class CSettings
{
    static CSettings * s_pSettings = NULL;
};

A>class CSettings
A>{
A>    static CSettings * s_pSettings = NULL;
A>};
A>

The declaration of a static data member in its class definition is not a definition and may be of an incomplete type other than cv-qualified void. The definition for a static data member shall appear in a namespace scope enclosing the member’s class definition. In the definition at namespace scope, the name of the static data member shall be qualified by its class name using the :: operator.

class CSettings
{
    static CSettings * s_pSettings;
};

CSettings* CSettings::s_pSettings = NULL;

The declaration of a static data member in its class definition is not a definition and may be of an incomplete type other than cv-qualified void. The definition for a static data member shall appear in a namespace scope enclosing the member’s class definition. In the definition at namespace scope, the name of the static data member shall be qualified by its class name using the :: operator.

class CSettings
{
    static const int i = 123;
};

class CSettings
{
public:
  static CSettings* & instance() { CSettings* var = NULL; return var; }
};

К>class CSettings
К>{
К>public:
К>  static CSettings* & instance() { static CSettings* var = NULL; return var; }
К>};
К>

К>>class CSettings
К>>{
К>>public:
К>>  static CSettings* & instance() { static CSettings* var = NULL; return var; }
К>>};
К>>

class CSettings
{
public:
    static CSettings & GetSettings()
    {
        static CSettings * s_pSettings = NULL;

        if (! s_pSettings)
        {
            s_pSettings = new CSettings;
        }

        return *s_pSettings;
    }
}

class CSettings
{
public:
    static CSettings & GetSettings()
    {
        static CSettings* s_pSettings = new CSettings;
        return *s_pSettings;
    }
}

WR>class CSettings
WR>{
WR>public:
WR>    static CSettings & GetSettings()
WR>    {
WR>        static CSettings* s_pSettings = new CSettings;
WR>        return *s_pSettings;
WR>    }
WR>}
WR>

static CSettings& GetSettings()
{
    static CSettings s_Settings;
    return s_Settings;
}

static CSettings& GetSettings()
{
    static std::auto_ptr<CSettings> s_pSettings = new CSettings;
    return *s_pSettings;
}