zad05

#include <iostream>
#include <cmath>

using namespace std;

class point {
    double tab[3];
public:
    point() { tab[0] = tab[1] = tab[2] = 0; }
    point(const double(&t)[3]) {
        tab[0] = t[0];
        tab[1] = t[1];
        tab[2] = t[2];
    }
    point(const double& x, const double& y, const double& z) {
        tab[0] = x;
        tab[1] = y;
        tab[2] = z;
    }
    double& operator[](size_t i) {
        return tab[i];
    }
    const double& operator[](size_t i)const {
        return tab[i];
    }
    const double distance(const point& p) const {
        double deltax = tab[0] - p[0];
        double deltay = tab[1] - p[1];
        double deltaz = tab[2] - p[2];

        return sqrt((deltax * deltax) + (deltay * deltay) + (deltaz * deltaz));
    }
    const point operator-(const point& pa) {
        return point(tab[0] - pa[0], tab[1] - pa[1], tab[2] - pa[2]);
    }
    const point operator*(const double& pa)const {
        return point(tab[0] * pa, tab[1] * pa, tab[2] * pa);
    }
    bool operator <(const point& pa) const {
        return distance(point()) < pa.distance(point());
    }
    bool operator ==(const point& pa) const {
        double eps = 1.0e-10;
        return abs(distance(point())-pa.distance(point())) < eps ? true : false;
    }
};
const point operator+(const point& la, const point& pa) {
    return point(la[0] - pa[0], la[1] - pa[1], la[2] - pa[2]);
}
const point operator*(const double& la, const point& pa) {
    return pa * la;
}

ostream& operator<<(ostream& out, const point& p) {
    return out << p[0] << " " << p[1] << " " << p[2]; //nie ma friend dlatego nie ma p.tab[1]
}
istream& operator>>(istream& in, point& p) {
    in >> p[0] >> p[1] >> p[2];
    return in;
}

int main()
{
    double x[2][3] = { {1.0, 1.0, 1.0}, {1.0, 2.0, 3.0} };
    point p1(x[0]), p2(x[1]);
    const point p3(0.4, 0.2, 0.1);

    cout << p1 << ", " << p2 << '\n';
    cout << p3[0] << ' ' << p3[1] << ' ' << p3[2] << '\n';
    cout << p1.distance(point()) << ", " << p3.distance(p1) << '\n';
    cout << p1 + p2 << '\n';
    cout << p1.operator-(p3) << '\n';
    cout << 3.14 * p2 << ", " << p2 * 3.14 << '\n';
    cout << (p3 < p1) << endl;
    cout << (p1 < p3) << ", " << (p1 == point(1.0, 1.0, 1.0)) << '\n';
    cin >> p1;
    cout << p1 << '\n';
    return 0;
}