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    JUST DO IT ~

    我只想當(dāng)個(gè)程序員

    我的評(píng)論

    re: c++ 一些經(jīng)典論文 小高 2014-08-26 13:41  
    Citations
    359 The design and implementation of hierarchical software systems with reusable components - Batory, O?Malley - 1992
    130 The Programmer’s Apprentice - Rich, Waters - 1990
    93 Genesis: An Extensible Database Management System - Batory, Barnett, et al. - 1988
    75 Reusing and Interconnecting Software Components - GOGUEN - 1986
    56 Data Abstraction and Object-Oriented Programming in C - Gorlen, Orlow, et al. - 1990
    48 Software Components with - Booch - 1987
    30 Index Support for Rule Activation - Brant, Miranker - 1993
    20 Software components in a data structure precompiler - Sirkin, Batory, et al. - 1993
    19 P++: a language for largescale reusable software components - Singhal, Batory - 1993
    17 libg++, the GNU C++ library - Lea - 1988
    14 Software templates - Volpano, Kieburtz - 1985
    13 DaTE: The Genesis DBMS software layout editor - Batory, Barnett - 1991
    13 Automating relational operations on data structures - Cohen, Campbell - 1993
    11 Implementing a domain model for data structures - Batory, Singhal, et al. - 1992
    8 Software Reuse through View Type Clusters - Novak - 1992
    4 generation database systems - Next - 1991
    希望能給我發(fā)一份 郵箱地址 gaoyinrui@163.com 謝謝
    能否貢獻(xiàn)一份上傳下載的源碼,最好能直接運(yùn)行的,萬(wàn)分感謝,急需啊。gaoyinrui@163.com
    re: 我的職業(yè)規(guī)劃 小高 2009-10-10 00:55  
    找個(gè)能發(fā)揮自己長(zhǎng)處的方面.. 死鉆研技術(shù)未必適合你

    1.學(xué)院派
    2.實(shí)戰(zhàn)型
    3.混業(yè)務(wù)

    3個(gè)必居其一.否則做到老很虛的.

    還是低調(diào)點(diǎn)...
    做了幾年才感覺(jué)入門(mén)...
    很多人耐不住就走了....


    ---------

    近期目標(biāo):在今年10月底爭(zhēng)取轉(zhuǎn)正。并在一年內(nèi)把技術(shù)提升到更高的層次,達(dá)到高級(jí)程序員水平
    中期目標(biāo):3--5年達(dá)到系統(tǒng)架構(gòu)師水平,能擔(dān)當(dāng)更大的責(zé)任。
    有類(lèi)似 unit 工具來(lái)測(cè)試
    最后哪句話比較中聽(tīng)

    ORACLE sqlplus set 命令速查


    SQL>set colsep' ';     //-域輸出分隔符

    SQL>set echo off;     //顯示start啟動(dòng)的腳本中的每個(gè)sql命令,缺省為on

    SQL> set echo on //設(shè)置運(yùn)行命令是是否顯示語(yǔ)句

    SQL> set feedback on; //設(shè)置顯示“已選擇XX行”

    SQL>set feedback off;  //回顯本次sql命令處理的記錄條數(shù),缺省為on

    SQL>set heading off;   //輸出域標(biāo)題,缺省為on

    SQL>set pagesize 0;   //輸出每頁(yè)行數(shù),缺省為24,為了避免分頁(yè),可設(shè)定為0。

    SQL>set linesize 80;   //輸出一行字符個(gè)數(shù),缺省為80

    SQL>set numwidth 12;  //輸出number類(lèi)型域長(zhǎng)度,缺省為10

    SQL>set termout off;   //顯示腳本中的命令的執(zhí)行結(jié)果,缺省為on

    SQL>set trimout on;   //去除標(biāo)準(zhǔn)輸出每行的拖尾空格,缺省為off

    SQL>set trimspool on;  //去除重定向(spool)輸出每行的拖尾空格,缺省為off

    SQL>set serveroutput on; //設(shè)置允許顯示輸出類(lèi)似dbms_output

    SQL> set timing on; //設(shè)置顯示“已用時(shí)間:XXXX”

    SQL> set autotrace on-; //設(shè)置允許對(duì)執(zhí)行的sql進(jìn)行分析

    set verify off //可以關(guān)閉和打開(kāi)提示確認(rèn)信息old 1和new 1的顯示.

    statement cache 關(guān)注一下
    不錯(cuò)的!
    以用前面 那個(gè)兄弟的話 :"希望這篇文章能夠幫助他們?cè)陂_(kāi)發(fā)期就能避免這樣的失誤,以免后期上線時(shí)再來(lái)修改代碼從而增加項(xiàng)目的成本與風(fēng)險(xiǎn)。"

    說(shuō)的很好.
    關(guān)注一下
    re: 代碼不是調(diào)出來(lái)的 小高 2008-08-13 23:38  
    高手 少...但是 確實(shí)有這樣的人 這也許才是真的程序員 ............你想成為這樣 你可以自己少用調(diào)試器....大腦分析
    這個(gè)代碼比if 更丑陋 ..... 看了本書(shū) 就強(qiáng)用書(shū)上的東西 .... 很有問(wèn)題 .......
    博主有團(tuán)隊(duì)工作的經(jīng)歷嗎 ...每個(gè)人都這樣寫(xiě)(小提大作)...... 項(xiàng)目就真亂了....
    自己研究還差不多 ... 我打賭 你要是真的 遇到了 你還是用 if
    java equals ( Integer ) -125~126 緩存變量可能不通
    re: sqlplus 初始化 login.sql 小高 2008-08-05 05:30  
    set term off
    set linesize 10001
    spool a.txt
    select * from dl_hqk_his where date_ > to_date('20070101','yyyymmdd');
    spool off
    set term on
    re: sqlplus 初始化 login.sql 小高 2008-08-04 21:34  
    現(xiàn)實(shí)所有define 的定義

    idmp@idmp-192.168.2.100> define



    DEFINE _DATE = "04-8月 -08" (CHAR)
    DEFINE _CONNECT_IDENTIFIER = "idmp" (CHAR)
    DEFINE _USER = "IDMP" (CHAR)
    DEFINE _PRIVILEGE = "" (CHAR)
    DEFINE _SQLPLUS_RELEASE = "1002000100" (CHAR)
    DEFINE _EDITOR = "Notepad" (CHAR)
    DEFINE _O_VERSION = "Oracle Database 10g Enterprise Edition Release 10.2.0.
    1.0 - Production
    With the Partitioning, OLAP and Data Mining options" (CHAR)
    DEFINE _O_RELEASE = "1002000100" (CHAR)
    DEFINE SQL_PROMPT = "idmp@idmp-192.168.2.100" (CHAR)
    DEFINE ANBC = "1" (CHAR)
    idmp@idmp-192.168.2.100>
    re: sqlplus 初始化 login.sql 小高 2008-08-03 23:15  
    select
    q'{
    @bar;
    }'
    from dual;



    select
    '
    @foo.htm;
    '
    from dual;




    create or replace package foo
    as
    @foo_declarations;
    @foo_procedures;
    @foo_functions;
    end;



    http://awads.net/wp/2007/03/25/3-useful-sqlplus-tips/
    re: sqlplus 初始化 login.sql 小高 2008-08-03 22:53  
    已用時(shí)間: 00: 00: 01.04
    idmp@idmp-192.168.2.101> set markup html on entmap ON spool on
    preformat off
    idmp@idmp-192.168.2.101&gt; spool tables.xls
    <br>
    idmp@idmp-192.168.2.101&gt; select * from dual;
    <br>
    <p>
    <table border='1' width='90%' align='center' summary='Script output'>
    <tr>
    <th scope="col">
    D
    </th>
    </tr>
    <tr>
    <td>
    X
    </td>
    </tr>
    </table>
    <p>

    已用時(shí)間: 00: 00: 00.04
    idmp@idmp-192.168.2.101&gt; spool off
    re: sqlplus 初始化 login.sql 小高 2008-08-03 22:16  
    用spool 輸出文件 .............html 查詢(xún)的結(jié)果
    re: sqlplus 初始化 login.sql 小高 2008-08-03 22:15  
    [Oracle] 用 Oracle 的 SQL*Plus 工具創(chuàng)建 HTML 頁(yè)面
    作者:Fenng
    日期:23-Dec-2003 
    出處:http://www.dbanotes.net
    版本:1.01

    Oracle 的 SQL*Plus 工具有一些比較有趣的選項(xiàng),合理的使用,能夠給我們意想不到的后果。其中有一個(gè) ”-M” 選
    項(xiàng)能夠創(chuàng)建用來(lái)創(chuàng)建 HTML 報(bào)表,在實(shí)際應(yīng)用中很有用處。我們先來(lái)看看 SQL*Plus的一些選項(xiàng):

    -----------------------Oracle8i------Begin------------------------------------------------
    C:\>SQLPLUS -

    用法 : SQLPLUS [ [<option>] [<logon>] [<start>] ]
    其中 <option> ::= - | -? | [ [-M <o>] [-R <n>] [-S] ]
    < 登錄 > ::= < 用戶(hù)名 >[/< 口令 >][@<connect_string>] | / | /NOLOG
    < 啟動(dòng) > : : = @< 文件名 >[.<ext>] [< 參數(shù) > ...]
    "-" 顯示使用語(yǔ)法
    "-?" 顯示 SQL*Plus 版本標(biāo)幟
    "-M <o>" 使用 HTML 標(biāo)志選項(xiàng) <o>
    "-R <n>" uses restricted mode <n>
    "-S" uses silent mode

    ”-M” 選項(xiàng)指定在輸出的時(shí)侯使用 HTML 標(biāo)記來(lái)輸出數(shù)據(jù),用以代替普通的文本。
    -----------------------Oracle8i-------------End-------------------------------------------

    -----------------------Oracle9i------Begin------------------------------------------------
    D:\>sqlplus -

    SQL*Plus: Release 9.2.0.4.0 - Production

    用法: SQLPLUS [ [<option>] [<logon>] [<start>] ]
    其中 <option> ::= -H | -V | [ [-L] [-M <o>] [-R <n>] [-S] ]
    <logon> ::= <username>[/<password>][@<connect_string>] | / | /NOLOG
    <start> ::= @<URI>|<filename>[.<ext>] [<parameter> ...]
    "-H" 顯示 SQL*Plus 的版本標(biāo)幟和使用語(yǔ)法
    "-V" 顯示 SQL*Plus 的版本標(biāo)幟
    "-L" 只嘗試登錄一次
    "-M <o>" 使用 HTML 標(biāo)志選項(xiàng) <o>
    "-R <n>" uses restricted mode <n>
    "-S" uses silent mode
    -----------------------Oracle9i-------------End-------------------------------------------

    -----------------------Oracle10G Beta------Begin---------------------------------------

    D:\>sqlplus -

    SQL*Plus: Release 10.1.0.0.0 - Beta

    用法: SQLPLUS [ [<option>] [<logon>] [<start>] ]
    其中 <option> ::= -H | -V | [ [-L] [-M <o>] [-R <n>] [-S] ]
    <logon> ::= <username>[/<password>][@<connect_string>] | / | /NOLOG
    <start> ::= @<URI>|<filename>[.<ext>] [<parameter> ...]
    "-H" 顯示 SQL*Plus 的版本標(biāo)幟和使用語(yǔ)法
    "-V" 顯示 SQL*Plus 的版本標(biāo)幟
    "-C" 兼容性版本 <v>
    "-L" 只嘗試登錄一次
    "-M <o>" 使用 HTML 標(biāo)志選項(xiàng) <o>
    "-R <n>" uses restricted mode <n>
    "-S" uses silent mode
    -----------------------Oracle10G Beta---END---------------------------------------------

    (我們從中也可以看出SQLPlus命令的一些變化,如新的參數(shù)等)

    其中 ”-M” 選項(xiàng)的語(yǔ)法如下:

    [-M[ARKUP] "HTML [ON|OFF] [HEAD text] [BODY text]

    [ENTMAP {ON|OFF}] [SPOOL {ON|OFF}] [PRE[FORMAT] {ON|OFF}]"

    如果我們?cè)趯?shí)際應(yīng)用中,要對(duì)公司的某個(gè)Table進(jìn)行每個(gè)月的報(bào)表 HTML 化,用 SQL*Plus 的這個(gè)特性很容易做到。

    舉例如下:

    我們準(zhǔn)備對(duì) Scott 模式下的 DEPT 表進(jìn)行處理。 DEPT 表內(nèi)容:

    SQL> SELECT * FROM dept;

    DEPTNO DNAME LOC
    ---------- ---------------------------- ------------
    10 ACCOUNTING NEW YORK
    20 RESEARCH DALLAS
    30 SALES CHICAGO
    40 OPERATIONS BOSTON

    在系統(tǒng)命令行下輸出 HTML 文件:

    將下面幾行語(yǔ)句存到一個(gè) .sql 腳本中(比如說(shuō) q.sql ) :

    SET ECHO OFF
    SET FEEDBACK OFF
    SELECT * FROM dept;
    SET ECHO ON
    SET FEEDBACK ON
    exit

    然后在命令行下調(diào)用如下命令:

    C:\> sqlplus -s -m "HTML ON HEAD DEPT 表格之內(nèi)容 " Scott/tiger @c:\q.sql>Dept.html

    對(duì)這條命令簡(jiǎn)單的解釋一下:其中 ”-s” 表示 silent 模式, ”-m” 表示啟用 HTML Markup 選項(xiàng),
    ”HEAD DEPT 表格之內(nèi)容 ” 可以用來(lái)定制一個(gè)簡(jiǎn)單的標(biāo)題。然后命令中跟的是數(shù)據(jù)庫(kù)用戶(hù)名字和密碼,
    執(zhí)行腳本,重定向到 Dept.html 中。

    輸出 Dept.html 有如下內(nèi)容(空白處已經(jīng)截去):

    DEPT表格之內(nèi)容
    DEPTNO DNAME LOC
    10 ACCOUNTING NEW YORK
    20 RESEARCH DALLAS
    30 SALES CHICAGO
    40 OPERATIONS BOSTON

    在 SQL*Plus 下輸出文件

    在 SQL*Plus 中可以用 SET MARKUP 命令來(lái)做到。

    SET MARKUP

    用法 : SET MARKUP HTML [ON|OFF] [HEAD text] [BODY text]

    [ENTMAP {ON|OFF}] [SPOOL {ON|OFF}] [PRE[FORMAT] {ON|OFF}]

    把下面的內(nèi)容存為一個(gè) .sql 腳本 ( 比如說(shuō) C:\q.sql) :

    SET ECHO OFF
    SET FEEDBACK OFF
    SET MARKUP HTML ON SPOOL ON
    SPOOL c:\Dept.html
    SELECT * FROM dept;
    SPOOL OFF
    SET MARKUP HTML OFF
    SET ECHO ON
    SET FEEDBACK ON

    在 SQL*Plus 中調(diào)用,即可創(chuàng)建內(nèi)容。在 C:中創(chuàng)建了名為 Dept.html 的 HTML 頁(yè)面,如下所示:
    DEPTNO DNAME LOC
    10 ACCOUNTING NEW YORK
    20 RESEARCH DALLAS
    30 SALES CHICAGO
    40 OPERATIONS BOSTON

    注:由于格式化的問(wèn)題,實(shí)際的顯示效果可能有所不同.
    關(guān)于sys_context()函數(shù)功能一覽

    包括取本地ip,服務(wù)器端domian/db_name……,還有當(dāng)前session的信息
    后面有使用舉例:
    AUTHENTICATION_DATA
    Data being used to authenticate the login user. For X.503 certificate authenticated sessions, this field returns the context of the certificate in HEX2 format.
    256


    Note: You can change the return value of the AUTHENTICATION_DATA attribute using the length parameter of the syntax. Values of up to 4000 are accepted. This is the only attribute of USERENV for which Oracle implements such a change.


    AUTHENTICATION_TYPE
    How the user was authenticated:

    DATABASE: username/password authentication

    OS: operating system external user authentication

    NETWORK: network protocol or ANO authentication

    PROXY: OCI proxy connection authentication

    30

    BG_JOB_ID
    Job ID of the current session if it was established by an Oracle background process. Null if the session was not established by a background process.
    30

    CLIENT_INFO
    Returns up to 64 bytes of user session information that can be stored by an application using the DBMS_APPLICATION_INFO package.
    64

    CURRENT_SCHEMA
    Name of the default schema being used in the current schema. This value can be changed during the session with an ALTER SESSION SET CURRENT_SCHEMA statement.
    30

    CURRENT_SCHEMAID
    Identifier of the default schema being used in the current session.
    30

    CURRENT_USER
    The name of the user whose privilege the current session is under.
    30

    CURRENT_USERID
    User ID of the user whose privilege the current session is under
    30

    DB_DOMAIN
    Domain of the database as specified in the DB_DOMAIN initialization parameter.
    256

    DB_NAME
    Name of the database as specified in the DB_NAME initialization parameter
    30

    ENTRYID
    The available auditing entry identifier. You cannot use this option in distributed SQL statements. To use this keyword in USERENV, the initialization parameter AUDIT_TRAIL must be set to true.
    30

    EXTERNAL_NAME
    External name of the database user. For SSL authenticated sessions using v.503 certificates, this field returns the distinguished name (DN) stored in the user certificate.
    256

    FG_JOB_ID
    Job ID of the current session if it was established by a client foreground process. Null if the session was not established by a foreground process.
    30

    HOST
    Name of the host machine from which the client has connected.
    54

    INSTANCE
    The instance identification number of the current instance.
    30

    IP_ADDRESS
    IP address of the machine from which the client is connected.
    30

    ISDBA
    TRUE if you currently have the DBA role enabled and FALSE if you do not.
    30

    LANG
    The ISO abbreviation for the language name, a shorter form than the existing 'LANGUAGE' parameter.
    62

    LANGUAGE
    The language and territory currently used by your session, along with the database character set, in this form:

    language_territory.characterset
    52

    NETWORK_PROTOCOL
    Network protocol being used for communication, as specified in the 'PROTOCOL=protocol' portion of the connect string.
    256

    NLS_CALENDAR
    The current calendar of the current session.
    62

    NLS_CURRENCY
    The currency of the current session.
    62

    NLS_DATE_FORMAT
    The date format for the session.
    62

    NLS_DATE_LANGUAGE
    The language used for expressing dates.
    62

    NLS_SORT
    BINARY or the linguistic sort basis.
    62

    NLS_TERRITORY
    The territory of the current session.
    62

    OS_USER
    Operating system username of the client process that initiated the database session
    30

    PROXY_USER
    Name of the database user who opened the current session on behalf of SESSION_USER.
    30

    PROXY_USERID
    Identifier of the database user who opened the current session on behalf of SESSION_USER.
    30

    SESSION_USER
    Database user name by which the current user is authenticated. This value remains the same throughout the duration of the session.
    30

    SESSION_USERID
    Identifier of the database user name by which the current user is authenticated.
    30

    SESSIONID
    The auditing session identifier. You cannot use this option in distributed SQL statements.
    30

    TERMINAL
    The operating system identifier for the client of the current session. In distributed SQL statements, this option returns the identifier for your local session. In a distributed environment, this is supported only for remote SELECT statements, not for remote INSERT, UPDATE, or DELETE operations. (The return length of this parameter may vary by operating system.)




    SQL> SELECT sys_context('USERENV','IP_ADDRESS') FROM DUAL;

    SYS_CONTEXT('USERENV','IP_ADDR
    --------------------------------------------------------------------------------
    10.0.0.177

    SQL> SELECT SYS_CONTEXT ('hr_apps', 'group_no') "User Group"
    2 FROM DUAL;

    User Group
    --------------------------------------------------------------------------------

    SQL> SELECT sys_context('USERENV','CLIENT_INFO') FROM DUAL;

    SYS_CONTEXT('USERENV','CLIENT_
    --------------------------------------------------------------------------------

    SQL> SELECT sys_context('USERENV','CURRENT_SCHEMA') FROM DUAL;

    SYS_CONTEXT('USERENV','CURRENT
    --------------------------------------------------------------------------------
    IDCBJ

    SQL> SELECT sys_context('USERENV','HOST') FROM DUAL;

    SYS_CONTEXT('USERENV','HOST')
    --------------------------------------------------------------------------------
    WORKGROUP\RAINY

    SQL> SELECT sys_context('USERENV','AUTHENTICATION_DATA') FROM DUAL;

    SYS_CONTEXT('USERENV','AUTHENT
    --------------------------------------------------------------------------------

    SQL> SELECT sys_context('USERENV','AUTHENTICATION_TYPE') FROM DUAL;

    SYS_CONTEXT('USERENV','AUTHENT
    --------------------------------------------------------------------------------
    DATABASE

    SQL> SELECT sys_context('USERENV','DB_DOMAIN') FROM DUAL;

    SYS_CONTEXT('USERENV','DB_DOMA
    --------------------------------------------------------------------------------
    chenyq

    SQL> SELECT sys_context('USERENV','DB_NAME') FROM DUAL;

    SYS_CONTEXT('USERENV','DB_NAME
    --------------------------------------------------------------------------------
    ora817

    SQL> SELECT SYS_CONTEXT('hr_context', 'org_id') FROM DUAL;

    SYS_CONTEXT('HR_CONTEXT','ORG_
    --------------------------------------------------------------------------------

    SQL>
    select to_date('2008-6-1','yyyy-mm-dd') - interval '7' year test from dual;
    http://download.oracle.com/otn/nt/oracle10g/10201/10201_gateways_win32.zip


    注意oracle 10g 不附帶同名透明網(wǎng)管 . 無(wú)法連接 mssql 庫(kù) .
    re: oracle open_cursors 小高 2008-06-16 15:19  
    共享SQL區(qū)在shared pool中釋放的條件

    alter system flush shared_pool


    http://space.itpub.net/12361284/viewspace-259954
    re: excel 模板[未登錄](méi) 小高 2008-06-12 16:34  
    文件不能下載,麻煩您給我一份,急用,謝謝
    email:tryonmind@163.com
    re: ibm thinkpad 鍵盤(pán) 設(shè)置 小高 2008-05-10 10:29  
    @呵呵
    就是 新的要表達(dá)意思的鍵盤(pán)碼
    再千萬(wàn)的記錄 是否比較明顯.
    @xx


    可能是安裝的時(shí)候沒(méi)有建立 oracle 數(shù)據(jù)庫(kù)。用工具建立一下就ok
    1、使用sys用戶(hù)登陸

    2、執(zhí)行 $ORACLE_HOME/rdbms/admin/utlxplan.sql ,生成表。

    3、執(zhí)行 $ORACLE_HOME/sqlplus/admin/plustrce.sql 生成角色等。

    4、對(duì)需要使用該功能的用戶(hù)賦予角色。

    grant plustrace to public;


    序號(hào)

    命令

    解釋


    1

    SET AUTOTRACE OFF

    此為默認(rèn)值,即關(guān)閉Autotrace


    2

    SET AUTOTRACE ON

    產(chǎn)生結(jié)果集和解釋計(jì)劃并列出統(tǒng)計(jì)


    3

    SET AUTOTRACE ON EXPLAIN

    顯示結(jié)果集和解釋計(jì)劃不顯示統(tǒng)計(jì)


    4

    SETAUTOTRACE TRACEONLY

    顯示解釋計(jì)劃和統(tǒng)計(jì),盡管執(zhí)行該語(yǔ)句但您將看不到結(jié)果集


    5

    SET AUTOTRACE


    TRACEONLY STATISTICS

    只顯示統(tǒng)計(jì)




    Eg:SET AUTOTRACE ON, set timing on, alter session set time_statistics=true;


    三、Autotrace執(zhí)行計(jì)劃的各列的涵義

    序號(hào)

    列名

    解釋


    1

    ID_PLUS_EXP

    每一步驟的行號(hào)


    2

    PARENT_ID_PLUS_EXP

    每一步的Parent的級(jí)別號(hào)


    3

    PLAN_PLUS_EXP

    實(shí)際的每步


    4

    OBJECT_NODE_PLUS_EXP

    Dblink或并行查詢(xún)時(shí)才會(huì)用到




    四、AUTOTRACE Statistics常用列解釋

    序號(hào)

    列名

    解釋


    1

    db block gets

    從buffer cache中讀取的block的數(shù)量


    2

    consistent gets

    從buffer cache中讀取的undo數(shù)據(jù)的block的數(shù)量


    3

    physical reads

    從磁盤(pán)讀取的block的數(shù)量


    4

    redo size

    DML生成的redo的大小


    5

    sorts (memory)

    在內(nèi)存執(zhí)行的排序量


    7

    sorts (disk)

    在磁盤(pán)上執(zhí)行的排序量






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