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| #include <iostream>
#include <string>
#include <cmath>
#include <fstream>
using namespace std;
ifstream in("in.txt");
ofstream out ("out.txt");
class Figure
{
public:
virtual void Show() = 0;
virtual double Area() = 0;
virtual double Perimeter() = 0;
virtual void Info() = 0;
};
class Rectangle : public Figure
{
protected:
double a;
double b;
public:
Rectangle() : a(0), b(0) {}
Rectangle(double a, double b) : a(a), b(b) {}
void Show()
{
out << "Rectangle: ";
out << "(" << a << ", " << b << ")" << endl;
out << "Perimeter: " << Perimeter() << endl;
out << "Area: " << Area() << endl;
}
void Info()
{
if (a == b)
out << "It's square";
else
out << "Rectangle";
}
double Perimeter()
{
return 2 * (a + b);
}
double Area()
{
return a * b;
}
double GetA()
{
return a;
}
double GetB()
{
return b;
}
};
class Triangle : public Figure
{
protected:
double a;
double b;
double c;
public:
Triangle() : a(0), b(0), c(0) {}
Triangle(double a, double b, double c) : a(a), b(b), c(c) {}
void Show()
{
out << "Triangle: ";
out << "(" << a << "," << b << "," << c << ")" << endl;
out << "Perimeter: " << Perimeter() << endl;
out << "Area: " << Area() << endl;
}
double Perimeter()
{
return a + b + c;
}
double Area()
{
return sqrt((Perimeter() / 2)*((Perimeter() / 2) - a)*((Perimeter() / 2) - b)*((Perimeter() / 2) - c));
}
void Info()
{
if (a == b && b == c && a == c)
out << "Triangle equilateral" << endl;
else
if (a == b || a == c || b == c)
out << "Triangle isosceles" << endl;
}
double GetA()
{
return a;
}
double GetB()
{
return b;
}
double GetC()
{
return c;
}
};
class Point
{
protected:
double a;
double b;
public:
Point() : a(0), b(0) {}
Point(double a, double b) : a(a), b(b) {}
void SetAB(double a, double b)
{
this->a = a;
this->b = b;
}
double GetA()
{
return a;
}
double GetB()
{
return b;
}
void Show()
{
out << "Point: ";
out << " (" << a << ", " << b << ")" << endl;
}
};
class Circle : public Figure
{
protected:
Point *k;
int radius;
public:
Circle() : radius(0)
{
k = new Point();
}
Circle(int a, int b, int radius) : radius(radius)
{
k = new Point(a, b);
}
void Show()
{
out << "Circle: " << endl;
out << "Center: (" << k->GetA() << ", " << k->GetB() << "), " << endl;
out << "Radius: " << radius << endl;
out << "Perimeter: " << Perimeter() << endl;
out << "Area: " << Area() << endl;
}
void Info()
{
out << "Circle" << endl;
}
double Perimeter()
{
return 2 * 3.1415 * radius;
}
double Area()
{
return 3.1415 * (radius*radius);
}
~Circle()
{
delete k;
}
};
int main()
{
Figure *objects[3];
objects[0] = new Circle(0, 0, 3);
objects[1] = new Triangle(2, 2, 3);
objects[2] = new Rectangle(4, 5);
for (int i = 0; i <= 2; i++)
{
objects[i]->Show();
}
for (int i = 0; i <= 2; i++)
{
delete objects[i];
}
out.close();
return 0;
} |
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