Question

关于C++继承问题，我的是保护继承，请问子类的对象赋值后怎么输出基类成员的值

#include<iostream>
using namespace std;
class A{
public:
void intiA(int xx,int yy)
{
x=xx;
y=yy;
t=1;
}
int get_x()
{return x;}
int get_y()
{return y;}
protected:
int t;
void moveA(int newx,int newy)
{
x=x+newx;
y=y+newy;
}
private:
int x;
int y;
};
class B:protected A
{
public:
void intiB(int x1,int x2,int x3)
{
intiA(x1,x2);//老师说X1,X2的值没有传递回父类，有没有告诉我怎么传递回去啊
w=x3;
z=2;
}

int get_w()
{return w;}
protected:
int z;
void moveB(int y1,int y2,int y3)
{
moveA(y1,y2);
w=w+y3;
}
private:
int w;
};
int main()
{
A a1;
a1.intiA(7,8);
cout<<a1.get_x()<<endl;
B b1;
b1.intiB(4,5,6);//我想输出4和5咯
//cout<<a1.get_x()<<endl;
cout<<b1.get_w()<<endl;
//b1.moveB(7,8,9);
//cout<<b1.get_w()<<endl;

return 0;
}

Answer 1

#include<iostream>
using namespace std;
class A
{
    public:
        void intiA(int xx,int yy)
        {
            x=xx;
            y=yy;
        }
        int get_x()
        {
            return x;
        }
        int get_y()
        {
            return y;
        }
        void moveA(int newx,int newy)
        {
            x=x+newx;
            y=y+newy;
        }
               
    private:
        int x;
        int y;
};
class B:public A
{
    public:
        void intiB(int x1,int x2,int x3)
        {
            intiA(x1,x2);//老师说X1,X2的值没有传递回父类，有没有告诉我怎么传递回去啊
            w=x3;
        }
        int get_w()
        {
            return w;
        }
        void moveB(int y1,int y2,int y3)
        {
            moveA(y1,y2);
            w=w+y3;
        }
        private:
            int w;
};
int main()
{
A a1;
a1.intiA(7,8);
cout<<a1.get_x()<<endl;
B b1;
b1.intiB(4,5,6);//我想输出4和5咯
cout<<b1.get_x()<<endl;
cout<<b1.get_w()<<endl;
b1.moveB(7,8,9);
cout<<b1.get_w()<<endl;
return 0;
}

追问

你确定编译能够通过吗？？？？？？？

追答

你自己运行下不就知道了啊

追问

不能通过，百分百肯定

追答

你用的vc6？你看这个test.cpp能编译过么，如果不能的话我也无话可说了

Answer 2

使用域操作符
::A

追问

可以具体一点吗，还没有学到那里啊，帮我改一下代码啦