还是不知道哪里出了问题

   int one = 10 ;

        int two = 20 ;

        int three = 0 ;

        three=one+two;

        System.out.println(＂three=one+two==>＂+three);

        three+=one;

        System.out.println(＂three+=one==>＂+three);

        three-=one;

        System.out.println(＂three-=one==>＂+three);

        three*=one;

        System.out.println(＂three*=one==>＂+three);

        three/=one;

        System.out.println(＂three/=one==>＂+three);

        three%=one;

        System.out.println(＂three%=one==>＂+three);