单项选择题

有以下程序：
#include ＜iostream＞
#include ＜string＞
using namespace std;
class base

private:
char baseName[10];
public:
base ( )

strcpy (baseName, "Base");

virtual char *myName()

return baseName;

char *className()

return baseName;

;
class Derived : public base

private:
char derivedName[10];
public:
Derived()

strcpy(derivedName,"Derived");

char *myName()

return derivedName;

char *className()

return derivedName;

;
void showPtr(base &p)

cout＜＜p.myName()＜＜" "＜＜p.className() ;

int main ()

base bb;
Derived dd;
showPtr(dd) ;
return 0;