#include <cstdio>
class manko1
{
public:
double x;
};
class manko2 : public manko1
{
public:
manko2(double x) : manko1(manko1{ x })
{
}
};
auto main() -> int
{
manko2 i(3.14);
std::printf("%lf\n", i.x);
}
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