Mega Code Archive
A base class reference is used to access a virtual function
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#include <iostream>
using namespace std;
class base {
public:
virtual void vfunc() {
cout << "This is base's vfunc().\n";
}
};
class derived1 : public base {
public:
void vfunc() {
cout << "This is derived1's vfunc().\n";
}
};
class derived2 : public base {
public:
void vfunc() {
cout << "This is derived2's vfunc().\n";
}
};
// Use a base class reference parameter.
void f(base &r) {
r.vfunc();
}
int main()
{
base b;
derived1 d1;
derived2 d2;
f(b); // pass a base object to f()
f(d1); // pass a derived1 object to f()
f(d2); // pass a derived2 object to f()
return 0;
}
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