Mega Code Archive
A virtual function
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#include <iostream>
using namespace std;
class BaseClass {
public:
virtual void who() { // specify a virtual function
cout << "Base\n";
}
};
class DerivedClass1 : public BaseClass {
public:
void who() { // redefine who() for DerivedClass1
cout << "First derivation\n";
}
};
class DerivedClass2 : public BaseClass {
public:
void who() { // redefine who() for DerivedClass2
cout << "Second derivation\n";
}
};
int main()
{
BaseClass base_obj;
BaseClass *p;
DerivedClass1 DerivedClass1_obj;
DerivedClass2 DerivedClass2_obj;
p = &base_obj;
p->who(); // access BaseClass's who
p = &DerivedClass1_obj;
p->who(); // access DerivedClass1's who
p = &DerivedClass2_obj;
p->who(); // access DerivedClass2's who
return 0;
}
Base
First derivation
Second derivation
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