Cpp クラス thisポインタ 新しいページはコチラ
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自動的に作られるthisというキーワードのポインタ変数は、意図的にthisポインタと同じものを作ることができます。 | 自動的に作られるthisというキーワードのポインタ変数は、意図的にthisポインタと同じものを作ることができます。 | ||
| + | |||
| + | |||
| + | thisポインタと同じようなものを作るという意味で、プログラムを継ぎ足し変更したりして、以下のように変えてみます。 | ||
| + | |||
| + | |||
| + | ThisPointer001.h | ||
| + | <syntaxhighlight lang="cpp" line start="1"> | ||
| + | #pragma once | ||
| + | class CThisPointer001 | ||
| + | { | ||
| + | public: | ||
| + | int mpub_nValue; | ||
| + | CThisPointer001* this2; | ||
| + | void mfpub_SetThis(CThisPointer001* pCThisPointer001_this); | ||
| + | void mfpub_Output1(void); | ||
| + | |||
| + | CThisPointer001(void); | ||
| + | ~CThisPointer001(void); | ||
| + | }; | ||
| + | |||
| + | </syntaxhighlight> | ||
| + | ThisPointer001.cpp | ||
| + | <syntaxhighlight lang="cpp" line start="1"> | ||
| + | #include "stdafx.h" | ||
| + | #include "ThisPointer001.h" | ||
| + | |||
| + | void CThisPointer001::mfpub_SetThis(CThisPointer001* pCThisPointer001_this){ | ||
| + | printf("\n"); | ||
| + | printf("■CThisPointer001::mfpub_SetThis\n"); | ||
| + | |||
| + | printf("pCThisPointer001_this Address =%08x\n",pCThisPointer001_this); | ||
| + | this2 = pCThisPointer001_this; | ||
| + | printf("this Address =%08x\n",this); | ||
| + | printf("this2 Address =%08x\n",this2); | ||
| + | |||
| + | pCThisPointer001_this->mpub_nValue = 10; | ||
| + | printf("mpub_nValue =%08d\n",mpub_nValue); | ||
| + | |||
| + | this->mpub_nValue = 100; | ||
| + | printf("mpub_nValue =%08d\n",mpub_nValue); | ||
| + | |||
| + | mpub_nValue = 2000; | ||
| + | printf("mpub_nValue =%08d\n",mpub_nValue); | ||
| + | |||
| + | } | ||
| + | void CThisPointer001::mfpub_Output1(){ | ||
| + | printf("\n"); | ||
| + | printf("■CThisPointer001::mfpub_Output1\n"); | ||
| + | |||
| + | printf("this Address =%08x\n",this); | ||
| + | printf("this2 Address =%08x\n",this2); | ||
| + | printf("mpub_nValue =%08d\n",mpub_nValue); | ||
| + | |||
| + | } | ||
| + | |||
| + | CThisPointer001::CThisPointer001(void) | ||
| + | { | ||
| + | printf("\n"); | ||
| + | printf("■CThisPointer001コンストラクタ\n"); | ||
| + | printf("this Address =%08x\n",this); | ||
| + | } | ||
| + | |||
| + | |||
| + | CThisPointer001::~CThisPointer001(void) | ||
| + | { | ||
| + | } | ||
| + | |||
| + | </syntaxhighlight> | ||
| + | Sample_main.cpp | ||
| + | <syntaxhighlight lang="cpp" line start="1"> | ||
| + | #include "stdafx.h" | ||
| + | #include "ThisPointer001.h" | ||
| + | |||
| + | int _tmain(int argc, _TCHAR* argv[]) | ||
| + | { | ||
| + | CThisPointer001* CThisPointer001_Instance = new CThisPointer001; | ||
| + | |||
| + | CThisPointer001_Instance->mfpub_SetThis(CThisPointer001_Instance); | ||
| + | CThisPointer001_Instance->mfpub_Output1(); | ||
| + | |||
| + | CThisPointer001_Instance->mpub_nValue = 1000; | ||
| + | |||
| + | printf("\n"); | ||
| + | printf("■Main\n"); | ||
| + | printf("CThisPointer001_Instance Address=%08x\n",CThisPointer001_Instance); | ||
| + | |||
| + | return 0; | ||
| + | } | ||
| + | |||
| + | </syntaxhighlight> | ||
