java switch example

public class Switch0721 {

    public static void main(String[] args){

        System.out.println ( "chicken you're so beautiful ...");

        java.util.Scanner s1=new java.util.Scanner(System.in);

        System.out.print ( "Please enter the first number:");

        int a=s1.nextInt();

        java.util.Scanner s=new java.util.Scanner(System.in);

        System.out.print ( "Please enter symbols:");

        String b=s.next();

        java.util.Scanner s2=new java.util.Scanner(System.in);

        System.out.print ( "Please enter the second number:");

        int c = s2.nextInt ();

        int d=0;

        switch(b){

            case "+":

            //System.out.println(a + c);

            d=Math.abs(a+c);

            System.out.println ( "score calculation:" + d);

            break;

            case "-":

            //System.out.println(a - c);

            d=Math.abs(a-c);

            System.out.println ( "score calculation:" + d);

            break;

            case"*":

            d=Math.abs(a*c);

            System.out.println ( "score calculation:" + d);

            break;

            case "/":

            d=Math.abs(a/c);

            System.out.println ( "score calculation:" + d);

            break;

            default :

            System.out.println ( "you have the operation errors, please re-enter!");

        }

    }

}