Shell Programming and Scripting

0101	0.54
0102	0.48
0103	1.63

0101.txt
0102.txt
0103.txt

> -Z0.54
abcdefg
123456

declare -A TMP
while read A B; do TMP[$A]=$B; done < ABC
while read A; do echo ${TMP[${A%.*}]} | cat - $A; done < XYZ

0101    0.54
0102    0.48

-111   34
-111   33
-111   33

-112   34
-112   33
-112   33

> -Z0.54
-111   34
-111   33
-111   33

> -Z0.48
-112   34
-112   33
-112   33

declare -A TMP
while read A B; do TMP[$A]=$B; done <ABC
while read A; do echo ${TMP[${A%.*}]} | cat - $A > ${A}.new; done < XYZ
cf 010?.txt.new
0101.txt.new:
0.54
-111   34
-111   33
-111   33
0102.txt.new:
0.48
-112   34
-112   33
-112   33
0103.txt.new:
1.63
-113   34
-113   33
-114   33

awk '
  NR==FNR {
    A[$1]=$2
    next
  }
  FNR==1 {
    close(f)
    split(FILENAME,F,".")
    f=F[1] "-new." F[2]
    print "> -Z" A[F[1]] > f
  }
  {
    print >f
  }
' abc [0-9][0-9][0-9][0-9].txt