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c++ - 创建构造函数时未解析的外部符号

转载 作者：行者123 更新时间：2023-11-30 01:34:08 25 4
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<分区>

删除构造函数行后错误消失。

Dog::Dog(std::string name, double height, double weight, std::string sound) : Animal(name, height, weight) {
    this -> sound = sound;
}


void Dog::ToString() {
    //std::cout << this->name << " is " << this->height << " cm's tall and " << this->weight << " kg's in weight" << std::endl;
    //cannot do the line above as it is private, if it were to be protected we could call it. "sharing with childs of class"

    std::cout << GetName() << " is " << GetHeight() << " cm's tall and " << GetWeight() << " kg's in weight" << std::endl;
}

enter image description here 

class Animal {
private:    
    std::string name;
    double height;
    double weight;


    static int numOfAnimals;
    static bool canTalk;

public:
    std::string GetName() {
        return name;
    }

    double GetHeight() {
        return height;
    }

    double GetWeight() {
        return weight;
    }

    void SetName(std::string name) {
        this->name = name;
    }

    void SetHeight(double height) {
        this->height = height; //height that is passed in through parameter becomes the height
    }
    void SetWeight(double weight) {
        this->weight = weight;
    }

    void SetAll(std::string, double, double); 

    Animal(std::string, double, double); //constructor
    Animal(); //for when no parameters are passed
    ~Animal(); //destructor

    static int GetNumOfAnimals() {
        return numOfAnimals;
    }
    void ToString();
};

@inisheer 要求的动物类的代码和构造函数

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