#include <iostream>

using namespace std;


class Person {

int id;

double weight;

string name;

public:

void show() { cout << id << ' ' << weight << ' ' << name << endl; }

Person(int id = 1, string name = "grace", double weight = 32.5 );

};


int main() {

Person grace, ashley(2, "Ashley"), helen(3, "Helen", 32.5);

grace.show();

ashley.show();

helen.show();

}


C++ 인데 왜 실행이 안되는것?? 


외부에서 참조할수없다는데 어케해야함