C / C++ / MFC

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

CString str;
strcpy(str.GetBuffer(###), ...);
str.ReleaseBuffer();

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

// assumes non-UNICODE version of program
CString str;
for( int i=0; i<14; ++i )
{
    str += (char)pkt_data[i];
}

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

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

class CBaseClass<br />
{<br />
.....<br />
....<br />
....<br />
<br />
private:<br />
int m_ClassID;<br />
enum<br />
{<br />
Worker,<br />
Salesman,<br />
Staff<br />
};<br />
}

CWorker::CWorker()<br />
{<br />
m_ClassID = CBaseClass::Worker;<br />
}<br />

#include <iostream>
#include <vector>

using namespace std;

class Visitor;

class CEmployee 
{
public:
    virtual void accept(Visitor& v);

    virtual void foo() 
    { 
        cout << "employee" << endl; 
    }
};

class CSalesman : public CEmployee
{
public:
    virtual void accept(Visitor& v);

    virtual void getCommision() 
    {  
        cout << "commision" << endl;
    }

    virtual void foo()
    {
        cout << "salesman" << endl;
    }
};

class CStaff : public CEmployee
{
public:
    virtual void accept(Visitor& v);

    virtual void foo()
    {
        cout << "staff" << endl;
    }
};

class Visitor
{
public:
    virtual void visit(CEmployee* pA) = 0;
    virtual void visit(CSalesman* pB) = 0;
    virtual void visit(CStaff* pC) = 0;
};

void CEmployee::accept(Visitor& v)
{
    v.visit(this);
}

void CStaff::accept(Visitor& v)
{
    v.visit(this);
}

void CSalesman::accept(Visitor& v)
{
    v.visit(this);
}

class CommisionVis : public Visitor
{
public:
    virtual void visit(CEmployee* pEmp)
    {
        // do nothing
    }

    virtual void visit(CSalesman* pEmp)
    {
        pEmp->getCommision();
    }

    virtual void visit(CStaff* pEmp)
    {
        // do nothing
    }
};


int main()
{
    std::vector<CEmployee*> empList;
    empList.push_back(new CEmployee());
    empList.push_back(new CSalesman());
    empList.push_back(new CStaff());
    for(size_t i = 0; i < empList.size(); i++)
    {
        empList.at(i)->foo();
    }
    cout << "**************************" << endl;
    CommisionVis vis;
    for(size_t i = 0; i < empList.size(); i++)
    {
        empList.at(i)->accept(vis);
    }
    // ... more code
}