Example

Download This Source for Free Pascal

var
  myFile    : File;
  byteArray : array[1..8] of byte;
  oneByte   : byte;
  i : Integer;
  myWord, myWord1, myWord2 : Word;
  myFileW : File of Word;

begin
  // Try to open the Test.byt file for writing to
  Assign(myFile, 'File.001');
  Rewrite(myFile, 4);   // Define a single 'record' as 4 bytes

  // Fill out the data array
  for i := 1 to 8 do byteArray[i] := i;

  // Write the data array to the file
  BlockWrite(myFile, byteArray, 2);   // Write 2 'records' of 4 bytes

  // Close the file
  Close(myFile);

  // Reopen the file for reading
  Reset(myFile, 1);   // Now we define one record as 1 byte

  // Display the file contents
  while not Eof(myFile) do begin
    BlockRead(myFile, oneByte, 1);   // Read and display one byte at a time
    Writeln(oneByte);
  end;

  // Close the file for the last time
  Close(myFile);

  // Try to open the Test.bin binary file for writing to
  Assign(myFileW, 'File.002');
  Rewrite(myFileW);

  // Write a couple of lines of Word data to the file
  myWord1 := 234;
  myWord2 := 567;
  Write(myFileW, myWord1, myWord2);

  // Close the file
  Close(myFileW);

  // Reopen the file in read only mode
  Reset(myFileW);

  // Display the file contents
  while not Eof(myFileW) do begin
    Read(myFileW, myWord);
    Writeln(myWord);
  end;

  // Close the file for the last time
  Close(myFileW);
end.

Output

1
2
3
4
5
6
7
8
234
567

See Also