当一个类的某个函数被说明为virtual时,在该类的所有派生类中的同原型函数()

A、都是虚函数
B、只有被重新说明时才是虚函数
C、都不是虚函数
D、只有被重新说明为virtual时才是虚函数
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正确答案:

A

答案解析:

暂无解析

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