why the division operator isn't working properly?

Question

I'm trying to calculate the length of an arc within a constructor, but when the code runs , it gives wrong output, the wrong output means the "tita" valueis set to 0.0 , when i run the code. Also i need to know why we create constructors?

I've tried modifying the code and it gives modified output only.

import java.util.*;

class Circle {
    static double radius;
    static int angle;

    public void circumference(double radius) {
        this.radius=radius;
        double pi=3.14; 
        double circum=(2*pi)*this.radius;
        System.out.println("Circumference is "+circum);     
    }

    Circle(int angl,double rad) {
        if(angl==90) {
            double pi=3.14;
            double tita=angl/360;
            System.out.println("tita is "+tita);
            double arclen=((2*pi)*rad)*tita;
            System.out.println("arc length is "+arclen);
        }
    }
}

class Circledemo {
    public static void main(String args[]) {
        Scanner scan=new Scanner(System.in);
        System.out.print("enter the radius: ");
        double radius=scan.nextDouble();
        System.out.print("enter the angle: ");
        int ang=scan.nextInt();
        Circle desi=new Circle(ang,radius);
        desi.circumference(radius);
    }
}

I expect my code to give the correctly divided value but not as 0.0

You're doing integer division. Add a `.0` or something after. — user489041, Jun 14 '19 at 18:25
the code is running ,but can you please explain this briefly? — Trouble Maker, Jun 14 '19 at 18:35
Troble maker make sure that u r Circle(int angl, double rad) as Circle(doubleangl, double rad) then you will get the expected output. constructors are used to initialize class variables. thank u — Vijaya Varma Lanke, Jun 14 '19 at 18:53

why the division operator isn't working properly?

0 Answers0