imported>Unknown at 05:23, 7 February 2021

2021-02-07T05:23:56Z

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=== 구조체에서 클래스로 ===
struct Date
{
int d, m, y;
};

void init_date(Date *date, int d, int m, int y)
{
date->d = d;
date->m = m;
date->y = y;
}

void add_year(Date *date, int n)
{
...
}

void add_month(Date *date, int n)
{
...
}

void add_day(Date *date, int n)
{
...
}
class Date
{
int d, m, y;
public:
void init(int dd, int mm, int yy);
void add_year(int n);
void add_month(int n);
void add_day(int n);
};

void Date::init(int dd, int mm, int yy)
{
d = dd;
m = mm;
y = yy;
}

void Date::add_year(int n)
{
...
}

void Date::add_month(int n)
{
...
}

void Date::add_day(int n)
{
...
}
=== 접근 제어 ===
private - 클래스 멤버만 사용 가능
public - 외부에서도 사용 가능
=== 생성자 ===
class Date
{
int d, m, y;
public:
Date(int dd, int mm, int yy);
void add_year(int n);
void add_month(int n);
void add_day(int n);
};

Date::Date(int dd, int mm, int yy)
{
d = dd;
m = mm;
y = yy;
}
class Date
{
int d, m, y;
public:
Date();
Date(int yy);
Date(int dd, int mm, int yy);
void add_year(int n);
void add_month(int n);
void add_day(int n);
};

Date::Date()
{
d = m = y = 1;
}

Date::Date(int yy)
{
d = m = 1;
y = yy;
}

Date::Date(int dd, int mm, int yy)
{
d = dd;
m = mm;
y = yy;
}
class X
{
const int i;
Club c;
Club& pc;
public:
X(int ii, const string& n, Date d, Club& c) : i(ii), c(n, d), pc(c) {}
}
=== 소멸자 ===
class Date
{
int d, m, y;
public:
Date();
Date(int yy);
Date(int dd, int mm, int yy);
~Date();
void add_year(int n);
void add_month(int n);
void add_day(int n);
};

Date::~Date()
{
...
}
=== static 멤버 ===
* 모든 인스턴스에 의해 공유됨
* 인스턴스 없이 접근 가능
class Date
{
int d, m, y;
static Date default_date;
public:
Date();
static void set_default(int dd, int mm, int yy);
};

Date Date::default_date;

void Date::set_default(int dd, int mm, int yy)
{
default_date.d = dd;
default_date.m = mm;
default_date.y = yy;
}

Date::Date()
{
d = default_date.d;
m = default_date.m;
y = default_date.y;
}
=== const 멤버 함수 ===
class Date
{
int d, m, y;
public:
Date();
Date(int dd, int mm, int yy);
int year() const;
int month() const;
int day() const;
void add_year(int n);
void add_month(int n);
void add_day(int n);
};

int Date::year() const
{
return y;
}

int Date::month() const
{
return m;
}

int Date::day() const
{
return d;
}
=== this 포인터 ===
class Date
{
int d, m, y;
public:
void add_year(int n);
void add_month(int n);
void add_day(int n);
};

void Date::add_year(int n)
{
if(this->d == 29 && this->m == 2 && !leapyear(this->y + this->n))
{
this->d = 1;
this->m = 3;
}
this->y += this->n;
}
=== mutable ===
class Date
{
int d, m, y;
mutable bool cache_valid;
mutable string cache;
void compute_cache_value() const;
public:
Date();
string string_rep() const;
};

string Date::string_rep() const
{
if(cache_valid == false)
{
compute_cache_value();
cache_valid = true;
}
return cache;
}
----
[[OurMajorLangIsCAndCPlusPlus]]

OurMajorLangIsCAndCPlusPlus/Class - Revision history

imported>Unknown at 05:23, 7 February 2021