将char类型的字符数组转换成为wchar_t类型的数组，在线等

[zhangjundriver]

WSABUF DataBuf;
		DataBuf.buf = new char[200];
		DataBuf.len = 200;

		DWORD dwRead;
		DWORD dwFlag = 0;
		
		SOCKADDR_IN addr_from;
		int len = sizeof(SOCKADDR);

		CString str;
		CString strtemp;
		wchar_t charBuf[20];
		
		WSARecvFrom(m_socket,(LPWSABUF)&DataBuf,1,&dwRead,&dwFlag,(SOCKADDR*)&addr_from,&len,NULL,NULL);
		
		charBuf = A2W(inet_ntoa(addr_from.sin_addr));

下面是编译的时候编译错误：错误都是由于A2W宏引起的，郁闷中
c:\documents and settings\administrator\my documents\visual studio 2005\projects\chat\chat\chatdlg.cpp(113) : error C2065: '_lpa' : undeclared identifier
c:\documents and settings\administrator\my documents\visual studio 2005\projects\chat\chat\chatdlg.cpp(113) : error C2065: '_convert' : undeclared identifier
c:\documents and settings\administrator\my documents\visual studio 2005\projects\chat\chat\chatdlg.cpp(113) : error C2065: '_acp' : undeclared identifier

[linzhang16]

你这个宏怎么定义的，没贴出来啊

[jay的Fans]

#include <iostream>

using namespace std;

int main()
{
wchar_t wstr[] = {'中' , '国' , '人' , '0'};
size_t len;
len = wcslen(wstr);

char *pcstr = new char[2 * len + 1];
memset(pcstr , 0 , 2 * len + 1);
size_t j = 0;
for(size_t i = 0 ; i != len ; ++i)
{
pcstr[j] = wstr[i] >> 8;
++j;
pcstr[j] = wstr[i];
++j;
}

cout << pcstr << endl;
delete []pcstr;

system("pause");
return 0;
}

[jia_xiaoxin]

char* ConvertLPWSTRToLPSTR (LPWSTR lpwszStrIn)
{
LPSTR pszOut = NULL;
if (lpwszStrIn != NULL)
{
int nInputStrLen = wcslen (lpwszStrIn);

// Double NULL Termination
int nOutputStrLen = WideCharToMultiByte (CP_ACP, 0, lpwszStrIn, nInputStrLen, NULL, 0, 0, 0) + 2;
pszOut = new char [nOutputStrLen];

if (pszOut)
{
memset (pszOut, 0x00, nOutputStrLen);
WideCharToMultiByte(CP_ACP, 0, lpwszStrIn, nInputStrLen, pszOut, nOutputStrLen, 0, 0);
}
}
return pszOut;
}

[Splendour]

使用该API之前添加
USES_CONVERSION;

LPWSTR x= A2W(lpsz)

[Splendour]

A2W是ATL的宏，需要定义USES_CONVERSION

[vrace]

char ansiText[] = "Hello";
wchar_t unicodeText[6] = {0};

mbstowcs(unicodeText, ansiText, strlen(ansiText));