#include <QCoreApplication>
#include<stdio.h>
class A
{protected:
int x;
public:
A(int xx):x(xx) {}
virtual void say(){printf("a say %d\n",x);}
};
class B:public A
{protected:
int y;
public:
B(int xx,int yy):y(yy),A(xx) {}
void say(){printf("b say %d %d\n",x,y);}
void haha(){printf("b hahahaah\n");}
};
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
A aa(8);
aa.say();
B b(1,2);
b.say();
A &aaa=b;//把b代表的空间取小名aaa,并当做A类型对象来看,
aaa.say();
b.haha();
A zda=b;//
zda.say();
return a.exec();
}
上面A zda=b调用复制构造函数
随记,虚函数与引用
猜你喜欢
转载自blog.csdn.net/qq_26046771/article/details/72721864
今日推荐
周排行