public class E45 {
    public static void main(String args[]){
        Rect ractangle=new Rect();
        ractangle.width=109.87;
        ractangle.height=25.18;
        double area=ractangle.getArea();
        System.out.println("矩形的面积:"+area);
        Lader lader=new Lader();
        lader.above=10.798;
        lader.bottom=156.65; 
        lader.height=18.12;
        area=lader.getArea();
        System.out.println("梯形的面积:"+area);
    }
}