Keeping getting into errors in my code...this looks to be the wierdest so far...
class bug: public living{
protected:
bool ate;
int energy;
public:
virtual void moveToFood(point hunter, point food);
bool eatIt(point hunter, point food){
int hx, hy, fx, fy;
hx=hunter.getx();
hy=hunter.gety();
fx=food.getx();
fy=food.gety();
if((hy==fy)&&(hx==fx))
ate=true;
else
ate=false;
return ate;
}
void setEnergy(int nrg){energy=nrg;}
int getEnergy(){return energy;}
virtual void print()const{location.print();}
};
class ladybug: public bug{
public:
ladybug(int u, int v){location.set(u,v);energy=0;}
void moveToFood(point hunter, point food){
int hx, hy, fx, fy;
hx=hunter.getx();
hy=hunter.gety();
fx=food.getx();
fy=food.gety();
if(hx<fx)
{
hx+=2;
if(hx>fx)
hx--;
}
else if(hx>fx)
{
hx-=2;
if(hx<fx)
hx++;
}
else if(hy<fy)
{
hy+=2;
if(hy>fy)
hy--;
}
else if(hy>fy)
{
hy-=2;
if(hy<fy)
hy++;
}
location.set(hx,hy);
}
void print()const{
cout<<"The ladybug is at ";
location.print();
if(ate==true)
cout<<"It just ate an aphid."<<endl;
else
cout<<"It is still hungry."<<endl;
}
};When ever I try to declare a ladybug or other derived class object I get that
undefined reference to 'vtable for bug' error. What is going on?
