# following statements can be pasted into eTCL console
    set testcase_1  [ eval expr  ( 1+1 +1+1)/4 ]  # 1 square meters
    set testcase_2  [ eval expr  ( 2+2 +4+4)/4 ]  # 3 square meters
    set testcase_3  [ eval expr  ( 3+3 +5+5)/4 ]  # 4 square meters
    set testcase_1_perimeter   [ eval expr  ( 1+1 +1+1) ]  # 4 square meters
    set testcase_2_perimeter   [ eval expr  ( 2+2 +4+4) ]  # 12 square meters
    set testcase_3_perimeter   [ eval expr ( 3+3 +5+5)  ]  # 16 square meters

        # pretty print from autoindent and ased editor
        # Sumerian Pyramid Formula calculator
        # written on Windows XP on eTCL
        # working under TCL version 8.5.6 and eTCL 1.0.1
        # gold on TCL WIKI, 15may2016
        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 {{} {length L1 meters :} }
        lappend names {width W1 meters :}
        lappend names {height H1 meters: }
        lappend names {optional, top T1 meters :}
        lappend names {optional, conversion units coefficient:}
        lappend names {answers: volume cubic meters: }
        lappend names {converted volume cubic units: }
        lappend names {volume cubic meters :}
        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 Sumerian Pyramid 
            from TCL WIKI,
            written on eTCL "
            tk_messageBox -title "About" -message $msg } 
       proc pi {} {expr acos(-1)}       
       proc calculate {     } {
            global answer2
            global side1 side2 side3 side4 side5
            global side6 side7 side8
            global testcase_number
            global average_length average_width total_surface_area 
            incr testcase_number 
            set side1 [* $side1 1. ]
            set side2 [* $side2 1. ]
            set side3 [* $side3 1. ]
            set side4 [* $side4 1. ]
            set side5 [* $side5 1. ]
            set side6 [* $side6 1. ]
            set side7 [* $side7 1. ]
            set side8 [* $side8 1. ]
            set L1 $side1  
            set T1 $side2  
            set H1 $side3 
            set conv_factor $side5 
            set sq_pyramid_vol [* $H1   [+   [* $L1 $L1 ]  [* $T1 $T1 ]  [* $L1 $L1 ] ] [/ 1. 3.] ] 
            set conv_pyramid_vol [* $sq_pyramid_vol $conv_factor ]
            set side6 $sq_pyramid_vol
            set side7 $conv_pyramid_vol
            set side8 $sq_pyramid_vol
                    }
        proc fillup {aa bb cc dd ee ff gg hh} {
            .frame.entry1 insert 0 "$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
            global average_length average_width total_surface_area
            console show;
            puts "%|table $testcase_number|printed in| tcl wiki format|% "
            puts "&| quantity| value| comment, if any|& "
            puts "&| testcase number:|$testcase_number | |&"
            puts "&| $side1 :|length L1 meters meters |   |&"
            puts "&| $side2 :|width W1 meters | |& "
            puts "&| $side3 :|top T1 meters| |& "
            puts "&| $side4 :|width W2 meters| |&"
            puts "&| $side5 :|optional, conversion units coefficient | |&"
            puts "&| $side6 :|answers: volume cubic meters |  |&"
            puts "&| $side7 :|converted volume cubic units|  |&"
            puts "&| $side8 :|volume cubic meters|  |&" 
            }
        frame .buttons -bg aquamarine4
        ::ttk::button .calculator -text "Solve" -command { calculate   }
        ::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 1.0 1.0 1.0 1.0  1.50 1.0 1.0 1.0}
        ::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 2. 2. 4.0 4.0   1.50  2.0 3.0 3.0 }
        ::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 10. 6. 4.0 4.0   1.50 2.0  4.0 4.0 }
        ::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 . "Sumerian Pyramid Formula Calculator"

  puts " %| testcase $testcase_number | value| units |comment |%"
  puts " &| volume| $volume| cubic meters |based on length $side1 and width $side2   |&"