#!/bin/ksh
no=${1:-no.txt}         # name of file for no entry if $1%100 != 0
to=${2:-trun.txt}       # name of file for truncated $1 entries
ro=${3:-ro.txt}         # name of file for rounded $1 entries
bo=${4:-tro.txt}        # name of file for both rounded& & runcated $1 entries
awk -v bo="$bo" -v no="$no" -v ro="$ro" -v to="$to" 'BEGIN {rc = 1}
FNR == NR {r[rc] = r[rc] $0 "\n"
    if($0 == "ENDMDL") rc++
    next}
{   # If we got to here, we are reading lines from the 2nd file.
    # Determine exact, truncated, and rounded entry numbers.
    if (substr($1, length($1) - 5) == "00.000") {
        # $1 ends in 00.000; no truncation or rounding needed.
        entry = substr($1, 1, length($1) - 6)
        round = trunc = 0
    } else {
        # $1 is not evenly divisible by 100; calculate rounded and truncated
        # values.
        entry = 0
        round = sprintf("%.0f", $1 / 100)
        trunc = substr($1, 1, length($1) - 6)
    }
    # Determine which markers and entries to print in each output file.
    if(entry) {
        # No rounding and no truncation involved.  Write the appropriate entry
        # to each output file.
        printf("%s", r[entry]) > bo
        printf("%s", r[entry]) > no
        printf("%s", r[entry]) > ro
        printf("%s", r[entry]) > to
    } else {
        # Rounding and truncation performed; Prepare shared markers.
        rm = sprintf("Following entry (%d) comes from %s rounded:", round, $1)
        tm = sprintf("Following entry (%d) comes from %s truncated:", trunc, $1)

        # Write appropriate markers and/or entries for each output file.
        printf("%s\n%s", tm, r[trunc]) > bo
        if(trunc != round) printf("%s\n%s", rm, r[round]) > bo
        printf("Entry skipped because %s is not evenly divisible by 100.\n",
            $1) > no 
        printf("%s\n%s", rm, r[round]) > ro 
        printf("%s\n%s", tm, r[trunc]) > to
    }
}' 11.txt o.txt

chmod +x split4

./split4

./split4 no_round_or_trunc truncated rounded rounded_and_truncated