下列程序的执行结果为 【13】 。
#include ＜iostream. h＞
class Point
public:
Point(double i, double j) x=i; y=j;
double Area() const return 0.0;
private:
double x, y;
;
class Rectangle: public Point
public:
Rectangle(double i, double j, double k, double 1)
double Area() const return w * h;
private:
double w, h;
;
Rectangle: :Rectangle(double i, double j, double k. double 1): Point(i,j).
w=k, h=1
void fun(Point &s)
cout＜＜s. Area()＜＜end1;
void main( )
Rectangle rec(3.0, 5.2, 15.0. 25.0);
fun(rec)