从抽象类派生一个类(C ++) [英] Deriving a class from an abstract class (C++)

问题描述

我有一个带有纯虚函数f()的抽象类，我想创建一个从该类继承的类，并且还要重写函数f().我将头文件和cpp文件分开. 我在头文件中声明了函数f(int)，定义在cpp文件中.但是，编译器说派生类仍然是抽象的. 我该如何解决?

I have an abstract class with a pure virtual function f() and i want to create a class inherited from that class, and also override function f(). I seperated the header file and the cpp file. I declared the function f(int) in the header file and the definition is in the cpp file. However, the compiler says the derived class is still abstract. How can i fix it?

推荐答案

函数f()和f(int)没有相同的签名，因此第二个函数不会为第一个提供实现. PVF的签名和实现必须完全匹配.

The functions f() and f(int) do not have the same signature, so the second would not provide an implementation for the first. The signatures of the PVF and the implementation must match exactly.

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