연산자 관련 소스들 (operator)

[code]#include <Turboc.h>
#include <iostream>

using namespace std;

class Time
{
    friend ostream &operator <<(ostream &c, const Time &T);
    friend ostream &operator <<(ostream &c, const Time *pT);

private:
    int hour,min,sec;

public:
    Time() { }
    Time(int h, int m, int s) { hour=h; min=m; sec=s; }
    void OutTime() {
        printf("%d:%d:%d\n",hour,min,sec);
    }
};

ostream &operator <<(ostream &c, const Time &T)
{
    c << T.hour << "시" << T.min << "분" << T.sec << "초";
    return c;
}

ostream &operator <<(ostream &c, const Time *pT)
{
    c << *pT;
    return c;
}

void main()
{
    Time A(1,1,1);
    Time *p;
    p=new Time(2,2,2);
    
    cout << "현재 시간은 " << A << "입니다." << endl;
    cout << "현재 시간은 " << p << "입니다." << endl;

    delete p;
}
[/code]
Question
Person 을 cout 할 수 있는 ostream 함수를 생성 하라
[code]
#include <Turboc.h>
#include <iostream>

using namespace std;

class Person
{
    friend ostream &operator <<(ostream &c, const Person &target);
    friend ostream &operator <<(ostream &c, const Person *target);

private:
    char *Name;
    int Age;

public:
    Person(const char *aName, int aAge)
    {
        Name = new char[strlen(aName)+1];
        strcpy(Name, aName);
        Age = aAge;
    }
    
    Person(const Person &Other)
    {
        Name = new char[strlen(Other.Name)+1];
        strcpy(Name, Other.Name);
        Age = Other.Age;
    }
    ~Person()
    {
        delete[] Name;
    }

    void OutPerson()
    {
        printf("Name : %s Age : %d\n", Name, Age);
    }
};

ostream &operator <<(ostream &c, const Person &target)
{
    c << "Name : " << target.Name << " Age : " << target.Age;
    return c;
}

ostream &operator <<(ostream &c, const Person *target)
{
    c << *target;
    return c;
}

void main()
{
    Person c("choi", 27);
    Person *d;
    d = new Person("cho", 27);

    cout << c << endl;
    cout << d << endl;

    delete d;
}
[/code]

[code]
#include <Turboc.h>
#include <IOSTREAM>

using namespace std;

class Time
{
private:
    int hour,min,sec;

public:
    Time() { }
    Time(int h, int m, int s) { hour=h; min=m; sec=s; }
    void OutTime() {
        printf("%d:%d:%d\n",hour,min,sec);
    }

    // 클래스에서 배열로 이용을 할 수 있도록 해주는 연산자로서
    // 만약에 Instance를 A로 주었다면 A[0]을 선택시 hour값을
    // 리턴하게 끔 되어 있다.
    int &operator [](int what) {
        switch (what) {
        case 0:
            return hour;
        case 1:
            return min;
        case 2:
        default:
            return sec;
        }
    }

    const int &operator [](int what) const {
        switch (what) {
        case 0:
            return hour;
        case 1:
            return min;
        default:
        case 2:
            return sec;
        }
    }
};

void main()
{
    Time A(1,1,1);
    const Time B(7,7,7);

    cout << A[0] << A[1] << A[2] << endl;

    A[0]=12;
    printf("현재 %d시입니다.\n",A[0]);
    B[0]=8;
    printf("현재 %d시입니다.\n",B[0]);
}
[/code]

[code]
#include <Turboc.h>

class StuList
{
private:
    struct Student {
        char Name[10];
        int StNum;
    } S[30];

public:
    StuList() {
        strcpy(S[0].Name,"이승만");S[0].StNum=1;
        strcpy(S[1].Name,"박정희");S[1].StNum=3;
        strcpy(S[2].Name,"전두환");S[2].StNum=6;
        strcpy(S[3].Name,"노태우");S[3].StNum=9;
        strcpy(S[4].Name,"김영삼");S[4].StNum=15;
        strcpy(S[5].Name,"김대중");S[5].StNum=17;
        strcpy(S[6].Name,"노무현");S[6].StNum=20;
        strcpy(S[7].Name,"??????");S[7].StNum=100;
    }

    // []을 응용해서 간단하게 만든 배열 indexing이다.
    // 우선은 구조체에 값을 넣어두고는 struct의 Name과 동일한
    // 인덱스 값을 찾고 찾게 된다면 StNum값을 return 하는 형식이다.
    int operator[](const char *Name) {
        for (int i=0;;i++) {
            if (strcmp(S[i].Name,Name)==0) return S[i].StNum;
            if (S[i].Name[0]=='?') return -1;
        }
    }
};

void main()
{
    StuList SL;
    printf("김영삼 학생의 학번은 %d번입니다.\n",SL["김영삼"]);
}
[/code]
[code]
#include <Turboc.h>

struct Author {
    char Name[32];
    char Tel[24];
    int Age;
};

class Book
{
private:
    char Title[32];
    Author Writer;

public:
    Book(const char *aTitle,const char *aName,int aAge) {
        strcpy(Title,aTitle);
        strcpy(Writer.Name,aName);
        Writer.Age=aAge;
    }
    Author *operator->() { return &Writer; }
    const char *GetTitle() { return Title; }
};

void main()
{
    Book Hyc("혼자 연구하는 C/C++","김상형",25);
    printf("제목:%s, 저자:%s, 저자 나이:%d세\n",Hyc.GetTitle(),Hyc->Name,Hyc->Age);
}[/code]