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消除下述代码 compile 阶段语法错误的方式为 class A { public: virtual int f() = 0; }; int main() { A a; (&a) -> f(); }

A.将第3行代码中的virtual关键字去掉

B.将第3行代码中的 = 0; 改为 {}

C.将第6行及第7行代码删除

D.将第7行改为 a.f();

E.将第3行代码中的 = 0 去掉


参考答案和解析
将第3行代码中的 = 0; 改为 {};将第6行及第7行代码删除;将第3行代码中的 = 0 去掉
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