lab_4

#include <iostream>
using namespace std;
class KG {
private:
    double kg;
public:
    KG(double v) :kg(v) {};
    void show() {
        cout << kg << " кг/м3" << endl;
    }
    double getznach() {
        return kg;
    }
};
class MG {
private:
    double mg;
public:
    MG(double k) :mg(k) {};
    MG(KG kg) {
        mg = kg.getznach() / 1000;
    }
    explicit operator KG() {
        double h = mg * 1000;
        return KG(h);
    }
    void show() {
        cout << mg << " Мг/м3" << endl;
    }
};
class DM {
private:
    double dm;
public:
    DM(double k) :dm(k) {};
    DM(KG kg) {
        dm = kg.getznach() * 1000;
    }
    explicit operator KG() {
        double h = dm / 1000;
        return KG(h);
    }
    void show() {
        cout << dm << " кг/дм3" << endl;
    }
};
class G {
private:
    double g;
public:
    G(double k) :g(k) {};
    G(KG kg) {
        g = kg.getznach() * 1000000;
    }
    explicit operator KG() {
        double h = g / 1000000;
        return KG(h);
    }
    void show() {
        cout << g << " г/см3" << endl;
    }
};
int main() {
    KG kg(72);
    kg.show();
    MG mg(620000);
    mg.show();
    DM dm(0.05);
    dm.show();
    G g(30000);
    g.show();
    KG kg1 = (KG)mg;
    kg1.show();
    kg1 = (KG)dm;
    kg1.show();
    kg1 = (KG)g;
    kg1.show();
    kg1 = 100000000;
    kg1.show();
    return 0;
}