is there any way i can make the following work, or is there a work around? I must be missing something.
class base
{
public:
int someInt;
virtual void someFunction(){}
};
class derived : public base
{
public:
void someFunction(){}
void anotherFunction(){}
};
int main (int argc, char * const argv[]) {
base* aBasePointer = new derived;
aBasePointer->anotherFunction();
delete aBasePointer
return 0;
}
Use dynamic_cast<> to downcast the pointer to the derived class (don't forget to test the result).
e.g
if ((derived* p = dynamic_cast<derived*>(aBasePointer)))
{
// p is of type derived.
p->anotherFunction();
}
What Nim suggested will work, but if you're performing downcasts you almost certainly have a design problem. If you explain what you're trying to achieve maybe we can suggest a better alternative.
This will work
int main (int argc, char * const argv[]) {
derived* aDerivedPointer = new derived;
aDerivedPointer->anotherFunction();
delete aDerivedPointer
return 0;
}
Other than that, you need to provide more information about what you're trying to accomplish.
anotherFunction()to be virtual in base as well. Or call it through a pointer to derived. At the moment base knows nothing about this function.