perl countwords.pl "gettysburg.address"

creates the file output.txt, which contains,

1:   Four score and seven years ago our fathers brought 
2: forth on this continent, a new nation, conceived in
3: Liberty, and dedicated to the proposition that all 
4: men are created equal.
5: 
6:   Now we are engaged in a great civil war, testing 
7: whether that nation or any nation so conceived and
8: so dedicated, can long endure.  We are met on a 
9: great battle-field of that war.  We have come to
10: dedicate a portion of that field, as a final resting
11: place for those who here gave their lives that that 
12: nation might live.  It is altogether fitting and proper 
13: that we should do this. 
14:  
15:   But, in a larger sense, we can not dedicate - we 
16: can not consecrate - we can not hallow - this
17: ground. The brave men, living and dead, who
18: struggled here, have consecrated it, far above our 
19: poor power to add or detract.  The world will little 
20: note, nor remember what we say here, but it
21: can never forget what we did here.  It is for us the 
22: living, rather, to be dedicated here to the unfinished
23: work which they fought here have thus far so
24: nobly advanced.  It is rather for us to be here 
25: dedicated to the great task remaining before us - 
26: that from these honored dead we take increased
27: devotion to that cause for which they gave the last
28: full measure of devotion - that we here highly
29: resolve that these dead shall not have died in vain -
30: that this nation, under God, shall have a new birth
31: of freedom - and that government of the people, by
32: the people, for the people, shall not perish from the 
33: earth. 
a  7
above  1
add  1
advanced  1
ago  1
all  1
altogether  1
and  6
any  1
are  3
as  1
battle  1
be  2
before  1
birth  1
brave  1
brought  1
but  2
by  1
can  5
 . . .

we  11
what  2
whether  1
which  2
who  2
will  1
work  1
world  1
years  1

• Instead of counting the number of occurrences by adding one to the indicated hash location, $word{$var}++;, by a command that will form a string at $word{$var} by appending together the line numbers, separated by tab codes, \t.
• Process the delimiters. From each delimiter remove all blanks. If the delimiter is not empty, include it in the hash with the line numbers separated by tab codes.

1:   Four score and seven years ago our fathers brought 
2: forth on this continent, a new nation, conceived in
3: Liberty, and dedicated to the proposition that all 
4: men are created equal.
5: 
6:   Now we are engaged in a great civil war, testing 
7: whether that nation or any nation so conceived and
8: so dedicated, can long endure.  We are met on a 
9: great battle-field of that war.  We have come to
10: dedicate a portion of that field, as a final resting
11: place for those who here gave their lives that that 
12: nation might live.  It is altogether fitting and proper 
13: that we should do this. 
14:  
15:   But, in a larger sense, we can not dedicate - we 
16: can not consecrate - we can not hallow - this
17: ground. The brave men, living and dead, who
18: struggled here, have consecrated it, far above our 
19: poor power to add or detract.  The world will little 
20: note, nor remember what we say here, but it
21: can never forget what we did here.  It is for us the 
22: living, rather, to be dedicated here to the unfinished
23: work which they fought here have thus far so
24: nobly advanced.  It is rather for us to be here 
25: dedicated to the great task remaining before us - 
26: that from these honored dead we take increased
27: devotion to that cause for which they gave the last
28: full measure of devotion - that we here highly
29: resolve that these dead shall not have died in vain -
30: that this nation, under God, shall have a new birth
31: of freedom - and that government of the people, by
32: the people, for the people, shall not perish from the 
33: earth. 
,  	2	2	3	6	8
	10	15	15	17	17
	18	18	20	20	22
	22	30	30	31	32	32
-  	9	15	16	16	25
	28	29	31
.  	4	8	9	12	13
	17	19	21	24	33
a  	2	6	8	10	10
	15	30
above  	18
add  	19
advanced  	24
ago  	1
all  	3
altogether  	12
and  	1	3	7	12	17	31
any  	7
are  	4	6	8
as  	10
battle  	9
be  	22	24
before  	25
birth  	30
brave  	17
brought  	1
but  	15	20
by  	31
can  	8	15	16	16	21
 . . .

to  	3	9	19	22	22	24
	25	27
under  	30
unfinished  	22
us  	21	24	25
vain  	29
war  	6	9
we  	6	8	9	13	15	15
	16	20	21	26	28
what  	20	21
whether  	7
which  	23	27
who  	11	17
will  	19
work  	23
world  	19
years  	1

• wordcount.pl: Warning: If you plan to use this file one a unix box you must first fix the end of line codes. UNIX uses a single character while Microsoft uses two characters (return and line feed codes). This may be accomplished in a simple manner by simply reading the file into the pico editor, doing a simple edit, like include and remove a blank space, then save the file. Pico will replace the Microsoft end-of-lines and replace them with UNIX end-of-lines.
• gettysburg.address
• Log file

• Each time you run the Perl processor make an entry for each error message that you correct - include the reason for your correction.
• When the program runs, note errors in the output and your responses to those errors.