dealer and player dealt two initial cards
dealer wins all ties
ace card is 1 or 11
all face cards are 10
all ten cards are 10
sum of cards > 21 set lose condition (bust)
sum of dealer >sum of player =< 21, player in winner state  
sum of player = >sum of dealer =< 21, dealer in winner state  
player or dealer may sit turn, called hold condition 
player has 5 cards not over 21 is winner (rare)
Player and dealer must show one card only, until close or payout.
Normally dealer holds at 16 and above
Normally player wants extra deal if hand <16
Double down, optional if player dealt two cards of same number, but not same suit.
Player on double down must put double money up for two  hands. 

        # pretty print from autoindent and ased editor
        # Over-21 Game Shell calculator
        # written on Windows XP on eTCL
        # working under TCL version 8.5.6 and eTCL 1.0.1
        # gold on TCL WIKI, 15oct2014
        package require Tk
        namespace path {::tcl::mathop ::tcl::mathfunc}
        frame .frame -relief flat -bg aquamarine4
        pack .frame -side top -fill y -anchor center
        set names {{} {dealer first card:} }
        lappend names {dealer second card:}
        lappend names {player first card: }
        lappend names {player second card :}
        lappend names {dealer score :}
        lappend names {player score : }
        lappend names {player need card dealt? < 0 or 1 > : }
        lappend names {player declared winner < 0 or 1 >:}
        foreach i {1 2 3 4 5 6 7 8} {
            label .frame.label$i -text [lindex $names $i] -anchor e
            entry .frame.entry$i -width 35 -textvariable side$i
            grid .frame.label$i .frame.entry$i -sticky ew -pady 2 -padx 1 }
        proc about {} {
            set msg "Calculator for Over 21 Game Shell
            from TCL WIKI,
            written on eTCL "
            tk_messageBox -title "About" -message $msg }       
        proc lpick L {lindex $L [expr int(rand()*[llength $L])];}
        proc swapx { text } {
            #set text [string map [list $item $replacewith] $text] #RS
             set text [string map [list "A" "11.0"] $text] 
             set text [string map [list "J" "10.0"] $text] 
             set text [string map [list "Q" "10.0"] $text] 
             set text [string map [list "K" "10.0"] $text]
             return $text                  
                                                    }  
        proc calculate {     } {
            global answer2
            global side1 side2 side3 side4 side5
            global side6 side7 side8
            global testcase_number
            incr testcase_number 
            set cds { 1 2 3 4 5 6 7 8 9 10 J Q K A } 
            set list_values { 1 2 3 4 5 6 7 8 9 10 10 10 10 11 }
            set list_cards [ concat $cds $cds $cds $cds ]
            puts "lists cards in current deck"
            puts "$list_cards"
            set side7 0.0
            set side8 0.0
            set side1  [ lpick $list_cards ]
            set side2  [ lpick $list_cards ]
            set side3  [ lpick $list_cards ]
            set side4  [ lpick $list_cards ]
            set side5 [+  [swapx $side1 ] [swapx $side2 ] ]
            set side6 [+  [swapx $side3 ] [swapx $side4 ] ]
            set side5 [* $side5 1. ]
            set side6 [* $side6 1. ]
            puts " dealer $side5 against player $side6 "
            puts "logic values p>16 [ expr { $side6 > 16. } ]"
            puts "logic values  p<16  [ expr { $side6 < 16. } ]  "
            puts "logic values p>d [ expr { $side6 > $side5 } ] "
            puts "logic values p>17 [ expr { $side6 > 17. } ] "
            puts "logic values p<22  [ expr { $side6 < 22. } ]  "
            if { $side6 > 16. }  { set side7 0. } 
            if { $side6 < 16. }  { set side7 1. }              
            if { $side6 > $side5 && $side6 < 22. &&  $side6 > 17. }  { set side8 1. }       
                                       }
        proc fillup {aa bb cc dd ee ff gg hh} {
            .frame.entry1 insert 0 "$aa"
            .frame.entry2 insert 0 "$bb"
            .frame.entry3 insert 0 "$cc"
            .frame.entry4 insert 0 "$dd"
            .frame.entry5 insert 0 "$ee"
            .frame.entry6 insert 0 "$ff" 
            .frame.entry7 insert 0 "$gg"
            .frame.entry8 insert 0 "$hh" 
             }
        proc clearx {} {
            foreach i {1 2 3 4 5 6 7 8 } {
                .frame.entry$i delete 0 end } }
        proc reportx {} {
            global side1 side2 side3 side4 side5
            global side6 side7 side8 
            global testcase_number
            console show;
            puts "%|table $testcase_number|printed in| tcl wiki format|% "
            puts "&|quantity|dealer first card value| comment, if any|& "
            puts "&|testcase number|$testcase_number| |&"
            puts "&| $side1 :|dealer first card|   |&"
            puts "&| $side2 :|dealer second card| |& "
            puts "&| $side3 :|player first card| |& "
            puts "&| $side4 :|player second card  |  |&"
            puts "&| $side5 :|dealer score |  |&"
            puts "&| $side6 :|player score |  |&"
            puts "&| $side7 :|player need card dealt? <0 or 1 >|  |&"
            puts "&| $side8 :|winner declared <0 or 1 > |  |&"
         }
        frame .buttons -bg aquamarine4
        ::ttk::button .calculator -text "Deal" -command { calculate   }
        ::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 1.0 7.0 10.0 10.0   8.  20.0 0. 0.}
        ::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 5.0 10.0 2.0 8.0   15.  10. 1. 0. }
        ::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 4.00 5.0 5.0 6.0   9.0  11.0  1.0 0. }
        ::ttk::button .clearallx -text clear -command {clearx }
        ::ttk::button .about -text about -command about
        ::ttk::button .cons -text report -command { reportx }
        ::ttk::button .exit -text exit -command {exit}
        pack .calculator  -in .buttons -side top -padx 10 -pady 5
        pack  .clearallx .cons .about .exit .test4 .test3 .test2   -side bottom -in .buttons
        grid .frame .buttons -sticky ns -pady {0 10}
        . configure -background aquamarine4 -highlightcolor brown -relief raised -border 30
        wm title . "Over-21 Game Shell Calculator "