【单选题】有如下程序: #include usingnamespacestd; classB{ public: B(intxx):x(xx){++count;x+=10;} virtualvoidshow( )const {cout$amp; show( ); deleteptr; return0; } 运行时的输出结果是( )。
【单选题】有如下程序: #include usingnamespacestd; classB{ public: virtualvoidshow(){cout$amp; classD:publicB{ public: voidshow(){cout$amp; }; voidfun1(B*ptr){ptr->show(); }voidfun2(B&ref){ref.show(); }voidfun3(BB){b...
【单选题】旅游业经营者必须为旅游者提供食、住、行、游、购、娱等一体化服务,体现旅游业的( )
【单选题】有如下程序: #include usingnamespacestd; classB{ public: virtualvoidshow(){cout$amp; show(); }voidfun2(B&ref){ref.show(); }voidfun3(BB){b.show(); } intmain(){ Bb,*p=newD; Dd; funl(p); fun2(b); fun3(d); retu...