crfkzhyjt g

#include <iostream>

using namespace std;
class vector{
public:
    float x;
    float y;
public:
    vector (float x_,float y_) : x(x_), y(y_) { }
    void print(){
        cout << x << '\t' << y << endl;
    }
    vector add(vector b){
        return vector(x * b.x, y * b.y);
    }
    float dot (vector b){
        float v = x*b.x + y*b.y;
        return v;
    }
};


int main()
{
    vector a(1, 2);
    a.print();
    vector bbbb(4, 5);
    bbbb.print();
    vector c = a.add(bbbb);
    c.print();
    cout << a.dot(bbbb) << endl;
}