Lab4_new

#include <iostream>
#include <cmath>
#include <clocale>

using namespace std;

class Tbody
{
protected:
    float R;
public:
    Tbody()
    {
        this->R = 0;
    }

    Tbody(float newR)
    {
        this->R = newR;
    }
    virtual float volume(){}
    virtual float area(){}
};

class TBall: Tbody
{
public:
    TBall():Tbody(){}
    TBall(float newR):Tbody(newR){}

    virtual float volume()
    {
        return (4*3.1415926*pow(this->R,3))/3;
    }

    virtual float area()
    {
        return (4*3.1415926*pow(this->R,2));
    }
    friend ostream &operator<<(ostream &stream, TBall* obj);
    friend istream &operator>>(istream &stream, TBall** obj);
};

ostream &operator<<(ostream &stream, TBall* obj)
{
    cout<<"Радиус сферы равен "<<obj->R<<endl;
    return stream;
}

istream &operator>>(istream &stream, TBall** obj)
{
    float newR;
    cout<<"Введите радиус сферы"<<endl;
    cout<<"R=";
    cin>>newR;
    *obj = new TBall(newR);
    return stream;
}

class TCone: Tbody
{
private:
    float H;
public:
    TCone()
    {
        this->H = 0;
    }

    TCone(float newR, float newH):Tbody(newR)
    {
        this->H = newH;
    }

    virtual float volume()
    {
        return (3.1415926*pow(this->R,2)*this->H)/3;
    }

    virtual float area()
    {
        return 3.1415926*this->R*(this->R+sqrt(pow(this->R,2)+pow(this->H,2)));
    }
    friend ostream &operator<<(ostream &stream, TCone* obj);
    friend istream &operator>>(istream &stream, TCone** obj);
};

ostream &operator<<(ostream &stream, TCone* obj)
{
    cout<<"Радиус основания конуса равен "<<obj->R<<endl;
    cout<<"Высота конуса равна "<<obj->H<<endl;
    return stream;
}

istream &operator>>(istream &stream, TCone** obj)
{
    float newR, newH;
    cout<<"Введите радиус основания конуса"<<endl;
    cout<<"R=";
    cin>>newR;
    cout<<"Введите высоту конуса"<<endl;
    cout<<"H=";
    cin>>newH;
    *obj = new TCone(newR, newH);
    return stream;
}

int main()
{
    setlocale(LC_ALL,"RU");
    TBall* ball = new TBall(10);
    TCone* cone = new TCone(5,6);

    cout<<"Площадь поверщности сферы "<<ball->area()<<endl;
    cout<<"Объем шара "<<ball->volume()<<endl;

    cout<<"Площадь поверхности конуса "<<cone->area()<<endl;
    cout<<"Объем конуса "<<cone->volume()<<endl;
    system("pause");
    return 0;
}