public class exam{
        public static void main(String args[]){
            int x,y,z;
            x=1;
            y=2;
            z=3;
            x+=y;
            y%=x;
            z/=x;   
            System.out.print("\tx="+(x+=y));
            System.out.print("\ty="+y);
            System.out.print("\tz="+z);
}
}
编译出来结果是
X=5   y=2   z=1
和自己算的不一样 自己算的是
x=3   y=0    z=3

谢谢 各位了  我已经明白了