CODEWITHSUNDEEP
c++segmentation-faultofstream
Niv Ben Shabat
Niv Ben Shabat

Reputation: 3

segmentation fault in ofstream close c++

well i'm hardly trying to figure out why a segmentation fault occurs in the following code in one of my classes, the function is called once,

void fileTransfer::createFile(){
   std::ofstream fout;
   fout.open("th.txt", std::ios::binary | std::ios::out);
   char *toSend = new char();
   for (int i=0;i<totalSize_;i++) {
      toSend[i]=totalData_.front();
      totalData_.pop_front();
   }
   std::cout<<"stage 1"<< std::endl;
   fout.write(toSend, totalSize_);
   fout.flush();
   std::cout<<"stage 2"<< std::endl;
   fout.close();
   std::cout<<"stage 3"<< std::endl;
}

and i'm getting:

stage 1
stage 2
Segmentation fault (core dumped)

any ideas why is this happening?

Upvotes: 0

Views: 2541

Answers (1)

user2100815
user2100815

Reputation:

This:

  char *toSend = new char();

creates a pointer that points to a single dynamically allocated character, which you then treat as if it were an array of multiple characters. You could use:

  char *toSend = new char[totalSize];

or similar, but really you want to use a std::vector <char> or a std::string.

Upvotes: 4

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