wchar_t*,wchar_t,wchat_t数组,char,char*,char数组,std::string,std::wstring,CString....

原文引用：http://hi.baidu.com/harbinxxh/blog/item/1f8b721caaedd5dcc2ce794f.html

 

参考：http://www.cnitblog.com/textbox/archive/2010/03/16/64672.aspx

 

一些转换函数，主要针对宽字符。字符串是根本啊，要好好掌握了
WideCharToMultiByte(CP_UTF8, 0, hostname.AllocSysString(), -1, str, 100, NULL, NULL);

#include <string>// 使用CString必须使用MFC，并且不可包含<windows.h>#define _AFXDLL#include <afx.h>using namespace std;//----------------------------------------------------------------------------------//将 单字节char* 转换为 宽字节 wchar*inline wchar_t* AnsiToUnicode( const char* szStr ){int nLen = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, NULL, 0 );if (nLen == 0){   return NULL;}wchar_t* pResult = new wchar_t[nLen];MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, pResult, nLen );return pResult;}//----------------------------------------------------------------------------------// 将 宽字节wchar_t* 转换 单字节char*inline char* UnicodeToAnsi( const wchar_t* szStr ){int nLen = WideCharToMultiByte( CP_ACP, 0, szStr, -1, NULL, 0, NULL, NULL );if (nLen == 0){   return NULL;}char* pResult = new char[nLen];WideCharToMultiByte( CP_ACP, 0, szStr, -1, pResult, nLen, NULL, NULL );return pResult;}//----------------------------------------------------------------------------------// 将单字符 string 转换为宽字符 wstringinline void Ascii2WideString( const std::string& szStr, std::wstring& wszStr ){int nLength = MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, NULL, NULL );wszStr.resize(nLength);LPWSTR lpwszStr = new wchar_t[nLength];MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, lpwszStr, nLength );wszStr = lpwszStr;delete [] lpwszStr;}//----------------------------------------------------------------------------------int _tmain(int argc, _TCHAR* argv[]){char*   pChar = "我喜欢char";wchar_t* pWideChar = L"我讨厌wchar_t";wchar_t   tagWideCharList[100] ;char   ch = 'A';char   tagChar[100] = {NULL};CString   cStr;std::string str;// 注：设置语言环境以便输出WideCharsetlocale(LC_ALL,"chs");// 注： char* 转换 wchar_t*// 注： wchar_t 未重载 << ，所以不可使用 cout << 输出pWideChar = AnsiToUnicode( pChar );// 注：printf("%ls") 和 wprintf(L"%s") 一致printf( "%ls\n", pWideChar );// 注：wchar_t* 转换 wchar_t[]wcscpy ( tagWideCharList, pWideChar );wprintf( L"%s\n", tagWideCharList );// 注：wchar_t[] 转换 wchar_t*pWideChar = tagWideCharList;wprintf( L"%s\n", pWideChar );// 注：char 转换 stringstr.insert( str.begin(), ch );cout << str << endl;// 注：wchar_t* 转换 stringpWideChar = new wchar_t[str.length()];swprintf( pWideChar, L"%s", str.c_str());wprintf( L"%s\n", pWideChar );// 注：string 转换 char*pChar = const_cast<char*>(str.c_str());cout << pChar << endl;// 注：char* 转换 stringstr = std::string(pChar);// 注： cout 的 << 重载了string, 若printf 的话必须 printf("%s", str.c_str());//   而不可 print( "%s", str ); 因为 str 是个 string 类cout << str << endl;// 注：string 转换 char[]str = "无聊啊无聊";strcpy( tagChar, str.c_str() );printf( "%s\n", tagChar );// 注：string 转换 CString;cStr = str.c_str();// 注：CString 转换 stringstr = string(cStr.GetBuffer(cStr.GetLength()));// 注：char* 转换 CStringcStr = pChar;// 注：CString 转换 char*pChar = cStr.GetBuffer( cStr.GetLength() );// 注：CString 转换 char[]strncpy( tagChar, (LPCTSTR)CString, sizeof(tagChar));// 注：CString 转换 wchar_t*pWideChar = cStr.AllocSysString();printf( "%ls\n", pWideChar );}