2023.5.23

 

#include <iostream>
#include <iomanip>
using namespace std;
float PI = 3.14159f;
class Shape
{
public:
    virtual float getArea() = 0;
};
class Circle :public Shape
{
public:
    float r;
    float getArea()
    {
        return PI * r * r;
    }
};
class Square :public Shape
{
public:
    float x;
    float getArea()
    {
        return x * x;
    }
};
class Rectangle :public Shape
{
public:
    float w, l;
    float getArea()
    {
        return w * l;
    }
};
class Trapezoid :public Shape
{
public:
    float s, x, h;
    float getArea()
    {
        return (s + x) * h / 2;
    }
};
class Triangle :public Shape
{
public:
    float d, h;
    float getArea()
    {
        return (d * h) / 2;
    }
};
void test01()
{
    Circle c;
    Square s;
    Rectangle r;
    Trapezoid t;
    Triangle a;
    cin >> c.r >> s.x >> r.w >> r.l >> t.s >> t.x >> t.h >> a.d >> a.h;
    Shape* arr[5] = { &c,&s,&r,&t,&a };
    float sumArea = 0;
    for (int i = 0; i < 5; i++)
    {
        sumArea = sumArea + arr[i]->getArea();
    }
    cout <<fixed<<setprecision(3)<< sumArea << endl;
}
int main()
{
    test01();
    return 0;
}