The problem of database failure in SQLite Chinese path creation in C + +

Sqlite3 is used in the Utf-8 code, so when the database is created if the path is plain English letters and numbers, so many ansii and utf-8 encoding is the same, this time the Sqlite3_open function call completely no problem. However, if it is in Chinese, asnsii directly into the Utf-8 will be wrong, the path cannot be found, thus creating or opening the database failed. The workaround is as follows:

// The sdk can be directly converted from UNICODE to utf-8, not directly from ansii to utf-8
// So Ansii is converted to Utf-8, it needs to be converted to UNICODE first and then to utf-8
void UnicodeToUtf8 (char ** dest, const WCHAR * src)
 {
// ASSERT (dest! = NULL || src! = NULL);
     int len = -1;
     len = WideCharToMultiByte (CP_UTF8, 0, src, -1, 0, 0, 0, 0) +1;
     * dest = new char [len + 1];
     :: WideCharToMultiByte (CP_UTF8, 0, src, -1, * dest, len, 0, 0);
 }

 void AnsiToUtf8 (char ** dest, const char * src)
 {
    // ASSERT (dest! = NULL || src! = NULL);
     WCHAR * pwszStr = NULL;
     C2W (& pwszStr, src);
     UnicodeToUtf8 (dest, pwszStr);
     SAFE_ARRYDELETE (pwszStr);
 }

// Create \ Open database
       // szCreateTable = "c: \\ program files \\ yoyo \\ test.db"
        char * pszCreateSql = NULL;
     // Failed to create or open without this sentence
    AnsiToUtf8 (& pszCreateSql, szCreateTable);

    ///////////

    if (sqlite3_open (/ * szCreateTable * / pszCreateSql, ppdb)! = SQLITE_OK)
    {
        // Failed to open or create database
        sqlite3_close (* ppdb);
        * ppdb = null;
        return DB_FAILED;
    }
    else {}