4/15 物件導向程式設計 練習一

class CTriangle
{
        int width;
        int height;

        void show_area(){
            System.out.println("area="+(width*height)/2);
        }
}

public class B10207081
{
    public static void main(String args[])
    {
        CTriangle tr1,tr2;
        tr1=new CTriangle();
        tr2=new CTriangle();

        tr1.width=10;
        tr1.height=5;

        tr2.width=20;
        tr2.height=10;

        tr1.show_area();
        tr2.show_area();
        System.out.println("B10207081");
    }


}