Zhanhailiang Date: 2014-10-25Use GCC to compile such as the following code times "undefined reference to ' sin '":#include #include #include Main() { DoubleA= Sin(1); Exit (0);}[Root@~/Wade/Codereview/Learningc/9]# gcc-o Timetest timetest.c/Tmp/Ccizihf7.o:infunction `Func': timetest.c: (. text+0x3f): Undefined reference to ' sin 'Collect2:LDReturned1 ExitStatusUsually due to the lack of a mathematical library, only need to manually add the GCC libm.so Library at compile time. For example,
For Baidu39;s ability to capture plain text, Baidu webmaster club lee replied in March:1. Text link url. Baidu will find that it is a url address and use this address to crawl it to the corresponding url address.2. Whether or not we should pass weight on the link. The only criterion is: whether the link is a user or the other website that really recommends your website or this recommendation, and whether it is valuable to users.However, because user
number of records 32 var perpagecount = 20; // The number of pre-viewed records per page 33 var pagecount = 0; // the total number of pages 34 var actualperpagecount = 0; // The actual number of displays per page 35 var strtotal = ""; // buffer variable 36 37 var temprs = totalcount % perpagecount; // calculate the total number of pages 38 If (temprs! = 0) {39 pagecount = parseint (totalcount/perpagecount) + 1; 40} 41 else {42 pagecount = parseint (t
. Data. ConnectionState. Closed)Row 37: con. Open ();Row 38:Row 39 :}
Source File: c: \ Inetpub \ wwwroot \ HomeMS \ App_Code \ DataBase. cs line: 37
Stack trace:[SqlException (0x80131904): A connection has been established with the server, but an error occurs during logon. (Provider: Shared Memory provider, error: 0-there is no process on the other end of the MPs queue.)]System. Data. SqlClient. SqlInternalConnection. OnError (SqlException exception,
.. sysprocesses where dbid = db_id (@ dbname)
20
Open # TB
21
Fetch next from # TB into @ spid
22
While @ fetch_status = 0
23
Begin
24
Exec ('Kill '+ @ spid)
25
Fetch next from # TB into @ spid
26
End close # TB deallocate # TB
"
;
27
Strsqls. Add (sqlstr );
28
//
Execute SQL statements
29
Try
30
{
31
Result
=
Dbhelpersql. executesqltran (strsqls );//
This function is used to execute multiple SQL statements to implement
Super User find: '/home/pipi/. gvfs #39;: insufficient Permissions
Http://blog.csdn.net/pipisorry/article/details/39536433
The root user who switched to the sudo su command reports an error when looking for a file
Root @ ubuntu:/home/pipi # find/-perm-2000/sbin/unix_chkpwdfind: '/home/pipi/. gvfs': insufficient PermissionsIt is a directory named. gvfs in the main directory of pipi,
Dr-x ------ 2 pipi 0 May 6 10:06. gvfs
D ????????? ? ? ? ? ? . G
Caused By:java.lang.UnsatisfiedLinkError:/tmp/ snappy-1.0.5.3-45421025-17a6-448f-a9dc-55dbe488cc2a-libsnappyjava.so:/usr/lib64/libstdc++.so.6:version ' GLIBCXX _3.4.9 ' not found (required by/tmp/snappy-1.0.5.3-45421025-17a6-448f-a9dc-55dbe488cc2a-libsnappyjava.so)
At Java.lang.classloader$nativelibrary.load (Native method)
At Java.lang.ClassLoader.loadLibrary0 (classloader.java:1807)
At Java.lang.ClassLoader.loadLibrary (classloader.java:1703)
At Java.lang.Runtime.load0 (runtime.java:770)
At Ja
Tags: jdbc Connection pool JavaPlatform application developers reported a issue to our platform that they encountered a strange problem when testing their application, and the system reported undefinedexception (developer-defined exception, capturing the JPA Exception an undefined exception when found unable to handle it, they posted the exception stack information reported in the WebLogic:and they also posted the MySQL error.log.140917 8:35:37 [Warning] aborted connection 35011 to DB: "User: '
caused by:com.fasterxml.jackson.core.JsonParseException:Unrecognized token ' name ': Was expecting (' true ', ' false ' or ' n ') Ull ')Ajax cross-domain issuesAjax commits add the following two lines of codeContentType: '
In Python, the processing of Chinese characters has always been a headache, a word is garbled, and the cause of garbled is not the same, sometimes Python itself default encoder settings are not correct, and sometimes the use of the IDE decoder is
The following error occurs when compiling a file with GCC today: Expected '=', ';', 'asm 'or' _ attribute _ 'before'
The statement is almost commented out, and compilation is still not passed. Check include to find that the include has missed the
segment. It returns an integer indicating the timer number, which can be used to cancel the timer later.Var timerId = setTimeout (func | code, delay)In the code above, the setTimeout function accepts two parameters. The first parameter func | code is the name of the function to be postponed or a piece of code, and the second parameter delay is the number of milliseconds to postpone execution.Console. log (1 );SetTimeout (39;console. log (2)
1. php The code is as follows:Copy code Basic information 1: Basic information 2: 2. php The code is as follows:Copy code Product name: Product price: Product Model: 3. php The code is as follows:Copy code Other information 1: Other information 2: 4. php The code is as follows:Copy code $ Base1 = $ _ REQUEST [39;base139;];$ Base2 = $ _ REQUEST [
system to convert hexadecimal to decimal.Method 2 The code is as follows:Copy code Function cloud_tag (){$ Arr_tag = array ();$ I = 0;$ Query = mysql_query ("SELECT 39;tag39; FROM 39;article 39;");While ($ res = mysql_fetch_assoc ($ query )) {$ Tmp = explode (
PHP, last monthStrtotime has a small problem The code is as follows:Copy code > Php-r "echo date (39;ymd000000 prime;, strtotime (39;-1 month39;, strtotime ('2017 prime ;)));"20130701000000 #> Php-r "echo date (39;ymd000000 prime;, strtotime (39
It took about a month to classify Redis code from the very beginning, from the struct structure analysis to the final analysis of the main program, the code of each major module breaks through and learns from each other one by one. In short, it has gained a lot. For a long time, I haven39;t had the patience to thoroughly learn a framework. Learning a framework is only a small part of it, it is really hard to thoroughly understand the principles behi
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