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#include <iostream>
using namespace std;
class A
{
public:
virtual int get(){return 1;}
};
class B:public A
{
public :
int get(){return 2;}
};
void main()
{
while (1)
{
cout<<"(1)父类(2)子类(3)退出:";
int choice;
cin>>choice;
A p;
bool quit=false;
switch (choice)
{
case 1:p=A();
break;
case 2:p=B();
break;
case 3:quit=true;
break;
default:cout<<"请输入1、2或者3。";
break;
}
if (quit==true)
{
break;
}
cout<<p.get()<<endl;
}
}
default:cout<<"请输入1、2或者3。";
quit=true;
break;
#include <iostream>
using namespace std;
class A
{
public:
virtual int get(){return 1;}
};
class B:public A
{
public :
int get(){return 2;}
};
int main()
{
while (1)
{
cout<<"(1)父类(2)子类(3)退出:";
int choice;
cin>>choice;
A p;
bool quit=false;
switch (choice)
{
case 1:p=A(); cout<<p.get()<<endl;
break;
case 2:p=B(); cout<<p.get()<<endl;
break;
case 3:quit=true;
break;
default://cout<<"请输入1、2或者3。";
break;
}
if (quit==true)
{
break;
}
//cout<<p.get()<<endl;
}
return 0;
}