c++ 編碼轉化

//UTF-8到GB2312的轉換char* U2G(const char* utf8){int len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);wchar_t* wstr = new wchar_t[len+1];memset(wstr, 0, len+1);MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wstr, len);len = WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);char* str = new char[len+1];memset(str, 0, len+1);WideCharToMultiByte(CP_ACP, 0, wstr, -1, str, len, NULL, NULL);if(wstr) delete[] wstr;return str;}//GB2312到UTF-8的轉換char* G2U(const char* gb2312){int len = MultiByteToWideChar(CP_ACP, 0, gb2312, -1, NULL, 0);wchar_t* wstr = new wchar_t[len+1];memset(wstr, 0, len+1);MultiByteToWideChar(CP_ACP, 0, gb2312, -1, wstr, len);len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);char* str = new char[len+1];memset(str, 0, len+1);WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, len, NULL, NULL);if(wstr) delete[] wstr;return str;}無論是GB2312到UTF-8的轉換，還是UTF-8到GB2312的轉換，都需要注意的是在使用字串後，需要刪除字串指標；這是因為以上兩個方法返回的是字串指標，如果沒有刪除將會記憶體流失，可別說我沒提醒你哦