#include
using namespace std;
template
class B1
{
public:
void SayHi()
{
T* pT = static_cast(this);
pT->PrintClassName();
}
protected:
void PrintClassName() { cout << "This is B1"; }
};
class D1 : public B1
{
// No overridden functions at all
};
class D2 : public B1
{
protected:
void PrintClassName() { cout << "This is D2"; }
};
int main()
{
D1 d1;
D2 d2;
d1.SayHi(); // prints "This is B1"
d2.SayHi(); // prints "This is D2"
return 0;
}
编译错误:error C2248: “D2::PrintClassName”: 无法访问 protected 成员(在“D2”类中声明)