C / C++ / MFC

1. By default, a header is recompiled each time that a .cpp #includes it, so defining large functions in headers can really slow down a compile. Some compilers optimize this, but it isn't guaranteed.
2. A header should be an interface, with implementation details going in a .cpp rather than cluttering the header.

1. If a function is simple, usually just a single line, it's expedient to just define it in the header.
2. A function template, or a function in a class template, is defined in a header.

1. A "helper" class (used only to implement another one) can be defined in the same .cpp as the only class that uses it.
2. Small, related classes can be defined in a common .h and implemented in a common .cpp.

#include <iostream>

using namespace std;

int main()
{
    cout<< "Tax software developed by https://iq.direct" << endl;
    cout<< "Enter Salary:";
    
    double s = 0, t = 0;
    cin >> s;
    
    cout<<"you entered: " << s << endl;
    
    if (s < 600)
    {
        t = 0;
    }
    if (s >= 600 && s < 800 )
    {
        t = s * 0.1;
    }
    if (s >= 800 && s < 1000 )
    {
        t = s * 0.13;
    }
    
    cout<< "The tax will be :" << t;

    
    return 0;
}

BOOL CStorge::OnInitDialog()
{
	int numolines;
	



	storagepointer = new CRichEditCtrl;
	

	CDialog::OnInitDialog();
	
	CHARFORMAT cf2 = { 0 };

	
	STREAMIN((WPARAM)storage_ptr, (LPARAM)storagelen);
	storagepointer->SetSel(0, -1);
	cf2.cbSize = sizeof(cf2);
	cf2.dwMask = CFM_FACE | CFM_PROTECTED;
	cf2.dwEffects = CFE_PROTECTED;
	memcpy(&cf2.szFaceName[0], "Courier New",12);
	storagepointer->SetSelectionCharFormat(cf2);
	storagepointer->SetSel(0, 0);
	storagepointer->ShowWindow(SW_SHOW);
	ShowWindow(SW_SHOW);
	return TRUE;
}

LRESULT CStorge::STREAMIN(WPARAM mywparam, LPARAM mylparam)
{
	char *sendptr;
	sendptr = (char*)mywparam + 4;
	streaminparm parms;
	parms.storpointer = (char  *)sendptr;
	parms.storlen = (int)mylparam;

	EDITSTREAM STORAGESTREAM;
	STORAGESTREAM.pfnCallback = storagestreamin;
	STORAGESTREAM.dwCookie = mywparam;
	STORAGESTREAM.dwCookie = (DWORD_PTR) &parms;

long numstream = storagepointer->StreamIn(SF_TEXT,STORAGESTREAM);

	return TRUE;

}

DWORD storagestreamin(DWORD_PTR dwCookie,
	LPBYTE pbBuff,
	LONG cb,
	LONG* pcb)
	
{


	static BOOL flag = 0;
	if (flag == 0)
		flag = 1;
	else
	{
		*pcb = 0;
		flag = 0;
		return 0;
	}
	int i;
	streaminparm* inparms = (streaminparm *)dwCookie;
	void* holdptr = inparms->storpointer;
	char* holdptr1 = (char*)pbBuff;
		int totalen = inparms->storlen;
		memcpy((char *)pbBuff, "This is a test\r\n",16);
		*pcb = 16;
   	return 0;

		for (i = 0; i < totalen; i += storageline)
		{
			memcpy(holdptr1, holdptr, storageline);
			holdptr = (char*)holdptr + storageline;
			holdptr1 = (char*)holdptr1 + storageline;
			*holdptr1 = '\r';
			holdptr1 = (char*)holdptr1 + 1;
			*holdptr1 = '\n';
			*pcb += 74;
		}

		return 0;


}

void CStorge::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
	

	DDX_Text(pDX, IDC_ASID, asidstr);
	DDX_Text(pDX, IDC_SP, spstr);
	DDX_Text(pDX, IDC_TCB, tcbstr);
	DDX_Text(pDX, IDC_FP, fpstr);
	DDX_Control(pDX, IDC_EDIT2, (CWnd&) *storagepointer);
			
}

IDD_DIALOG10 DIALOGEX 0, 0, 769, 429
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION | WS_SYSMENU | WS_VISIBLE
CAPTION "Storage View / Change"
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
    CTEXT           "",IDC_TCB,45,30,47,8
    CTEXT           "OwnIng TCB",IDC_STATIC,41,13,58,8
    CTEXT           "",IDC_SP,164,28,43,8
    CTEXT           "Storage SubPool",IDC_STATIC,162,12,55,8
    CTEXT           "",IDC_ASID,265,26,32,8
    CTEXT           "Asid",IDC_STATIC,269,9,31,8
    CTEXT           "",IDC_FP,399,31,19,8
    CTEXT           "Fetch Protect Key",IDC_STATIC,392,15,63,8
    CONTROL         "",IDC_CUSTOM5,"PieCOntrol",WS_TABSTOP,617,99,109,109
    COMBOBOX        IDC_COMBO1,491,236,48,30,CBS_DROPDOWN | CBS_SORT | WS_VSCROLL | WS_TABSTOP
    CONTROL         "",IDC_EDIT2,"RichEdit20A",ES_MULTILINE | WS_BORDER | WS_TABSTOP | WS_VISIBLE, 45,106,494,314  THE RICH EDIT
    EDITTEXT        IDC_EDIT1,45,110,494,314,ES_AUTOHSCROLL
    COMBOBOX        IDC_COMBO2,637,244,67,16,CBS_DROPDOWN | CBS_SORT | WS_VSCROLL | WS_TABSTOP
    LISTBOX         IDC_LIST2,641,310,68,11,LBS_SORT | LBS_NOINTEGRALHEIGHT | WS_VSCROLL | WS_TABSTOP
END

ForNow wrote:

CDialog::OnInitDialog();

CHARFORMAT cf2 = { 0 };

STREAMIN((WPARAM)<b>storage_ptr</b>, (LPARAM)storagelen);</blockquote>

What is storage_ptr? Its type and value?

void* storage_ptr;

ForNow wrote:

C++Copy Code
void* storage_ptr;

IDD_DIALOG10 DIALOGEX 0, 0, 769, 429
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
CAPTION "Storage View / Change"
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
    CTEXT           "",IDC_TCB,45,30,47,8
    CTEXT           "OwnIng TCB",IDC_STATIC,41,13,58,8
    CTEXT           "",IDC_SP,164,28,43,8
    CTEXT           "Storage SubPool",IDC_STATIC,162,12,55,8
    CTEXT           "",IDC_ASID,265,26,32,8
    CTEXT           "Asid",IDC_STATIC,269,9,31,8
    CTEXT           "",IDC_FP,399,31,19,8
    CTEXT           "Fetch Protect Key",IDC_STATIC,392,15,63,8
    CONTROL         "",IDC_CUSTOM5,"PieCOntrol",WS_TABSTOP,617,99,109,109
    COMBOBOX        IDC_COMBO1,491,236,48,30,CBS_DROPDOWN | CBS_SORT | WS_VSCROLL | WS_TABSTOP
    CONTROL         "",IDC_EDIT2,"RichEdit20A",ES_MULTILINE | WS_BORDER | WS_TABSTOP,45,106,494,314
  //  EDITTEXT        IDC_EDIT1,45,110,494,314,ES_AUTOHSCROLL
    COMBOBOX        IDC_COMBO2,637,244,67,16,CBS_DROPDOWN | CBS_SORT | WS_VSCROLL | WS_TABSTOP
    LISTBOX         IDC_LIST2,641,310,68,11,LBS_SORT | LBS_NOINTEGRALHEIGHT | WS_VSCROLL | WS_TABSTOP
END

ForNow wrote:

maybe it overlaid IDC_EDIT