【单选题】下面程序的运行结果是 #include<iostream.h> class base{ protected: int a public: base( ) {cout < < '0'} } class base l: virtual base{ public: base l ( ) {cout < <'1'} } class base 2: virtual base{ public: base2 (...
【单选题】下面程序的运行结果是 #include<iostream.h> class base{ protected: int a; public: base( ){cout<<'0';} }; class basel:virtual base { public: base1( ){cout<<'1';} }; class base2:virtual base{ public: