft made some change at some point to make it almost impossible to benefit from the default legacy mapping of Touch Panning Gesture mappings to WM_VSCROLL messages without resorting to invalidating the entire client area.
Hopefully I'm missing some important detail and someone can set me straight.
modified 8-Jun-15 10:40am.
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Just posting what I've resorted to for anyone else reading this in the future...
I decided to handle WM_GESTURE messages and provide the calls to ScrollWindow there since the scroll position and scroll handle position can be correctly processed. The caveat to all this is that it requires targeting Windows 7 and in my case, since I'm still using Visual Studio 2008 Professional, my IDE needed to bind to the Windows SDK v7.1 for the updated headers needed. Newer IDE's will already bind to a version of the Windows SDK that includes the necessary symbols for targeting Windows 7.
Another caveat is that newer versions of MFC supposedly provide support for gesture via virtual member functions, but no classwizard support (as of VS 2012 Pro), blah...blah...blah, so adapt your approach as your environment dictates.
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well im trying to delete some nodes from my list and search for them using 2 different functions
problem is that deleteNode it just doesnt work (not even an error msgs)
when i activate the print list function it stays the same
could someoen help me with this?
deletes the node:
numStruct* deleteNode(numStruct** firstNode, numStruct* nodeToDelete)
{
numStruct* currNode = *firstNode;
numStruct* temp;
// if the list is not empty
if (*firstNode)
{
// the first node should be deleted
if (currNode == nodeToDelete)
{
*firstNode = (*firstNode)->Next;
free(currNode);
}
else
{
while (nodeToDelete != currNode->Next && currNode->Next)
{
currNode = currNode->Next;
}
if (nodeToDelete == currNode->Next && nodeToDelete)
{
temp = currNode->Next;
currNode->Next = temp->Next;
free(temp);
}
}
}
printf("\n\n");
}
this is my main:
case 2:
{
numStruct* t = anchorNode;
int arr[50] = { 261363 }, spot = 0;
printf("Please enter all the numbers you want to delete and end it with - 999 \n");
while ((arr[spot] != -999) && (spot != 50))
{
scanf("%d", &arr[spot]);
if (arr[spot] != -999)
{
spot++;
}
}
if (arr[spot] == -999)
{
arr[spot] = 261363;
spot--;
}
for (int i = 0; i < spot; i++)
{
int flag = 0;
while ((t->number != arr[i]) && (t->number != NULL))
{
t = t->Next;
if (t->number == arr[i])
{
flag = 1;
}
}
if (flag == 1)
{
deleteNode(anchorNode, t);
t = anchorNode;
}
}
break;
}
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i'd start looking here:
numStruct* deleteNode(numStruct** firstNode, numStruct* nodeToDelete)
fn takes a pointer to a pointer to a numStruct.
but here:
numStruct* t = anchorNode;
...
deleteNode(anchorNode, t);
you're just passing a pointer to a numStruct.
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