20141010 (C++ this)

155일차

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C++

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------- this

현재 객체를 가리킨다

(객체 주소)

예제)

#include <iostream>

#include <cstring>

using namespace std;

class SoSimple

{

public:

int num;

public:

SoSimple(int n)

: num(n)

{

cout << "num=" << num << ", ";

cout << "address=" << this << endl;

}

void ShowSimpleData()

{

cout << num << endl;

}

SoSimple * GetThisPointer()

{

return this;

}

};

int main()

{

SoSimple sim1(100);

SoSimple * ptr1 = sim1.GetThisPointer();

cout << ptr1 << ", ";

ptr1->ShowSimpleData();

SoSimple sim2(200);

SoSimple * ptr2 = sim2.GetThisPointer();

cout << ptr2 << ", ";

ptr2->ShowSimpleData();

return 0;

}

결과

다른 예제)

#include <iostream>

using namespace std;

class SelfRef

{

private:

int num;

public:

SelfRef(int n)

: num(n)

{

cout << "객체생성" << endl;

}

SelfRef & Adder(int n)

{

num = num + n;

return *this;

}

SelfRef & ShowTwoNumber()

{

cout << num << endl;

return *this;

}

};

int main()

{

SelfRef obj(3);

SelfRef & ref = obj.Adder(2);

obj.ShowTwoNumber();

ref.ShowTwoNumber();

ref.Adder(1).ShowTwoNumber().Adder(2).ShowTwoNumber();

return 0;

}

결과

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RFID

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beep.txt

ISO15693-HostCommand.pdf