Solution 0 4 1
Using bash scripting
#!/bin/bash
#
filein=$1
#
ene=`grep ! $filein | awk '{print $(NF-1)}'`
alat=`grep "lattice parameter" $filein | awk '{print $(NF-1)}'`
#
echo $alat $ene
Probably more elegant and general using awk or (as today's standard) python.