2011년 4월 13일 수요일

cpp] 예제로 바로 알아보는 c와 c++ - 49

#include <iostream.h>
class A {
 int no;
public:
 A();
 A(int n);
 void output(void);
};
A::A()
{
}
A::A(int n)
{
 no = n;
}
void A::output(void)
{
 cout << no << endl;
}
class B {
 char ch;
 A aa;
public:
 B();
 B(char c, int n);
 void output(void);
};
B::B()
{
}
B::B(char c, int n):aa(n) //명시적 콜론 초기화
{
 ch= c;

}
void B::output(void)
{
 cout << ch;
 aa.output();
}
void main(void)
{
 B bb;
 bb.output();
}
------------------------------------------- ----------------------------------
#include <iostream.h>
class A {
 int no;
public:
 A();
 A(int n);
 void output(void);
};
A::A()
{
}
A::A(int n)
{
 no = n;
}
void A::output(void)
{
 cout << no << endl;
}
class B {
 char ch;
 A aa;
public:
 B();
 B(char c, int n);
 void output(void);
};
B::B()
{
}
B::B(char c, int n):aa(n), ch(c) //명시적 콜론 초기화
{

}
void B::output(void)
{
 cout << ch;
 aa.output();
}
void main(void)
{
 B bb;
 bb.output();
}
-----------------------------------------------------------------------------
#include <iostream.h>
class A {
 int no;
public:
 A();
 A(int n);
 void output(void);
};
A::A()
{
}
A::A(int n)
{
 no = n;
}
void A::output(void)
{
 cout << no << endl;
}
class B {
 char ch;
 A aa;
public:
 B();
 B(char c, int n);
 void output(void);
};
B::B()
{
}
B::B(char c, int n):aa() //안 적으면 묵시적으로 요렇게 붙음.
{
 ch = c;
 aa = A(n); //임시객체를 생성함.
}
void B::output(void)
{
 cout << ch;
 aa.output();
}
void main(void)
{
 B bb;
 bb.output();
}
생성자 불러서 초기화 //권하지 않음. 쓸대없는 임시 오프젝트가 만들어짐.
-----------------------------------------------------------------------------
#include <iostream.h>
class A {
 int no;
public:
 A();
 ~A();
 A(int n);
 void output(void);
};
A::A()
{
}
A::~A()
{
 cout << "A distructor" << endl;
}

A::A(int n)
{
 no = n;
}
void A::output(void)
{
 cout << no << endl;
}
class B {
 char ch;
 A aa;
public:
 B();
 ~B();
 B(char c, int n);
 void output(void);
};
B::B()
{
}
B::~B()
{
 cout << "B distructor" << endl;
}

B::B(char c, int n):aa(n), ch(c) //명시적 콜론 초기화
{
 ch = c;
 aa = A(n); //임시객체를 생성함.
}
void B::output(void)
{
 cout << ch;
 aa.output();
}
void main(void)
{
 B bb;
 bb.output();
}
-----------------------------------------------------------------------------
#include <iostream.h>
class A {
 int no;
public:
 A();
 ~A();
 A(int n);
 void output(void);
};
A::A()
{
}
A::~A()
{
 cout << "A distructor" << endl;
}

A::A(int n)
{
 no = n;
}
void A::output(void)
{
 cout << no << endl;
}
class B {
 char ch;
 A aa;
public:
 B();
 ~B();
 B(char c, int n);
 void output(void);
};
B::B()
{
}
B::~B()
{
 cout << "B distructor" << endl;
}

B::B(char c, int n):aa(n), ch(c) //명시적 콜론 초기화
{
 ch = c;
 aa = A(n); //임시객체를 생성함.
}
void B::output(void)
{
 cout << ch;
 aa.output();
}
void main(void)
{
 B bb;
 bb.output();
}
-----------------------------------------------------------------------------
#include <iostream.h>
class A {
 int no;
public:
 A();
 ~A();
 A(int n);
 void output(void);
};
A::A()
{
}
A::~A()
{
 cout << "A distructor" << endl;
}

A::A(int n)
{
 no = n;
}
void A::output(void)
{
 cout << no << endl;
}
class B {
 char ch;
 char &rch;
 A aa;
public:
 B();
 ~B();
 B(char c, int n);
 void output(void);
};
B::B():rch(ch)
{
}
B::~B()
{
 cout << "B distructor" << endl;
}

B::B(char c, int n):aa(n), ch(c), rch(ch) //명시적 콜론 초기화
{
 ch = c;
 aa = A(n); //임시객체를 생성함.
}
void B::output(void)
{
 cout << ch;
 aa.output();
}
void main(void)
{
 B bb;
 bb.output();
}
-----------------------------------------------------------------------------
#include <iostream.h>
class A {
 int no;
public:
 A();
 ~A();
 A(int n);
 void output(void);
};
A::A()
{
}
A::~A()
{
 cout << "A distructor" << endl;
}

A::A(int n)
{
 no = n;
}
void A::output(void)
{
 cout << no << endl;
}
class B {
 char ch;
 char &rch;
 A aa;
public:
 B();
 ~B();
 B(char c, int n);
 void output(void);
};
B::B():rch(ch)
{
}
B::~B()
{
 cout << "B distructor" << endl;
}

B::B(char c, int n):aa(n), ch(c), rch(ch) //명시적 콜론 초기화
{
 ch = c;
 aa = A(n); //임시객체를 생성함.
}
void B::output(void)
{
 cout << ch;
 aa.output();
}
void main(void)
{
 B bb;
 bb.output();
}

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