C++ GB2312 和 utf8 在win32下 互转

 string ANSItoUTF8(const char* strAnsi)
 {
     //获取转换为宽字节后需要的缓冲区大小，创建宽字节缓冲区，936为简体中文GB2312代码页
     int nLen = MultiByteToWideChar(CP_ACP, NULL, strAnsi, -, NULL, NULL);
     WCHAR *wszBuffer = new WCHAR[nLen + ];
     nLen = MultiByteToWideChar(CP_ACP, NULL, strAnsi, -, wszBuffer, nLen);
     wszBuffer[nLen] = ;
     //获取转为UTF8多字节后需要的缓冲区大小，创建多字节缓冲区
     nLen = WideCharToMultiByte(CP_UTF8, NULL, wszBuffer, -, NULL, NULL, NULL, NULL);
     CHAR *szBuffer = new CHAR[nLen + ];
     nLen = WideCharToMultiByte(CP_UTF8, NULL, wszBuffer, -, szBuffer, nLen, NULL, NULL);
     szBuffer[nLen] = ;

     string s1 = szBuffer;
     //内存清理
     delete[]wszBuffer;
     delete[]szBuffer;
     return s1;
 }

 string UTF8toANSI(const char* strUTF8)
 {
     //获取转换为多字节后需要的缓冲区大小，创建多字节缓冲区
     int nLen = MultiByteToWideChar(CP_UTF8, NULL, strUTF8, -, NULL, NULL);
     WCHAR *wszBuffer = new WCHAR[nLen + ];
     nLen = MultiByteToWideChar(CP_UTF8, NULL, strUTF8, -, wszBuffer, nLen);
     wszBuffer[nLen] = ;

     nLen = WideCharToMultiByte(, NULL, wszBuffer, -, NULL, NULL, NULL, NULL);
     CHAR *szBuffer = new CHAR[nLen + ];
     nLen = WideCharToMultiByte(, NULL, wszBuffer, -, szBuffer, nLen, NULL, NULL);
     szBuffer[nLen] = ;

     string s1 = szBuffer;
     //清理内存
     delete[]szBuffer;
     delete[]wszBuffer;
     return s1;
 }

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