OOP – Object Oriented Programming

  class Rectangle
  {
    int length;
    int breadth;
    void area()
    {
      int a=length*breadth;
      System.out.println("Area is "+a);
    } 
    void perimeter()
    {
      int p=2*(length+breadth);
      System.out.println("Perimeter is"+p);
    }
   }
  

  class box
  {
    int L,B,H;
    void volume()
    {
      int v=L*B*H;
      System.out.println("Volume is"+v);
    }
  }
  

  class Circle
  {
    int R;
    void area()
    {
      double a=3.14*R*R;
      System.out.println("Area is "+a);
    }
    void circuimference()
    {
      double c=2*3.14*R;
      System.out.println("Circumference is"+c);
    }
  }
  

  class Set
  {
    int n1,n2,n3;
    void sum()
    {
      int s=n1+n2+n3;
      System.out.println("Sum is "+s);
    }
    void mean()
    {
      double m =(n1+n2+n3)/3.0;
      System.out.println("mean is "+m);
    }
  }
  

  class MarkSheet
  {
    int eng,hin,mar,mat,sci;
    void total()
    {
      int t=eng+hin+mar+mat+sci;
      System.out.println("Total is "+t);
    }
    void percentage()
    {
      int t=eng+hin+mar+mat+sci;
      double p=t*100/500.0;
      System.out.println("Percentage is"+p);
    }
    void result()
    {
      if(eng>=40&&hin>=40&&mar>=40&& mat>=40&&sci>=40)
        System.out.println("pass");
      else
        System.out.println("fail");
    }
  }