有如下程序：#include ＜iostream＞using namespace std;class Base{ private: void fun1() const {cout ＜＜ "fun1"; } protected: void fun2(

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问题有如下程序：#include ＜iostream＞using namespace std;class Base{ private: void fun1() const {cout ＜＜ "fun1"; } protected: void fun2() eonst {cout ＜＜ "fun2"; } public: void tim3() const { cout ＜＜ "fun3"; }}; class Derived: protected Base{ public: void fun4() const {cout ＜＜ "fun4"; }};int main(){Derived obj;obj.fun1();// ①obj.fun2();// ②obj.fun3();// ③obj.fun4();// ④return 0;}其中有语法错误的语句是( )。

选项 A、①②③④
B、①②③
C、②③④
D、①④

答案2

解析

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本试题收录于：二级C题库NCRE全国计算机二级分类