#include //这个程序有问题（september 1246）
using namespace std;
class point
{
private:
int xpos;
int ypos;
public:
point(int x=0,int y=0)
{
xpos=x;
ypos=y;
}
void disp()
{
cout<<"("<<xpos<<" ,"<<ypos<<")"<<endl;
}
int getx()
{
return xpos;
}
int gety()
{
return ypos;
}
};
class point3D:public point
{
private:
int zpos;
private:
point3D(int x,int y,int z):point(x,y)
{
zpos=z;
}
void disp()
{
cout<<"("<<getx()<<", "<<gety()<<", "<<zpos<<")"<<endl;
}
int calcsum()
{
return getx()+gety()+zpos;
}
};
int main()
{
point pt1(7,8);
pt1.disp();
point3D pt2(3,4,5);
pt2.disp();
int res=pt2.calcsum();
cout<<res<<endl;
return 0;
}
|
