To Parameterize the Parameters passed to awk commands

Shell Programming and Scripting
1 
BEGIN { FS=OFS="|" }
{
    n = split($3, f, ",")
    for ( i=1; i<=n; i++ ) {
        $3 = f[i]
        print
    }
)

I am looking at the way to parameterize Field and column delimiters used in above awk command.. Please advise.

2

Embedded awk script:

#!/bin/bash
awk -v FS="|" -v CS="," '
BEGIN { OFS=FS; if (CS == "") CS="," }
{
    n = split($3, f, CS)
    for ( i=1; i<=n; i++ ) {
        $3 = f[i]
        print
    }
}
' inputfile

Executable awk script:

#!/usr/bin/awk -f
BEGIN { OFS=FS; if (CS == "") CS="," }
{
    n = split($3, f, CS)
    for ( i=1; i<=n; i++ ) {
        $3 = f[i]
        print
    }
}

and run it as

/path/to/scriptname.awk -v FS="|" -v CS="," inputfile