Re: NULL

From:

"BobR" <removeBadBobR@worldnet.att.net>

Newsgroups:

comp.lang.c++

Date:

Fri, 22 Jun 2007 02:59:26 GMT

Message-ID:

<iWGei.203435$p47.66651@bgtnsc04-news.ops.worldnet.att.net>

Mohitz <coolmohitz@gmail.com> wrote in message...

Ya, the failure of the condition indicates a parse error. I want to
just print an intelligent
error message when that happens and want the program to exit. What's
the best way to do that?

Also, I am now trying to return a pointer but the program exits with a
segmentation fault. I am sorry
i am not quite good with pointers. Here is the code i am using. Is
something wrong with it?

ClassName* funcName(string name){
      deque<ClassName> tempDeque = someGlobalClassNameDeque;
      deque<ClassName>::iterator tempDequeIterate;
      tempDequeIterate = tempDeque.begin();
      while (tempDequeIterate != tempDeque.end()){
         ClassName * tempClassName = new ClassName();
         ClassName temp = *tempDequeIterate;
         *tempClassName = temp;
         if (name == temp->name)
                 return tempClassName;
         tempDequeIterate++;
      }
      return NULL;
}

int main(){

std::string someString("Testing 1 2 3");
try{

        ClassName *p = funcName(someString);
        if (p == NULL){
            parseError(someString + " undefined.");

             someString += " undefined.";
             throw someString;

        }
        else{
            toRet = anotherFunc(*p);
        }

      } // try
   catch( std::string const &st ){
       std::cout<< st <<std::endl;
       }
   catch( const std::out_of_range &Oor ){
       std::cout<<"out_of_range caught "<<Oor.what()<<std::endl;
       }
   catch( std::exception const &se){
       std::cout<<se.what()<<std::endl;
       }
   catch( ... ){
       std::cout<<"caught a cold or something!"<<std::endl;
       }

return toRet;
}

Any suggestions/comments would be appreciated.
Thank you, Mohit

Please, do not top-post.

--
Bob R
POVrookie