#include <iostream.h>
class base{
int x;
public:
base(int i)
{ x=i;
cout<<"构造base类, x="<<x<<endl;
}
~base()
{ cout<<"析构base类, x="<<x<<endl;
}
void show()
{ cout<<"x="<<x<<endl;
}
};
class derive:public base{
int y;
base d;
public:
derive(int i,int j,int k):base(i),d(j)
{ y=k;
cout<<"构造derived类, y="<<y<<endl;
}
~derive()
{ cout<<"析构derived类, y="<<y<<endl;
}
};
void main()
{
derive obj(1,2,3);
obj.show();
}
我不明白运行结果中的第一行、第四行、第七行
构造base类, x=1
构造base类, x=2
构造derived类, y=3
x=1
析构derived类, y=3
析构derived类, x=2
析构derived类, x=1