// app4_8,簡潔表達式
public class app4_8
{
   public static void main(String args[])
   {
      int a=5,b=8;
          
      System.out.println("before compute,a="+a+",b="+b);
      a+=b;		// 計算a+=b的值
      System.out.println("after compute,a="+a+",b="+b);    
   }
}