How to use sed or awk to process the last line of a file

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There is the following text:

Abcd 1234 fds

2011 550

1023 832er 1231

After the request is processed, it is as follows:

Abcd 1234 fds

2011 550

Total1:1023 total2:832er 12end

It is judged that if it is the last line of the text, add the second column total1:, and the third column total2:, before the first column, subtract the next two characters and add end.

It is realized by sed and awk respectively.

Sed:

The code is as follows:

Echo 'abcd 1234 fds

2011 550

1023 832er 1231' | sed-r'$s / ([^] *) () ([^] *) () (..). * $/ total1:\ 1\ 2total:\ 3\ 4\ 5endbelt'

Abcd 1234 fds

2011 550

Total1:1023 total:832er 12end

Awk:

The code is as follows:

Awk'NR > 1 {print a} {adept0} END {$1 = "total1:" $1th gensub 2 = "total2:" $2X end gensub (/.. $/, "print", $0)} 'file

Awk 'BEGIN {getline a} {print a} {print astata 0} END {$1 = "total1:" $1x * * 2 = "total2:" $2 * $/, "end", 1); print}'

Awk'{if (! getline line) {print "total1:" $1 "total2:" $2 "" gensub (/.. $/, "end")} else {print line?$0 RS line:$0}}'

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