#include <cstdio>
class A {
public:
int n;
A();
~A();
};
A::A() = default;
A::~A() = default;
class B {
public:
int n;
B() = default;
~B() = default;
};
int main() {
A a;
B b;
printf("A: %d; B: %d\n", a.n, b.n);
return 0;
}
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