public class HelloWorld{

? ? public static void main(String[] args) {

? ? int one = 10 ;

? ? ? ? int two = 20 ;

? ? ? ? //int three = 0 ; 我吧這一行注釋了。。

? ? ? ? int three = one + two ;

? ? ? ? //System.out.println(three);

? ? ? ? System.out.println(three +"==>30");

? ? ? ? System.out.println((three += one) + "==>40");

? ? ? ? System.out.println((three -= one) + "==>30");

? ? ? ? System.out.println((three *= one) + "==>300");

? ? ? ? System.out.println((three /= one) + "==>30");

? ? ? ? System.out.println((three %= one) + "==>0");

}

}