第13周 《C++语言基础》程序阅读——多态性与抽象类 （2）

#include <iostream>
using namespace std;
class BASE
{
private:
    char c;
public:
    BASE(char n):c(n) {}
    virtual ~BASE() { cout<<c; }
};
class DERIVED:public BASE
{
private:
    char c;
public:
    DERIVED(char n):BASE(n+1),c(n) {}
    ~DERIVED(){ cout<<c; }
};
int main(){
    DERIVED d('X');
    return 0;
}