Not possible combine two or more file opening mode in open () method - File Handling

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• Nihal   -Posted on 06 Oct 15
  You can combine two or more file opening mode in open () method.
  A file must be opened before you can read data from it or write to it. You can use either ofstream or fstream object to open a file for writing and ifstream object for reading.
  Following is the syntax for open() function.
  void open(const char * filename, ios::openmode mode);
  some of the important mode are as follows.
  ios::app     Append mode.
  ios::in     Open a file for reading.
  ios::out     Open a file for writing.
  ios::trunc     If the file already exists, data will be truncated.
  
  You can combine two or more of these values.
  ofstream fileObj;
  fileObj.open("filename.txt", ios::out | ios::trunc );
  

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