我正在尝试使用现有数据(半径，宽度和高度)计算圆和矩形的面积 . 但我有一些错误，我希望你能帮助我解决它 .
#include
#include
#include
using namespace std;
class Shape
{
public:
virtual void Draw () = 0;
virtual void MoveTo (int newx, int newy) = 0;
virtual int GetArea()const = 0;
};
class Rectangle : public Shape
{
public:
Rectangle (int x, int y, int w, int h);
virtual void Draw ();
virtual void MoveTo (int newx, int newy);
int GetArea() {return height * width;}
private:
int x, y;
int width;
int height;
};
void Rectangle::Draw ()
{
cout << "Drawing a Rectangle at (" << x << "," << y
<< "), width " << width << ", height " << height << "\n";
};
void Rectangle::MoveTo (int newx, int newy)
{
x = newx;
y = newy;
}
Rectangle::Rectangle (int initx, int inity, int initw, int inith)
{
x = initx;
y = inity;
width = initw;
height = inith;
}
class Circle : public Shape
{
public:
Circle (int initx, int inity, int initr);
virtual void Draw ();
virtual void MoveTo (int newx, int newy);
int GetArea() {return 3.14 * radius * radius;}
private:
int x, y;
int radius;
};
void Circle::Draw ()
{
cout << "Drawing a Circle at (" << x << "," << y
<< "), radius " << radius <
}
void Circle::MoveTo (int newx, int newy)
{
x = newx;
y = newy;
}
Circle::Circle (int initx, int inity, int initr)
{
x = initx;
y = inity;
radius = initr;
}
int main ()
{
Shape * shapes[2];
shapes[0] = new Rectangle (10, 20, 5, 6);
shapes[1] = new Circle (15, 25, 8);
for (int i=0; i<2; ++i) {
shapes[i]->Draw();
shapes[i]->GetArea();
}
return 0;
}