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#include <iostream>
class A
{
public:
virtual void F(int arg = 1) // 1
{
std::cout << "A " << arg << std::endl;
}
};
class B : public A
{
public:
virtual void F(int arg = 2) override // 2
{
std::cout << "B " << arg << std::endl;
}
};
int main() {
A *prt = new B;
prt->F();
return 0;
}
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