c - Pointer Dereferencing = Program Crash -

- 

  अहस्ताक्षरित int * pmessageLength, MessageLength; Char * pszParsePos; ... // डेटा में pszParsePos ... printf ("\ n संदेश की लंबाई \ nb1:% d \ nb2:% d \ nb3:% d \ nb4:% d \ n", pszParsePos [1], pszParsePos [2] , pszParsePos [3], pszParsePos [4]); PmessageLength = (अहस्ताक्षरित int *) और pszParsePos [1]; MessageLength = * ((अहस्ताक्षरित int *) और pszParsePos [1]); // प्रोग्राम समाप्त होता है

आउटपुट: 

 संदेश की लंबाई बी 1: 0 बी 2: 0 बी 3: 0 बी 4: 1  
 टी क्यों यह मेरे कार्यक्रम दुर्घटनाग्रस्त है समझ में नहीं आता क्या कोई इसे समझा सकता है, या कम से कम एक वैकल्पिक पद्धति का सुझाव दे सकता है जो क्रैश नहीं करेगा? 
 
 आपके समय के लिए धन्यवाद!

बस त्रुटि का अर्थ है कि आप गलत संरेखण के साथ डेटा तक पहुंचने का प्रयास कर रहे हैं। विशेष रूप से, ऐसा प्रतीत होता है कि प्रोसेसर को int को कहीं और की तुलना में अधिक सख्ती से संरेखित करने की आवश्यकता होती है, और अगर आपका * pszParsePos गठबंधन किया जाता है, तो एक int सीमा (जो कि आप इसे कैसे प्रारंभ करते हैं, पर ऐसा होता है, उदाहरण के लिए, यदि आप malloc का उपयोग करते हैं, तो यह निश्चित है कि & pszParsePos [1] नहीं है

इसे ठीक करने का एक तरीका स्पष्ट रूप से MessageLength का निर्माण होगा, अर्थात, 

  MessageLength = (pszParsePos [1] & lt; & lt; 24) | (PszParsePos [2] & lt; & lt; 16) | (PszParsePos [3] & lt; & lt; 8) | PszParsePos [4]

(या अन्य तरीकों के आसपास अगर यह थोड़ा-अंत तक होना चाहिए)। यदि आप वास्तव में टाइप करना चाहते हैं, तो सुनिश्चित करें कि आप तक पहुंचने वाले सूचक ठीक तरह से गठबंधन कर रहे हैं।


Comments

Post a Comment

Popular posts from this blog

asp.net - Javascript/DOM Why is does my form not support submit()? -

-
This is my first time working with asp.net and javascript, so I do not know very good web resources, or Much about javascript debugging I have to find out that on line oFormObject.submit (); Microsoft JScript Runtime Error: Object does not support this property or method I am using the link to work as a button because I am terrible in aesthetics and I think That link will look more professional than a table of 50 buttons. I have read that this solution can cause problems with browsers due to pre-rendering of my links and many additional traffic and problems, but CSS gives me a button like a link, which has issues of alignment and difference seemed to. & lt ;! DOCTYPE HTML PUBLIC "- // W3C // DTD HTML 4.01 // N" "http://www.w3.org/TR/html4/strict.dtd"> & Lt; Html xmlns = "http://www.w3.org/1999/xhtml" & gt; & Lt; Head & gt; & Lt; Link rel = "stylesheet" type = "text / css" href = "defect differen
Read more

sockets - Delphi: TTcpServer, connection reset when reading -

-
I am trying to implement one for Delphi, but there are some problems with communication. Fitnesse will start my process, and give me a portmember as a command line argument. Then I should make a socket on the port number given to me, and fitness will connect to that port I am using a TCPCP server for the job: < Pre> TcpServer1.LocalPort: = ParamStr (ParamCount); TcpServer1 Active: = true; On OnEXEPT () -Event, I send the protocol version to use as specified in the protocol. Process TForm1.TcpServer1Accept (From: TOBject; ClientSocket: TCustomIpClient); Var s: ansistring; Start clientSocket. Syndrome ('slim - v 0.0', # 10); SetLength (S, 6); ClientSketts Receavebook (S, 6); End; When I call ReceiveBuf (), the process ends, and fitness throws an exception: java.net.SocketException: connection Reset I have seen what sent and received. It shows that my code sends the protocol version, fitness sends back a message, and when I try to get this message
Read more

javascript - Classic ASP "ExecuteGlobal" statement acting differently on two servers -

-
I have a strange problem that I really do not know. In addition to developing a new ASP.NET site, I have to support the old "classic ASP" site. It is written in VBScript with a batch of JavaScript functions. Many of the JavaScript functions include 'files' Everything is fine on our production system (which security is controlled by another group - this is a military installation) Debugging them once did not work I). However, I have a fix for a vague bug that needs to be fully tested and some functions do not run under the "local" copy of the website that runs on my PC. For the record, I am running IIS 5.1 on XP. The problem is that some Javascript functions are running "OK" on the production server, but when they use it as a server, they are not defined on my PC what is happening that last Programmer, for some reason, has decided to put some functions in a series of files, which according to the observations, imitate the "need_once
Read more