C / C++ / MFC

class CEmployee
{
protected:
    virtual double getCommission( void ) { return 0.0; }
};
 
class CSalesman : public CEmployee
{
protected:
    virtual double getCommission( void ) { return 1.5; }
};
 
class CStaff : public CEmployee
{
    // no getCommission() here, use base class implementation
};

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

CMenu m_menu;

HMENU SetNewMenu(UINT nMenu);

HMENU CMainFrame::SetNewMenu(UINT nMenu)
{
    // Load the menu from the resources
    m_menu.LoadMenu(nMenu);
    m_menu.LoadToolbar(nMenu);  // if you will need a toolbar also

    return (m_menu.Detach());
}

CMenu* pMenu = AfxGetMainWnd()->GetMenu();

if (pMenu)
	pMenu->DestroyMenu();
	
CMainFrame* pFrame = reinterpret_cast<CMainFrame*>(m_pMainWnd)->SetNewMenu(IDR_MENU1);
ASSERT(pFrame != NULL);

HMENU hMenu = pFrame->NewMenu();
CMenu* pNewMenu = CMenu::FromHandle( hMenu );
ASSERT(pNewMenu != NULL);

AfxGetMainWnd()->SetMenu(pNewMenu);

AfxSetResourceHandle(hInst);
CMainFrame* pMainFrame = (CMainFrame*)AfxGetApp()->m_pMainWnd;
pMainFrame->m_wndMenuBar.ResetCommandBar();
pMainFrame->m_wndMenuBar.InsertMenuBar(IDR_MAINFRAME);
pMainFrame->m_wndMenuBar.LoadToolBar(IDR_TOOLBAR1);

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

file.seekg(0, ios::end); // seek to the end
long filesize = file.tellg();

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

class A
{
public:
	double x;
	double y;
	double speed;
	double z;
};

main(int argc, char *argv[])
{
	A objectA;

    fstream File;
	File.open ("test.txt", ios::binary);

	File.seekp(0);

	objectA.x=25.314;//xcoord
    objectA.y=-478.215;//ycoord
    objectA.z=34821.01;//zcoord

File.write(&objectA.x, sizeof(objectA.x));

File.write(&objectA, sizeof(objectA));

ofstream outfile("test.txt", ios::binary);
outfile.write((char *) &AAA, sizeof(AAA));

#include <iostream.h>
#include <fstream.h>
int main()
{
class A
{
public:
double x;
double y;
double z;
};

A objectA,objectB;

objectA.x=123.345;
objectA.y=345.003;
objectA.z=456.2;
cout<<"Following data will be written to 123.txt"<<endl;
cout<<"A.x="<<objectA.x<<endl;
cout<<"A.y="<<objectA.y<<endl;
cout<<"A.z="<<objectA.z<<endl;

ofstream outfile("c:\\123.txt",ios::binary);//creare ofstream object
outfile.write((char*)&objectA,sizeof(objectA));//write object
outfile.close(); //close the stream-NEVER FORGET TO DO THIS
cout<<"object A has been written to the file"<<endl<<endl;
cout<<"reading data from 123.txt"<<endl;
ifstream infile("c:\\123.txt",ios::binary); //create stream
infile.read((char*)&objectB,sizeof(objectB)); //read object from stream
outfile.close(); //close stream
cout<<"B.x="<<objectB.x<<endl;
cout<<"B.y="<<objectB.y<<endl;
cout<<"B.z="<<objectB.z<<endl;

return 0;
}

ifstream infile("test.txt", ios::binary);<br />
A objectA;<br />
for(i=0;i<3;i++)<br />
{<br />
infile.read((char *) &objectA, sizeof(objectA));<br />
}<br />
infile.close();

ofstream outfile("test.txt", ios::binary);
outfile.write((char *) &AAA, sizeof(AAA));

#include <iostream.h>
#include <fstream.h>
int main()
{
class A
{
public:
double x;
double y;
double z;
};

A objectA,objectB;

objectA.x=123.345;
objectA.y=345.003;
objectA.z=456.2;
cout<<"Following data will be written to 123.txt"<<endl;
cout<<"A.x="<<objectA.x<<endl;
cout<<"A.y="<<objectA.y<<endl;
cout<<"A.z="<<objectA.z<<endl;

ofstream outfile("c:\\123.txt",ios::binary);//creare ofstream object
outfile.write((char*)&objectA,sizeof(objectA));//write object
outfile.close(); //close the stream-NEVER FORGET TO DO THIS
cout<<"object A has been written to the file"<<endl<<endl;
cout<<"reading data from 123.txt"<<endl;
ifstream infile("c:\\123.txt",ios::binary); //create stream
infile.read((char*)&objectB,sizeof(objectB)); //read object from stream
outfile.close(); //close stream
cout<<"B.x="<<objectB.x<<endl;
cout<<"B.y="<<objectB.y<<endl;
cout<<"B.z="<<objectB.z<<endl;

return 0;
}

ifstream infile("test.txt", ios::binary);<br />
A objectA;<br />
for(i=0;i<3;i++)<br />
{<br />
infile.read((char *) &objectA, sizeof(objectA));<br />
}<br />
infile.close();