명품 C++ Programming 실습문제 6장 2번

AP2_(1).cpp

#include <iostream>
#include <string>
using namespace std;
 
class Person {
    int id;
    double weight;
    string name;
public:
    Person() { id = 1; weight = 20.5; name = "Grace"; }
    Person(int id, string name) { this->id = id; this->name = name; weight = 20.5; }
    Person(int id, string name, double weight) { this->id = id; this->name = name; this->weight = weight; }
    void show() { cout << id << ' ' << weight << ' ' << name << endl; }
};
 
int main() {
    Person grace, ashley(2, "Ashley"), helen(3, "Helen", 32.5);
    grace.show();
    ashley.show();
    helen.show();
}

AP2_(2).cpp

#include <iostream>
#include <string>
using namespace std;
 
class Person {
    int id;
    double weight;
    string name;
public:
    Person(int id = 1, string name = "Grace", double weight = 20.5) { this->id = id; this->name = name; this->weight = weight; }
    void show() { cout << id << ' ' << weight << ' ' << name << endl; }
};
 
int main() {
    Person grace, ashley(2, "Ashley"), helen(3, "Helen", 32.5);
    grace.show();
    ashley.show();
    helen.show();
}