#include <iostream>
using namespace std;
 
struct vector2d {
 
    vector2d(float y, float x) : y(y), x(x) {}
    vector2d() : y(-1), x(0) {}
 
    float y, x;
};
 
class Foo {
 
	public:
	    Foo() {
	        acceleration_force = vector2d();
	        //acceleration_force(); не видит конструктора вообще
	        std::cout << "acc x: " << acceleration_force.x << " y: " << acceleration_force.y << std::endl;
	    }
	private:
	    vector2d acceleration_force;
};
 
int main() {
	std::cout << "begin" << std::endl;
	Foo foo = Foo();
	return 0;
}

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