#include <iostream>
#include <cstdlib>
#include <ctime>
#include <typeinfo>
using namespace std;
class Grand
{
private:
int hold;
public:
Grand(int h = 0) :hold(h){}
virtual void Speak() const{ cout << "I am a grand class!\n"; }
virtual int Value() const{ return hold; }
};
class Superb :public Grand
{
public:
Superb(int h = 0) :Grand(h){}
void Speak() const{ cout << "I am a superb class!!\n"; }
virtual void Say() const
{
cout << "I hold the superb value of " << Value() << "!\n";
}
};
class Magnificent :public Superb
{
private:
char ch;
public:
Magnificent(int h = 0, char cv = 'A') :Superb(h), ch(cv){}
void Speak() const{ cout << "I am a magnificent class!!!\n"; }
void Say() const{
cout << "I hold the character " << ch <<
" and the integer " << Value() << "!\n";
}
};
Grand * GetOne();
int main()
{
srand(time(0));
Grand * pg;
Superb * ps;
for (int i = 0; i < 5; i++)
{
pg = GetOne();
cout << "Now processing type " << typeid(*pg).name() << ".\n";
pg->Speak();
if (ps = dynamic_cast<Superb *>(pg))
ps->Say();
if (typeid(Magnificent) == typeid(*pg))
cout << "Yes, you're really magnificent.\n";
}
return 0;
}
Grand * GetOne()
{
Grand * p;
switch (rand() % 3)
{
case 0: p = new Grand(rand() % 100);
break;
case 1: p = new Superb(rand() % 100);
break;
case 2: p = new Magnificent(rand() % 100, 'A' + rand() % 26);
break;
}
return p;
}
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