C++ 指向不同派生类的指针数组

我正在为一系列基于ATMEGA328P的微处理器单元开发核心。我需要将一个基类和两个派生类混合存储在一个数组中。我有以下资料：

// base class
class Channel {
   virtual String ReturnValuesAsString();
   virtual void ResetValues();
   ...
}

// derived class
class DigitalChannel : Channel {
   String ReturnValuesAsString() override;
   void ResetValues() override;
}

// derived class
class AnalogChannel : Channel {
   String ReturnValuesAsString() override;
   void ResetValues() override;
}

class Input {
   Channel *Channels; //array of channels

   Input(int totalPossibleChannels, Channel *channels[]) {

      this->Channels = new Channel[totalPossibleChannels];

      // pseudocoded for loop using 'chanIndex' iterator to keep it short on this post
      for channel in channels {
         this->Channels[chanIndex] = *channels[chanIndex];
      }
   }
}

input0.Channels[0].ReturnValuesAsString();

在我的另一个对象上，我有以下内容：

// base class
class Channel {
   virtual String ReturnValuesAsString();
   virtual void ResetValues();
   ...
}

// derived class
class DigitalChannel : Channel {
   String ReturnValuesAsString() override;
   void ResetValues() override;
}

// derived class
class AnalogChannel : Channel {
   String ReturnValuesAsString() override;
   void ResetValues() override;
}

class Input {
   Channel *Channels; //array of channels

   Input(int totalPossibleChannels, Channel *channels[]) {

      this->Channels = new Channel[totalPossibleChannels];

      // pseudocoded for loop using 'chanIndex' iterator to keep it short on this post
      for channel in channels {
         this->Channels[chanIndex] = *channels[chanIndex];
      }
   }
}

input0.Channels[0].ReturnValuesAsString();

我按如下方式初始化输入：

DigitalChannel digitalChannel00 = DigitalChannel();
DigitalChannel digitalChannel01 = DigitalChannel();

Channel *digitalInputChannelsInput0[] = { &digitalChannel00, &digitalChannel01 };

Input input0 = Input(2, digitalInputChannelsInput0);

DigitalChannel digitalChannel00 = DigitalChannel();
DigitalChannel digitalChannel01 = DigitalChannel();

Channel *digitalInputChannelsInput0[] = { &digitalChannel00, &digitalChannel01 };

Input input0 = Input(2, digitalInputChannelsInput0);

我的问题是，当我引用与以下类似的任何通道时：

// base class
class Channel {
   virtual String ReturnValuesAsString();
   virtual void ResetValues();
   ...
}

// derived class
class DigitalChannel : Channel {
   String ReturnValuesAsString() override;
   void ResetValues() override;
}

// derived class
class AnalogChannel : Channel {
   String ReturnValuesAsString() override;
   void ResetValues() override;
}

class Input {
   Channel *Channels; //array of channels

   Input(int totalPossibleChannels, Channel *channels[]) {

      this->Channels = new Channel[totalPossibleChannels];

      // pseudocoded for loop using 'chanIndex' iterator to keep it short on this post
      for channel in channels {
         this->Channels[chanIndex] = *channels[chanIndex];
      }
   }
}

input0.Channels[0].ReturnValuesAsString();

我得到的是该方法的基类实现，而不是派生实现。我读过一些关于这方面的文章，似乎这是由对象切片将它们提取到基类引起的。我还有别的办法处理吗？我无法在这个平台上访问智能指针或向量（arduino是c++的有限端口）。提前谢谢！我也愿意接受任何建议

更新：将此标记为已解决，但我想添加更多上下文以帮助其他人 以下是新结构：

class Input {
   Channel **Channels; //array of channel pointers

   Input(int totalPossibleChannels, Channel *channels[]) {

      this->Channels = new Channel *[totalPossibleChannels];

      // pseudocoded for loop using 'chanIndex' iterator to keep it short on this post
      for channel in channels {
         this->Channels[chanIndex] = channels[chanIndex];
      }
   }
}

我按如下方式初始化输入：

DigitalChannel digitalChannel00 = DigitalChannel();
DigitalChannel digitalChannel01 = DigitalChannel();

Channel *digitalInputChannelsInput0[] = { &digitalChannel00, &digitalChannel01 };

Input input0 = Input(2, digitalInputChannelsInput0);

DigitalChannel digitalChannel00 = DigitalChannel();
DigitalChannel digitalChannel01 = DigitalChannel();

Channel *digitalInputChannelsInput0[] = { &digitalChannel00, &digitalChannel01 };

Input input0 = Input(2, digitalInputChannelsInput0);

---

您正在维护一组通道OBEJCT。
要使虚拟函数工作，您需要维护基类类型的指针或引用

Channel *Channels;

创建通道OBEJCT的数组。您需要创建指向通道对象的指针/引用数组，即

Channel **Channels;

---

相应地更改程序，以使用指针而不是通道类型的对象。

然后我是否会使用

input0.Channels[0]->ReturnValuesAsString（）指针数组修复后，从那时起？@PhillipMcMullen是。这就是使用指向对象的指针访问成员的方式。