c – 静态函数重载？

是的,简单的旧虚函数.你的愿望是“静态分配的最重要的功能”.虚拟功能是静态分配的.也就是说,实现这些函数的代码只存在一次,并且只在编译/链接时固定.根据您的链接器命令,它们可能与任何其他功能一样存储在闪存中.

class I {
  public:
  virtual void doit() = 0;
  virtual void undoit() = 0;
};

class A : public I {
  public:
  virtual void doit () {
    // The code for this function is created statically and stored in the code segment
    std::cout << "Hello,";
  }
  virtual void undoit () {
    // ditto for this one
    std::cout << "HelLO,";
  }
};

class B : public I {
  public:
  int i;
  virtual void doit() {
    // ditto for this one
    std::cout << "world\n";
  }
  virtual void undoit() {
    // yes,you got it.
    std::cout << "WORLD\n";
  }
};

int main () {
   B b; // So,what is stored inside b?
        // There are sizeof(int) bytes for "i",// There are probably sizeof(void*) bytes for the vtable pointer.
        // Note that the vtable pointer doesn't change size,regardless of how
        // many virtual methods there are.
        // sizeof(b) is probably 8 bytes or so.
}