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[主观题]
有如下程序: #include<iostream> using namespace std; class Base { private: void
funlconst{tout<<”funl”;} protected: void fun2const{tout<<”fun2”;} public: void fun3const{cout<<”fhll3”;} }; class Derived:protected Base { public: void fhn4const{cout<<”filn4”;} }; int main { Derived obj; obj.funl;//① obj.fun2;//② obj.furd;//③ obj.fun4;//④ return U: } 其中有语法错误的语句是()。
A.①②③④
B.①②③
C.②③④
D.①④
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