我创建了一些类:
class Base{
public:
Base(int = 0);
~Base();
Base(Base&);
Base(Derived&); //<- here
int valueOfBase();
protected:
int protectedData;
private:
int baseData;
};
class Derived: public Base{
public:
Derived(int = 0);
Derived(Derived&);
~Derived();
private:
int derivedData;
};
###//Impplementation in .cpp
Base::Base(Base& base)
{
baseData = base.baseData;
protectedData = base.protectedData;
cout << "base Copy C'tor" << endl;
}
Base::Base(Derived& hello)
{
baseData = hello.protectedData;
}
但是当我尝试编译一些代码时,我收到一个错误(靠近这里
)
expected ) before & token
我可以创建带有派生参数的基础 c'tor 来编写类似的东西吗
Derived derived(1);
Base base1 = derived;
如果没有,为什么? 提前致谢
最佳答案
您可能需要 Derived
的前向声明。
尝试在您的基类定义之上添加 class Derived;
。
关于c++ - 具有派生参数的基本c'tor,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3849451/