Data Types and File Variables

Header file: #include "fstream.h"
The fstream.h header file must be included in the program. Place it near the top of the program source file where your event handlers are located that need to do file processing.

File variable types:

• ifstream - input file stream. Use this to declare an input file variable.
• ofstream - output file stream. Use this to declare a file variable for output of data.
• fstream - generalized file stream. Used to declare a file variable for either input or output. The access mode is specified when the open member function is called.

File Member Functions

• open - A file must be opened before it can be accessed for either reading or writing. The open operating is performed by executing the open member function for the file variable.

  Example:

  #include "fstream.h"
  
  ifstream infile;
  
  {
  
    infile.open("filename.dat");
  
    infile >> 
  }