#include <iostream>
using namespace std;
 
template<typename T>
struct Base {
	int propertyBase;
 
	T &setPropertyBase(int propertyBase) {
		this->propertyBase = propertyBase;
		return (T &) *this;
	}
};
 
struct Derived : public Base<Derived> {
	int propertyDerived;
 
	Derived &setPropertyDerived(int propertyDerived) {
		this->propertyDerived = propertyDerived;
		return *this;
	}
};
 
int main() {
	Derived derived = Derived()
			.setPropertyDerived(77)
			.setPropertyBase(7);
	cout << derived.propertyBase << endl;
	cout << derived.propertyDerived << endl;
	return 0;
}

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