cat > round.awk << EOF func round(n) { n = n + 0.5 n = int(n) return n } /^(b|c|d)/ {print \$1,\$2,round(\$2)} EOF cat > input.txt << EOF a 0.3 b 0.5 c 0.9 d 1.0 e 1.2 EOF echo "input.txt" echo "=========" cat input.txt echo echo "round.awk" echo "=========" cat round.awk echo echo "awk -f round.awk input.txt" echo "==========================" awk -f round.awk input.txt rm round.awk input.txt