有如下程序: #inCludeiostream using namespaCe std; Class Base{ publiC: void output{Cout1;} virtual void Print{CoutB’;} }; Class Derived:publiC Base{ publiC: void output{Cout2;} void Print{Cout’D ;} }; int main { Base * ptr=new Derived; ptr一output; ptr一Print; delete ptr; retum0; } 执行这个程序的输出结果是( )。A.1BB.lDC.2BD.2D

有如下程序: #inClude<iostream> using namespaCe std; Class Base{ publiC: void output{Cout<<1;} virtual void Print{Cout<<B’;} }; Class Derived:publiC Base{ publiC: void output{Cout<<2;} void Print{Cout<<’D ;} }; int main { Base * ptr=new Derived; ptr一>output; ptr一>Print; delete ptr; retum0; } 执行这个程序的输出结果是( )。

A.1B

B.lD

C.2B

D.2D


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