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    MYSQL *mysql_init(MYSQL *);
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    ´íÎó£ºNULL
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2. ½¨Á¢ÎïÀíÁ¬½Ó
    MYSQL *mysql_real_connect(MYSQL *connection,
 const char *server_host,
 const char *sql_user_name,
 const char *sql_password,
 const char *db_name,
 unsigned int port_number,
 const char *unix_socket_name,
 unsigned int flags);
    ÆäÖÐconnection²ÎÊýΪͨ¹ýmysql_initº¯Êý´´½¨µÄ¾ä±ú£¬server_host²ÎÊý¿ÉΪÖ÷»úÃû»òIPÖµ£¬Èç¹ûÁ¬µ½±¾»ú£¬ÎÒÃǽö½öÖ»ÐèÖ¸¶¨“localhost”¼´¿É¡£sql_user_nameºÍsql_password¼´Îª·ÃÎÊÊý¾Ý¿âµÄÓû§ÃûºÍÃÜÂ룬Èç¹ûsql_user_nameΪ¿Õ£¬ÄÇôĬÈÏΪµ±Ç°Linux userµÄÓû§Ãû£¬Èç¹ûsql_passwordΪ¿Õ£¬ÄÇôֻÄÜ·ÃÎʲ»ÐèÒªÃÜÂëµÄÊý¾Ý¡£ÃÜÂëÔÚ¾­ÍøÂç´«Êä֮ǰ¶¼¾­¹ý¼ÓÃÜ´¦Àí¡£Í¨³£Çé¿öÏ£¬Èç¹ûÄãûÓиıäMySQLµÄĬÈÏ°²×°£¬port_numberºÍ*unix_socket_nameµÄÖµ·Ö±ðΪ0ºÍNULL¼´¿É£¬ËûÃÇĬÈÏΪµ±Ç°ÏàÓ¦Öµ¡£flags²ÎÊýÔÊÐíÎÒÃǸı䵱ǰʹÓÃЭÒéµÄÌØÐÔ£¬Ä¬ÈÏÇé¿öÏ£¬ÖÃ0¼´¿É¡£
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3. ¶Ï¿ªÁ¬½Ó
    void mysql_close(MYSQL *connection);
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4. Ñ¡ÏîÉèÖÃ
    int mysql_options(MYSQL *connection, enum option_to_set,
 const char *argument);
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   unsigned int timeout = 7;
   connection = mysql_init(NULL);


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