#include <iostream>
#include <math.h>

using namespace std;

class Line {
    public:
        Line(float _x1, float _y1, float _x2, float _y2) {
            x1 = _x1;
            x2 = _x2;
            y1 = _y1;
            y2 = _y2;
            slope = (_y2 - _y1) / (_x2 - _x1);
            length = sqrt(pow(_x2 - _x1, 2) + pow(_y2 - _y1, 2));
        }
        bool parallel(Line& line) {
            return line.slope == slope;
        }
        float slope, length, x1, x2, y1, y2;
};

int main() {
    Line one(0, 0, 2, 2);
    Line two(5, 5, 10, 10);

    cout << one.parallel(two);
}