Interface for Rectangle

#include <iostream>
#include <iomanip>
using namespace std;
class Area
{
  public:
  float getArea(float l,float h);
};

float Area::getArea(float l,float h)
{
  return l*h;
}

class Perimeter
{
  public:
  float getPerimeter(float x,float y)
    {
      return (float)2*(x+y);
    }
};

class Rectangle:public Area,public Perimeter
{
 
};
int main() {
float l,b;
  Rectangle rt;
  cin>>l>>b;
  cout<<rt.getArea(l,b)<<endl;
  cout<< std::fixed << setprecision(2) << rt.getPerimeter(l,b);
return 0;
}