Object Slicing in Function Arguments

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What does the following program print?

class A {
public:
    virtual void print() { std::cout << "A"; }
};

class B : public A {
public:
    void print() override { std::cout << "B"; }
};

void doit(A a) { a.print(); }

int main() {
    B b;
    doit(b);
}

What does the following program print?

class A {
public:
    virtual void print() { std::cout << "A"; }
};

class B : public A {
public:
    void print() override { std::cout << "B"; }
};

void doit(A a) { a.print(); }

int main() {
    B b;
    doit(b);
}