how can i delete columns beginning and ending with parenthesis in a file

Question

how can i delete columns beginning and ending with parenthesis in a file

Expectd Input - content of input.txt

ABC (BCD) EFG          


        

Answer 1

Based on the solution from @slitvinov:

BEGIN {
    RS = "[[:space:]]"
    ORS = ""
    eat = 0
}

/^\(.*\)$/ {
    next
}

/^\(/ {
    eat = 1
    next
}

/\)$/ {
    if (eat) {
        eat = 0
        next
    }
}

{
    if (eat)
        next
    print $0 RT
}

That to an .awk file and awk -f foo.awk foo.txt gives:

ABC EFG    
BCD 
DEF  BCD  
EFG HI(JKL)
ABC EFG LMN

But I think it could be done simpler...