class
Point3D : public Point {
int _z;
public:
Point3D() {
setX(0);
setY(0);
_z = 0;
}
Point3D(const int x, const int y, const int z) {
setX(x);
setY(y);
_z = z;
}
~Point3D() { /* Nothing to do */ }
int getZ() { return _z; }
void setZ(const int val) { _z = val; }
};