bash - multiple positional parameter assignment for "cut" command -

first ahead of time of you, hope part of day. have file list of lines 5 parameters long. such

bob:wilson:nebraska:34:yes 

i need write program in bash allow me view standard out put horizontally , allow me call lines of text in file like

$sh filename.sh 1 

bob tom dave etc.. 

or

$sh filename.sh 1 3 4 2 

bob:nebraska:34:wilson tom:iowa:27:anderson etc.. 

what have written far

cut -d : -f$1,$2,$3,$4,$5 somefile.txt | paste -s 

the problem if user puts in less 5 parameters after sh filename.sh error code. user not required put in 5 can call 5.

awk rescue!

awk -f: -v c="$1 $2 $3 $4 $5" 'begin {n=split(c,a," ")}                                       {for(i=1;i<n;i++) printf "%s", $a[i] fs;                                        printf "%s\n", $a[n]}' file 

try , let me know if need clarification.