how to sum values from 2 different files?

Shell Programming and Scripting
1

Hi

I am trying to add count values from two different files into one file. Could any body please suggest me best command to do this? My problem was as follows:

a.txt b.txt c.txt
10 20 30(needed)

i tried cat a.txt b.txt > c.txt (its not adding the values)

Thanks in advance..
Praveen

2

What do you mean with "count values"?

3

not sure what you're looking for. Please post a sample input file(s) and a desired output using the vB Codes.

Also you might want to take a look at 'man paste' (if I guessed your intentions correctly).

4 
read a < a.txt
read b < b.txt
printf "%d\n" $(( $a + $b )) > c.txt
5

Hi,

Don't misunderstand about "Counts", actually i have two flat files which contains only one numeric values, i want to add both the values and store the results into third file.

file1.txt file2.txt file3.txt

 10             20                 file1.txt_value\(10\) \+ file2.txt_value \(20\)

Thanks!
Praveen

6

Hi Johnson,

Your code is working. Can you please suggest me how to change the existing script to dynamic script with parameters, such that it take three file names as 3 parameters and add the content of first two files and insert the sum value into third file? Your help will be appreciated.

script(file1name, file2name, file3name)

{

body of script

file 3 should contain sum of file1 content and file2.

}

Thanks!
Praveen

7

Try:

paste file1 file22 | awk '{ print $1+$2; }' >file3
8 
## NAME: fsub - subtract numbers in FILE1 from FILE2
## USAGE: fsub FILE1 FILE2 DESTFILE
paste "$1" "$2" | awk '{ print $2 - $1 }' > "$3"
9 
nawk '{
if(NR==FNR)
	_[NR]=$0
else
	print $0+_[FNR]
}' a.txt b.txt