Posts by mitrmkar

A radical suggestion, instead of coding the games inside the switch, make the games functions and do something like

while(1)
{
    cout << "A: To Play the number guessing game." << endl;
    cout << "B: To Play the letter game." << endl;
    cout << "C: To quit program." << endl;
    cin >> choice;	

    switch (choice) 
    {
        case 'A': case 'a': // number guessing
            number_guessing();
        break;
        case 'B': case 'b': // letter game
            letter_game();        
        break;
        case 'C': case 'c': // exit
	    return 0;
        default:
	    cout << "Correct choice please ...\n";
        break;
    }
}

Or perhaps use if/else if/else ... instead of switch() .

...
double CelsiusToFahrenheit(double c);
...
int main()
{
...
}

double CelsiusToFahrenheit(double c) ; // <- remove the semicolon
{
	return (9.0 / 5.0 * c + 32);
}

Well, you get this code with copy/paste from Miscrosoft support site:
http://support.microsoft.com/kb/139652

So it seems to be ...

I think, it's not so interesting work to debug Microsoft official code examples on the forum...

I would actually like to know what goes wrong with that piece of code, (especially considering it is a simple MSDN example)

Try not to use the goto , have you considered using break instead

for(int i=0; i<10; i++) {
 if (i > 0)
  break;    // <- breaks out of the for loop ...
else
  cout << i;
}

Couldnt compile code:

ERROR:
Vector3.cpp||In function `int main()':|
Vector3.cpp|9|error: brace-enclosed initializer used to initialize `std::string'|
Vector3.cpp|9|error: brace-enclosed initializer used to initialize `std::string'|
Vector3.cpp|9|error: brace-enclosed initializer used to initialize `std::string'|
||=== Build finished: 3 errors, 0 warnings ===|

Oops, my bad, use ...

std::string inputs[3]  = {"1,2,3", "4,5,6", "7,8,9"};

Why is the stringstream initialized within the forloop instead of outside?

That way you automatically get a 'fresh' stringstream object meaning that you don't have to take care of resetting it in any way.

If I try using that while loop more than once, its useless as it is bypassed and keeps using the old values stored in the variables and dosent take in the seperate the new values.

Hmm .. I'm not quite sure what the actual problem is, but maybe the following helps to understand things (It's a modified version of what niek_e already posted)

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int main()
{
    // 3 strings as input
    string inputs[3]  = {{"1,2,3"}, {"4,5,6"}, {"7,8,9"}};
    string buffer;
    int integer;

    // iterate through the 3 input strings ...
    for(int ii = 0; ii < 3; ++ii)
    {
        stringstream ss;
        // store the input string in the stringstream
        ss << inputs[ii];

        // extract and cout the numbers one at the time ...
        while (getline(ss,buffer,','))
        {
            // convert to an int
            istringstream strin(buffer);
            strin >> integer;

            cout << integer;
        }
    }

    cin.get();
    return 0;
}

Output is ...

123456789

I'd say it should work as such.

So, the next step might be adding more error checking wherever applicable. I.e. verify that StartDoc/StartPage/EndDoc/EndPage return a value greater than zero, if not, use GetLastError() to get the error code. Also check that TextOut() is not returning FALSE .

[EDIT]
Since you seem to have trouble with the code tags, read http://www.daniweb.com/forums/misc-explaincode.html

The InitDocStruct() function seems OK to me. So the problem probably is in the actual printing code you have.

#include <winresrc.h> in the .rc file, that way the definitions of e.g. DS_MODALFRAME and WS_POPUP will be known. In addition to that, add #define IDC_STATIC -1 in the resource.h file.

'This is a test'. When you save it and then open it in notepad, this is what it looks like:

{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Arial;}}
\viewkind4\uc1\pard\fs20 this is a test\par
}

see? a whole lot of crap is added to the text file. How can I fix this?

The content is in Rich Text Format (RTF). Notepad does not understand it and hence displays it raw. Open the file with e.g. MS Word, and you'll see what you expected.

I deleted it and got more errors.

What is your compiler and what are the errors?

#include<iostream>
using namespace std;
int main()  // <- This line simply just MUST 
            // NOT be here .. there is no way around it

by that I mean I added the DLL's path to the additional dependencies directory...?

PATH does not mean the 'additional dependencies directory'. Windows searches for the .dll at run-time as specified in Dynamic-Link Library Search Order

PS. You can check your PATH environment variable simply by typing PATH in a command prompt, every path displayed by the command will be used for loading .dlls.

First of all, please use code tags when you post your code.

You have an extra curly brace there ...

// }  <- extra curly brace here
~Quadrilateral() // Call Destructor
{
    cout << "\n\nThe Base Class Rectangle has been destroyed!" << endl;
};

[EDIT]
Oh well, niek_e got there first ...

How about managing the id in the Base class, i.e.

class Base
{
    public:
        explicit Base() : id(object_count++) {}
        static int object_count;
    protected:
        int id;
};

int Base::object_count = 0;

class child: public Base
{
    public:
        child(int val){}
};
int main()
{
    child c(1);
    return 0;
}

just shows last student records ten time instead of each student .

Isn't that quite obvious if you take a close look at the loop,

for(k=1;k<=10;k++)
{
    // do this ten times ...

    // ask the user for the file name <-> shouldn't you 
    // open the file before this loop?
    scanf("%s",filename);*/

    // open the file, start reading from the very beginning
    fp=fopen("filename","r");
    
    // grab the information ...
    fscanf(fp,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,&id_number,date_of_birth,average);

    // and display it ...
    fprintf(stdout,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,id_number,date_of_birth,average);

    // now close the file <-> shouldn't you close the file after this loop?
    fclose(fp);
}

Print Dialog is not shown

That is because you specify the PD_RETURNDEFAULT flag, for details see

http://msdn.microsoft.com/en-us/library/ms646843(VS.85).aspx

I think the library you need is libcomdlg32.a.

Generally, when you get linker errors related to Windows API functions, lookup the function's documentation in MSDN, scroll down to the bottom of page where you can find the name of the required .lib (i.e. in this case: Import library Comdlg32.lib). That gives you enough information to map the Win .lib file to the Dev-Cpp's counterpart.

Futhermore, you have the variables the wrong way around, i.e. instead of a >> strin; use strin >>a;

Any guidance on how to polish this code up would be greatly appreciated.

The code needs proper, consistent indentation.

Shouldn't you be using pi2->pDevMode->dmFields = [B]DM_ORIENTATION[/B]; instead of pi2->pDevMode->dmFields = DM_PAPERSIZE;

You might use stringstream ...

#include <vector>
#include <string>
#include <sstream>
using namespace std;

int main()
{
    int a = 1;
    int b = 2;
    int c = 3;
    int d = 4;
    int e = 5;
    int f = 6;

    vector<string> abcd;
    stringstream sstrm;

    sstrm    << a << " " 
             << b << " " 
             << c << " " 
             << d << " " 
             << e << " " 
             << f;

    abcd.push_back(sstrm.str());

    return 0;
}

Note that vector has no append() member function, see vector reference

i did. thats all i am using to find the mouse position. Is it completely right? :O

You might change it to

int xPos = GET_X_LPARAM(lParam); 
int yPos = GET_Y_LPARAM(lParam);

although that probably won't fix anything. Anyway, I meant that you might perhaps post the complete code you have for drawing the line.

I am using DEV C++. Do I still need to link to libwinspool.a.

Yes, to link with libwinspool.a, open the Project/Options/Parameters tab, click Add Library or Object and browse for that library.

But I am getting linker error.
" [Linker error] undefined reference to `OpenPrinterA@12' "

You (may) need to #include <winspool.h> If you are not using a MS compiler, you need to link with libwinspool.a, otherwise winspool.lib.

sorry that doesn't work. I am trying to draw a line from where my mouse is when i click to where it is when i let go, if that helps. if i do it at 0,0 its fine but as i go further across and down the line isn't where my mouse is any more, it gets further and further away :(

You might post the code.

Apparently, calling TTF_Quit before TTF_CloseFont will cause the error. Is there any easy way around this?

You might also consider using atexit()

You might use debug version of the Wininet.dll, it is available at
http://www.microsoft.com/downloads/thankyou.aspx?familyId=57ad7099-de71-4b1c-8147-725545454146&displayLang=en

Obviously you don't have a class named CMyView , so you cannot use the provided example as is. Instead you could e.g. make the provided example a stand-alone function and use it as such, i.e. simply

BOOL GetPageSize(CSize &nRetVal)
{
    // rest of the example code here ...
}

error C2511: 'Contributor::Contributor(std::string,double,Contributor::gender,int)' : overloaded member function not found in 'Contributor'
see declaration of 'Contributor'

In the class declaration, you probably meant to have a member variable like gender Sex; instead of enum gender;

I have read about Object Serialization in my JAVA book. Could it be possible with C++?

See e.g. here

The function is malloc() , not maloc().

if have what should i do??

Erm, delete the text log.h (a header file) , leaving the curly brace inplace.

Please, use code tags when you post code.

See the comments ...

double getdaysmissedavg(int num_employees, int days_missed)
{
	int numemployees=0;
	int daysmissed=0;
	double daysmissedavg=0;

        // every time you call this function, you effectively calculate 
        // '0/0' which results in error (you must not divide by zero)
        // shouldn't you be using this function's parameters instead??
	daysmissedavg=numemployees/daysmissed;
	cout<<"Calculate the average number of days absent "<<daysmissedavg;

	system("pause");

        // then you'll probably want to return the calculated value
        //  'daysmissedavg' instead of zero ...
	return 0;
}

Do you really have the following line as is in the code? } log.h (a header file) If you do, then there's the error.

I have written the below code to create a modaless dialog.what to do to view the dialog?it just blinks and goes away...

combodlg cd= new combodlg(this);
	 	cd.Create(IDD_DIALOG1, this);
		cd.ShowWindow(SW_SHOW);

The constructor of the dialog can be like

combodlg::combodlg(CWnd* pParent /*=NULL*/)
{
    VERIFY(Create(IDD_DIALOG1, pParent));
}

and to use the dialog ...

combodlg * pcd = new combodlg(this);
pcd->ShowWindow(SW_SHOW);

and lastly, override PostNcDestroy() ..

void combodlg::PostNcDestroy() 
{
    CDialog::PostNcDestroy();
    delete this;
}

I'm pretty sure that exists too.

I also love this one (not sure if its in Windows API or DirectX):

#define 1 TRUE
#define 0 FALSE

Actually it would be

#define TRUE 1 
#define FALSE 0

i have to add only one line at a time.what i need is add he item in second dialog to first dialog's combo box as soon as I hit "Add" button each time.

You might change the second dialog's constructor to take e.g. a pointer to the first dialog's CComboBox and then use that pointer to add each item in the second dialog i.e. something like

// in the first dialog box ...
// Pass in the address of the combobox (m_selcam) ...
Add cd(NULL, &m_selcam);
cd.DoModal();

/////////////////////////////////////////////
// in the second dialog box ...
...
GetDlgItemText(IDC_EDIT2,str_name);
// m_selcamPtr is a pointer to the combobox 
// received via the dialog box's constructor
m_selcamPtr->AddString(str_name);
...

how do i use it ?

see here

Generally you use the MAKEINTRESOURCE macro to convert the resource id. However, the createStream() probably isn't capable of playing a resource.

if possible cud u provide me with some links.

Basic file I/O

Googled
odbc c++ wrapper

Define _WIN32_WINNT before you #include <windows.h> As to the reason why you need it, see Using Windows Headers

I saw the functionn GetConsoleWindow() in MSDN but I am unable to use it in both the compilers I have ( Dev C++ & Code::Blocks ) Please Help

You need to ... #define _WIN32_WINNT 0x0500 // ... or higher

Here you go.

You are trying to define the application's resources in the .cpp file. That cannot be done. Instead,

• save the Gui.cpp as e.g.
• resource.rc
• (= resource script)

• add the
• resource.rc
• file to your project

• then you might copy/paste the following code into Gui.cpp (it's pretty much standard Dev-C++ Win Gui application code). Assuming that you have created a Win32 GUI project.

• then compile and run

#include <windows.h>
#include "resource.h" // <- needed for the menu ID (IDR_MYMENU)

/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
char szClassName[ ] = "WindowsApp";

int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)

{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default color as the background of the window …

Could you post the Gui.cpp file?

Is there a command that hides the dos window while the program executes??

You might be looking for something like this
http://www.codeproject.com/KB/winsdk/runsilent.aspx

It worked. I red about it so something like this:

´When this property is set to false, selected nodes in the TreeView control remain highlighted in a different color than the current selection color when the TreeView control loses focus.´

Just a note, you've been reading the TreeView control documentation. In general, try to be as accurate as you can i.e. reading the RichTextBox documentation in this case.

You might want to set the HideSelection property of the RichTextBox to false.

I compiled it and ran it as an exe file :(

sorry this is not my area,

Say your .html file's full path is: "d:\folder\file.html", then the following command should do

// open the .html in default browser
system("start file://d:/folder/file.html");