![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-53/ti_inject-812ce.png)
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: basel () {cout <<'1';} }; class base2:virtual base{ public: base2(){cout <<'2';} }; class derived:public basel,public base2{ public: derived(){cout <<'3';} }; void main() { derived obj; cout <<end1; }