#include <iostream>
#include <vector>
 
class A {
public:
    void talk() { printf("A\n"); }
};
 
class B: public A {
public:
    void talk() { printf("B\n"); }
};
 
int main(void) {
    std::vector<A> vec;
    std::vector<A*> vec2;
    A a;
    B b;
    a.talk();
    b.talk();
 
    std::cout << "---------------" << std::endl;
    std::cout << "Will always output 'A' as slicing occurs:" << std::endl;
 
    vec.push_back(a);
    vec.push_back(b);
    vec2.push_back(&a);
    vec2.push_back(&b);
 
    for (auto& c : vec) {
        c.talk();
    }
 
    std::cout << "---------------" << std::endl;
    std::cout << "Will make polymorphic call if 'virtual' specifier is enabled:" << std::endl;
 
    for (auto& c : vec2) {
        c->talk();
    }
 
}

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