ПОМОГИТЕ С КОДОМ С++

 #include  

 

using namespace std; 

 

class Shape { 

protected: 

    static inline const auto pi = 3.1415926535897932; 

    double a; 

    Shape(const double a) : a(a) {} 

public: 

    virtual double area()const = 0; 

    virtual bool more(const Shape*)const = 0; 

    ~Shape() {} 

}; 

 

struct Square : virtual public Shape { 

    Square(const double a) : Shape(a) {} 

    double area()const override { 

        return a * a; 

    } 

    bool more(const Shape* p_shape)const override { 

        return area() > p_shape->area(); 

    } 

}; 

 

struct Circle : virtual public Shape { 

    Circle(const double a) : Shape(a) {} 

    double area()const override { 

        return pi * a * a; 

    } 

    bool more(const Shape* p_shape)const override { 

        return area() > p_shape->area(); 

    } 

}; 

 

int main() { 

    Square a{ 2.5 }; 

    Square b{ 3.0 }; 

    Square c{ 3.5 }; 

    Circle d{ 1.5 }; 

    constexpr const char smc[]{ "The square is bigger than the circle" }; 

    constexpr const char cms[]{ "The circle is bigger than the square" }; 

    while (true) { 

        cout > variant; 

        switch (variant) { 

            case 1: puts(a.more(&d) ? smc : cms); break; 

            case 2: puts(b.more(&d) ? smc : cms); break; 

            case 3: puts(c.more(&d) ? smc : cms); break; 

            default: puts("Error!"); 

        } 

    } 

} 

 #include  

using namespace std; 

 

int main() { 

    double a, R; 

    cout > a; 

    cout > R; 

 

    double squareArea = a * a; 

    double circleArea = 3.14 * R * R; 

 

    if (squareArea > circleArea) { 

        cout

 #include  

#include  

 

using namespace std; 

 

int main() 

{ 

    float a, R; 

    cout > a >> R; 

 

    int choice; 

    cout > choice; 

 

    switch(choice) 

    { 

        case 1: 

            // вычисляем площадь первого квадрата 

            cout  sr) 

                cout  s1) 

                cout