Shell Programming and Scripting

Origin file has got 180 fields. I have to change olny 12th,18th and 52nd one.
In a file new.txt I've got those changes in 4 fields (first one is index):
I know how to change ONE field with awk array. But my question is: could it be changed more than one field in one single step?

ps: one solution, of course, is to make three input files (index + each change in a separate file) and run awk 3 times;
pps: or, have 3 input files for one awk script; but I wonder if I can do this without cutting my "new.txt"

Franci

Assuming the first field of your original file is the index:

Code:

awk -F"|" '
NR==FNR{
  a[$1]=$2; b[$1]=$3; c[$1]=$4
  next
} 
a[$1]{
  $12=a[$1]; $18=b[$1]; $52=c[$1]
}1' OFS="|" new.txt origin.file

Thx a lot, Franklin.
It works, of course. But I have a question more: I want to get as output only changed data.
I tried to do it, but no success

Something like this?

Code:

awk -F"|" '
NR==FNR{
  a[$1]=$2; b[$1]=$3; c[$1]=$4
  next
} 
a[$1]{
  $12=a[$1]; $18=b[$1]; $52=c[$1]
  print
}' OFS="|" new.txt origin.file

I'm so confused right now, cause I'm 100% sure that it worked. Now it doesn't any more... Or I was dreaming
Output is the same as input (origin.file)?!?
Also second version works the same.
It's one mistake:
...missed "1"
Can you explain me, please, more about how this script works, what for is this "1"? Thx a lot.

The '1' is similar to {print}, the '1' in the first solution is a command to print all the lines.
The print command in the 2nd solution prints only the changed lines.

If it doesn't work you should post an example of both files and the desired output.

Please use code tags instead of quote tags.