ofstream error in c++

Question

You can try this:

#include <fstream>

int main () {
  std::ofstream myfile;

  myfile.open ("example.txt");
  myfile << "Writing this to a file.\n";
  myfile.close();

  return 0;
}

The file streams are actually defined in <fstream>.

You may not be including the appropiate header file.

adding #include <fstream> at the beggining of your source file should fix the error.

I think it is a simple spelling mistake offstream instead of ofstream.

Probably, you are including the wrong header file. There is a header <iosfwd> that is used for header files that need to reference types from the STL without needing a full declaration of the type. You still are required to include the proper header <iostream> in order to use the types in question.