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Most of the time when we say that there is a bug in the API, its usally that you are using the api in a wrong way.
Still Alive!!!
Thank you God.
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Hey,
I'm trying to get some code here to compile and I'm having an issue. The "GetMinVal" method below should be defined as returning a const since it doesn't modify the underlying class. I also eventually need to access it from a
friend std::ostream& operator << (std::ostream&, const WT300_QaStateTable&);
method which will need for it to be a const.
My question is how do I make the following compiler error go away and still maintain "GetMinVal" as a const method.
Gotten using VC++ 2003, ver 7.1...
...\c2678_err.cpp(17): error C2678: binary '[' : no operator found which takes a left-hand operand of type 'const MAP_STR_STR' (or there is no acceptable conversion)
<br />
#include "StdAfx.h"<br />
<br />
#include <map><br />
#include <string><br />
<br />
using namespace std;<br />
<br />
typedef map<std::string, std::string> MAP_STR_STR;<br />
<br />
class c2678_err<br />
{<br />
public:<br />
c2678_err(void);<br />
~c2678_err(void);<br />
<br />
void SetMinVal(std::string key, std::string val) {mMinVal[key] = val;}<br />
std::string GetMinVal(std::string key) const {return mMinVal[key];}
<br />
private:<br />
<br />
MAP_STR_STR mMinVal;<br />
};<br />
<br />
c2678_err::c2678_err(void)<br />
{<br />
}<br />
<br />
c2678_err::~c2678_err(void)<br />
{<br />
}<br />
<br />
main()<br />
{<br />
c2678_err myProblem;<br />
std::string howMany;<br />
<br />
myProblem.SetMinVal("dogs", "02");<br />
howMany = myProblem.GetMinVal("dogs");<br />
<br />
cout << howMany;<br />
}
regards,
~Patrick
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IIRC, map<>::operator [] cannot be used on a const map, since its used both for inserting and returning elements. It also returns a refrence to the value.
Maybe this will suffice?
std::string GetMinVal(const std::string& key) const
{
map<std::string, std::string>::const_iterator it = mMinVal.find(key);
if (it == mMinVal.end())
return (*it).second;
else
return "unknown key";
}
---
“Our solar system is Jupiter and a bunch of junk” - Charley Lineweaver 2002
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if (it != mMinVal.end())
sorry! 
---
“Our solar system is Jupiter and a bunch of junk” - Charley Lineweaver 2002
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No worries, I saw that.
Thanks for the response. I totally missed that subscripting can modify that map, making it a non-const operation by definition. Ooops. Love it when the compiler doesn't let me blow my hand off.
thanks!
~Patrick
Code On!
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Hi,
How to know whether or not "Internet Connection Firewall" is enabled or disbaled for any Network connection (In Windows XP & 2K). If anybody have sample code, please send it to me.
Thanks,
-Koti
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Howdy my friends!
We have been developing Pocket PC solution for SAP R/3. But, we faced a problem with web service on .NET 2003. When I try to invoke method from VB.NET, return values don't set. Always "nothing". But, I can see the response SOAP message from SAP R/3 by MS SOAP Trace tool.
My sample code as below;
' Set RFC parameters<br />
Dim strPrm1 As String<br />
<br />
' Set URL<br />
Dim sURL As String<br />
sURL = "http://ybpent:8000/sap/bc/soap/rfc?sap-client=274"<br />
<br />
' Set credentials<br />
Dim m_Credentials As ICredentials<br />
m_Credentials = New NetworkCredential("xxxxx", "xxxxx")<br />
<br />
' Set web service<br />
Dim m_RfcGetTrustedSystemId As New dNETSOAP4SAPR3.RfcGetTrustedSystemId.RFC_GET_TRUSTED_SYSTEM_IDService<br />
m_RfcGetTrustedSystemId.Url = sURL<br />
m_RfcGetTrustedSystemId.Credentials = m_Credentials<br />
m_RfcGetTrustedSystemId.Timeout = -1<br />
<br />
' Call web service<br />
strPrm1 = m_RfcGetTrustedSystemId.RFC_GET_TRUSTED_SYSTEM_ID()<br />
m_RfcGetTrustedSystemId.Dispose()
Anybody has an idea about it?
Thanks.
Orkun GEDiK
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woah what langauge is that , Greek?
Still Alive!!!
Thank you God.
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My god! It must be in VB.NET. I'm very sorry.
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hi i just began with visual c++ and i had programmed in just c++
and there the code was
ofstream output ( c:.....);
output >> int y
but i tried that in visual c++but it didnt work....
This is my code:
void CBr4turboDlg::OnOK()
{
// TODO: Add extra validation here
AfxMessageBox ( "F*** you");
CString szEdit;
m_editText.GetWindowText ( szEdit );
}
I have a member variable in my edit field and i want that 2 write 2 a text file??
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so what's your problem ???  
what error does the compiler returns (you said it didn't work...)
please be more explicit, otherwise, you'll stay alone with your empty text file...
TOXCCT alias Nicolas C.
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I have searched every page for a code for writing a variable in a text file
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Emm that was me above
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If you write non-Unicode application, you should use simple
ofstream << (LPCTSTR)strName
With Unicode, it's more complicated, because STL doesn't provide generic text mapping, i.e. TCHAR's, LPCTSTR's etc. You could use your own mapping:
<br />
#if defined(_UNICODE)<br />
#define tstring wstring<br />
#define tofstream wofstream<br />
....<br />
#else<br />
#define tstring string<br />
#define tofstream ofstream<br />
#endif<br />
I use it in many of my apps and it works ok.
Robert-Antonio
"I launched Norton Commander and saw, drive C: on the left, drive C: on the
right...Damn, why I need two drives C:??? So I formatted one..."
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Hi every body!
I have created a global hook function (in Dll) to capture Keyboard events. Every a key has been pressed, the hook function send a user-defined message to my application. My problem is:
My application can only receive the message, when it has focus.
Could you tell me why? And How can I correct it?
Thanks!
//Hook function
static LRESULT CALLBACK KeyboardHook(UINT nCode, WPARAM wParam, LPARAM lParam)
{
if( (nCode >=0) && (nCode == HC_ACTION) && (wParam == VK_SNAPSHOT))
PostMessage(hWndReceiver, UWM_CAPTURED,0,0);
return CallNextHookEx(hookKeyBoard,nCode,wParam,lParam);
}
//Message Map
BEGIN_MESSAGE_MAP(CTestHook, CDialog)
ON_REGISTERED_MESSAGE(UWM_CAPTURED,OnCapture)
//{{AFX_MSG_MAP(CTestDllDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
//
afx_msg bool OnCapture(WPARAM wParam, LPARAM lParam);
xyz
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Silly Boy wrote:
My application can only receive the message, when it has focus.
Does that imply that the PostMessage() statement is posting the message regardless of what window has the focus? If not, I'd be curious if any of the three conditions preceding the PostMessage() statement are evaluating to FALSE.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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I am using PreCreateWindow in my MDI application and
have noticed that it gets called twice. The first time it gets called, the CREATESTRUCT has nothing in it (e.g. lpszName is null and so are lpszClass). The 2nd time it is called, I see information of my app in the lpszName and lpszClass fields of the CREATESTRUCT. Why is this being called twice (and with one call passing nothing to it?)?
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this is the text from the msdn
The default implementation of this function checks for
a NULL window class name and substitutes an appropriate
default. Override this member function to modify the
CREATESTRUCT structure before the window is created.
and also
By design, these derivations of PreCreateWindow are
not documented
so you too need to check for null and perform any relavant operation.
May be the first call is for you too fill any information i.e if you want to create your own window class, coz if you dont MFC defines it.
then in the next call you are given an option to modify the window style.
Still Alive!!!
Thank you God.
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hi:
as we know ,there are two track modes in the VCD ,the first one is MODE2 FORM1 and the second one is MODE FORM2.
how to read the VCD sectors.
who can help me?
thank you very much.
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Can we overload the function operator () - Curly brackets ?
If yes then what would be the syntax for this.
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int operator()(int i1, int i2)
{
return ;
}
Stability. What an interesting concept. -- Chris Maunder
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Why would you want the curly brackets to have a dual role in life? What problem are you trying to solve?
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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I agree with you, no need to overload curly brackets.
Still Alive!!!
Thank you God.
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Mr.Prakash wrote:
I agree with you, no need to overload curly brackets
Two words:
Function Objects
 
Ian Darling
"The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt." - Bertrand Russell
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