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写出程序运行结果:_________#include const float PI = 3.14; class Base{public: virtual void area() = 0; virtual void perimeter() = 0;};class Rectangle:public Base{public: Rectangle(float w,float h) {width = w; height = h; } void area() {cout<<"矩形的长为:"<area(); p->perimeter(); p = &obj2; p->area(); p->perimeter(); return 0;}

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