构造函数相关，cpp问题

不知道哪里出错了

#include 
#include 
using namespace std;

class Animal{
private:
    string a;
    int b;
    string c;
    string d;
    Animal(string name, int age, string color, string feature){
        a = name;
        b = age;
        c = color;
        d = feature;
    }
public:
    void show(){
        cout << "我是一只" << a << "的" << b << "，今年" << c << "岁了，我能" << d << "。" << endl;
    }
};




int main()
{
    string name;
    int age;
    string color;
    string feature;
    cin >> name >> age >> color >> feature;
    Animal obj(name, age, color, feature);
    obj.show();
    return 0;
}

报错内容为[Error] 'Animal::Animal(std::string, int, std::string, std::string)' is private within this context

11行前面加个public:
否则构造函数也是私有函数了啊