求解
#include<iostream>using namespace std;
class base
{public:
void who(){cout<<"base class"<<endl;}
};
class derive1:public base
{public:
void who(){cout<<"derive1 class"<<endl;}
};
class derive2:public base
{public:
void who(){cout<<"derive2 class"<<endl;}
};
int main()
{
base obj1,*p;
derive1 obj2;
derive2 obj3;
p=&obj1;
p->who();
p=&obj2;
p->who();
p=&obj3;
p->who();
obj2.who();
obj3.who();
return 0;
}
