fc

Compares two files or sets of files, displaying the differences between the two.

   fc [d:][path]file1 [d:][path]file2 [options]

Compares file1 to file2.

Options

  /A
  Displays the first and last lines of differences only

  /B
  Compares binary files

  /C
  Ignore case

  /L
  Compare text files

  /LBn
  Set the maximum number of consecutive different ASCII lines to n

  /Mn
  Set the maximum number of differences between binary files
  to report, before aborting.
  The default value is 20.
  Use 0 to allow an unlimited number of differences.

  /N
  Display the line numbers (text files only)

  /S
  Scan files in subdirectories as well

  /T
  Does not convert tabs into spaces for comparison

  /W
  Pack white space (tabs, spaces) for text comparison

  /X
  Do not show context lines in text comparison

  /nnn
  Set to nnn lines the minimum number of consecutive matching
  lines for comparison resynchronization

Notes

FC defaults to binary mode for files .EXE, .COM, .SYS, .OBJ, .BIN and .LIB.
By default the binary compare stops after 20 differences but that value can be modified through the /M switch. /M0 means "unlimited differences". /M is interpreted as /M0.
A design limitation of this program is that, in the text mode file comparison, only the first 32765 lines are compared; the remaining lines are ignored. The line length is virtually unlimited.