#include <type_traits>
#include <iostream>
 
struct Foo {
  Foo() : x(0), y(0) {}
  int x;
  int y;
};
 
struct Bar {
  Bar() = default;
  int x;
  int y;
};
 
int main()
{
    if (std::is_pod<Foo>::value) std::cout << "Foo is a POD" << std::endl;
    else                         std::cout << "Foo is *not* a POD" << std::endl;
 
    if (std::is_pod<Bar>::value) std::cout << "Bar is a POD" << std::endl;
    else                         std::cout << "Bar is *not* a POD" << std::endl;
}

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