许多类具有相同的构造函数

Question

我有许多类只在它们所采用的参数中相似。有没有办法更简洁/整洁地写这个？编写包含成员变量的基类会有所帮助，但我仍然需要为每个类写出构造函数。

class CommandDrawLiver {
    protected:
        int age;
        Species species;
        double r, g, b;
    public:
        CommandDrawLiver( int _age, Species _species, double _r, double _g, double _b )
          : age(_age), species(_species), r(_r), g(_g), b(_b)
          {};
};
class CommandDrawBrain {
    protected:
        int age;
        Species species;
        double r, g, b;
    public:
        CommandDrawBrain( int _age, Species _species, double _r, double _g, double _b )
          : age(_age), species(_species), r(_r), g(_g), b(_b)
          {};
};
class CommandDrawHeart {
    protected:
        int age;
        Species species;
        double r, g, b;
    public:
        CommandDrawHeart( int _age, Species _species, double _r, double _g, double _b )
          : age(_age), species(_species), r(_r), g(_g), b(_b)
          {};
};

Answer 1

假设您使用的是支持C ++ 11的编译器，那就是inheriting constructor的用途...... 检查并使用它

以下是如何应用它......

class Species{};

class CommandDraw {
    protected:
        int age;
        Species species;
        double r, g, b;

    public:
        CommandDraw( int _age, Species _species, double _r, double _g, double _b )
          : age(_age), species(_species), r(_r), g(_g), b(_b)
          {};
};

class CommandDrawLiver : public CommandDraw {
    public:
        using CommandDraw::CommandDraw;
};
class CommandDrawBrain : public CommandDraw {
    public:
        using CommandDraw::CommandDraw;
};
class CommandDrawHeart : public CommandDraw {
    public:
        using CommandDraw::CommandDraw;
};

int main() {
    CommandDrawLiver cd(34, Species(), 12, 45, 67);
    }