阅读程序并写出执行结果

#include <iostream>using namespace std;class Data{public:    Data(int i):x(i){cout<<"A";}    ~Data(){ cout<<"B";}private:    int x;};class Base{public:    Base(int i):b1(i){cout<<"C";}    ~Base(){ cout<<"D";}private:    int b1;};class Derived:public Base{public:    Derived (int i,int j):Base(i),d1(j){        cout<<"E";    }    ~Derived(){cout<<"F";}private:    Data d1;};int main(){    Derived obj(1,2);    return 0;}

过程分析：

生成了一个derived类的对象obj，就要调用derived类的构造函数，base类是derived类的基类，调用基类的构造函数，内嵌data类的对象，调用data类的构造函数

析构函数的顺序与构造函数的顺序相反。