- File Name : TestParts45.java
- Usage :
    java TestParts45 Generate < [inputfile]
         or 
         echo [n] | java TestParts45 Generate

    java TestParts45 Sieve < [inputfile]
    java TestParts45 Replace [s1] [s2] < [inputfile]
    java TestParts45 Unique < [inputfile]
    java TestParts45 Tail [n] < [inputfile]

    ## Generate ##

    	 [inputfile] for Generate has only one integer in it. For example,
	 if [inpufile] contains 7, the output will be 2 3 4 5 6 7. 
         Alternatively, you can try:

                  echo "7" | java TestParts45 Generate

    ## Sieve ##

         [inputfile] for Sieve should look the same as the output of Generate.
         So if [inputfile] contains 2 3 4 5 6 7, output should be 2 3 5 7.
         Alternatively, you can try:

                  echo "2 3 4 5 6 7" | java TestParts45 Sieve

    ## Replace ##

         [inputfile] for Replace, Unique, Tail is any text file.
         Replace replaces [s1] with [s2] in input.

             java TestParts45 Replace [s1] [s2] < [inputfile] > [outputfile]

         If you really want to test complicated replaces, use your favorite
         text editor to do a global replace of [s1] with [s2] in
         [inputfile], then save the result to a file, say [answerfile].  Then 
               diff [outputfile] [answerfile]
	 should return with no output.

    ## Unique ##

	    Unique removes consecutive duplicate lines.

                   java TestParts45 Unique < [inputfile] > [outputfile]
	    To test, use the Unix uniq command:
		   uniq [inputfile] [outputfile2]
	    Then
		   diff  [outputfile] [outputfile2]
	    should return with no output

    ## Tail ##

         [n] argument to Tail works as the project spec says, and the input
         stream into Tail is a sequence of file names (so [inputfile] in
         the command line below contains file names separated by whitespace).
         To test you can use the Unix tail command.  Note that for the Unix
	 tail command, a + or - must precede [n], and the command takes 1
         file as an argument, and uses the contents of that file.
                     java TestParts45 Tail [n] < [inputfile] > [outputfile]
                     tail [n] [inputfile] > [answerfile]
                     diff [outputfile] [answerfile]