LinuxQuestions.org - For foo in bar; do

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- - For foo in bar; do (https://www.linuxquestions.org/questions/programming-9/for-foo-in-bar%3B-do-383753/)

For foo in bar; do

I have 3 file
file1

Code:

file1 line1

file1 line2

file2

Code:

file2 line1

file2 line2

file3

Code:

file3 line1

file3 line2

and i want an output like this:

Code:

file1 line1 + file2 line1 = file3 line1

file1 line2 + file2 line2 = file3 line3

I was thinking to use

For in do
and do some thing like this

Code:

#!/bin/bash

for linefile1 in $( cat file1 ); do

  for linefile2 in $( cat file2 ); do

    for linefile3 in $( cat file3 ); do

cat >> my_output_file << EOF

$linefile1 + $linefile2 = $linefile3

EOF

but it doesn't work...:cry: f

Do you mean something like this....

Code:

#!/bin/bash

# Example: ./test file1.txt file2.txt



>file3.txt

cat $1 $2 |\

while read a ; do

  echo $1 $a + $2 $a = file3.txt $a >> file3.txt

done