写出程序运行结果:_________#include class Arr{ int *a,n;public: Arr():a(0),n(0) {} Arr(int *aa, int nn) {n=nn;a=new int[n];for(int i=0;i
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写出程序运行结果:_________#include class A{public: A() {cout<<"A构造函数"<
写出程序运行结果:_________#include class Bas{public: ~Bas() {cout<<"Bas construct"<f();}
写出程序运行结果:_________#include class A{public: A() {cout<<"As cons."<g(); delete a;}
写出程序运行结果:_________#include class shape {public: virtual int area() {return 0; }};class rectangle:public shape {public: int a, b; void setLength (int x, int y) {a=x;b=y; } int area() {return a*b; }}; void main() { rectangle r; r.setLength(10,5); shape s1; shape &s2=r; cout <