Ass 3 SHAPE

import java.util.Scanner;

abstract class Shape{
    public float area, perimeter;
    abstract public void area();
    abstract public void perimeter();
}

class Rectangle extends Shape{
    private int length;
    private int breadth;
    Scanner sc = new Scanner(System.in);

    public void area(){
        System.out.println("Enter the length and breadth of rectangle");
        length = sc.nextInt();
        breadth = sc.nextInt();
        area = length * breadth;
        System.out.println("Length: " + length + " Breadth: " + breadth);
        System.out.println("The area of rectangle is:" + area);
    }

    public void perimeter(){
        System.out.println("Enter the length and breadth of rectangle");
        length = sc.nextInt();
        breadth = sc.nextInt();
        perimeter = 2 * (length + breadth);
        System.out.println("The perimeter is: " + perimeter);
    }
}

class Triangle extends Shape{
    private float base;
    private float height;

    Scanner sc = new Scanner(System.in);

    public void area(){
        System.out.println("Enter the base and height of triangle: ");
        base = sc.nextInt();
        height = sc.nextInt();
        area = (base * height/2);
        System.out.println("Base: " + base + " Height: " + height);
        System.out.println("The area of Triangle is:" + area);
    }

    public void perimeter(){
        System.out.println("Enter the base and height of triangle: ");
        base = sc.nextInt();
        height = sc.nextInt();
    }
}

class Circle extends Shape{
    private int radius;

    Scanner sc = new Scanner(System.in);

    public void area(){
        System.out.println("Enter the radius of circle:");
        radius = sc.nextInt();
        area= (22/7) * radius * radius;
        System.out.println("Radius: " + radius);
        System.out.println("The area of Circle is:" + area);
    }

    public void perimeter(){
        System.out.println("Enter the radius of circle:");
        radius = sc.nextInt();
        perimeter = 2 * (22/7) * radius;
        System.out.println("The perimeter is: " + perimeter);
    }
}

public class shapearea
{
 public static void main(String[] args)
{
    Rectangle r = new Rectangle();
    r.area();
     Triangle t = new Triangle();
     t.area();
    Circle c = new Circle();
    c.area();
}
}