Cost Price, Markup, Discount, & Profit and eTCL demo example slot calculator, numerical analysis edit
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# using pseudocode
# possible problem instances,
initialize algorithm_result = 1.
check algorithm
f(solution) =? initial product
sticker marked_price = cost_price * (( 100. + $mark_up_percent -$discount_percent)/100.)
mark_up_units = cost_price * (mark_up_percent/100.)
profits = sticker price - cost_price
total_profits_units = profit_units * total_items_sold
check_sum = a+b+c+d+e
set answers and printout with resulting values
pseudocode: need test cases > small,medium, giant
pseudocode: need testcases within range of expected operation.
pseudocode: are there any cases too small or large to be solved?
Testcases Section
In planning any software, it is advisable to gather a number of testcases to check the results of the program. The math for the testcases can be checked by pasting statements in the TCL console. Aside from the TCL calculator display, when one presses the report button on the calculator, one will have console show access to the capacity functions (subroutines).
# pretty print from autoindent and ased editor
# Cost Price Markup calculator
# written on Windows XP on eTCL
# working under TCL version 8.5.6 and eTCL 1.0.1
# gold on TCL WIKI, 2mar2017
package require Tk
package require math::numtheory
namespace path {::tcl::mathop ::tcl::mathfunc math::numtheory }
set tcl_precision 17
frame .frame -relief flat -bg aquamarine4
pack .frame -side top -fill y -anchor center
set names {{} {cost price units :} }
lappend names {markup percent:}
lappend names {sticker discount: }
lappend names {number of items sold: }
lappend names {answers: mark_up units:}
lappend names {profit on one item units : }
lappend names {total profits on all items units: }
lappend names {sticker price units :}
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 Cost Price Markup
from TCL WIKI,
written on eTCL "
tk_messageBox -title "About" -message $msg }
proc ::tcl::mathfunc::precision {precision float} {
# tcl:wiki:Floating-point formatting, [AM]
set x [ format "%#.5g" $float ]
return $x
}
proc calculate { } {
global answer2
global side1 side2 side3 side4 side5
global side6 side7 side8
global testcase_number
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 side6 $side1
set side7 $side2
set cost_price $side1
set mark_up_percent $side2
set discount_percent $side3
set total_items_sold $side4
set marked_price [* $cost_price [/ [+ 100. $mark_up_percent [* -1. $discount_percent] ] 100. ]]
set mark_up_units [* $cost_price [/ $mark_up_percent 100. ]]
set discount_units [* $cost_price [/ $discount_percent 100. ]]
set profit_units [- $marked_price $cost_price]
set total_profits_units [* $profit_units $total_items_sold ]
set side5 $mark_up_units
set side6 $profit_units
set side7 $total_profits_units
set side8 $marked_price
}
proc fillup {aa bb cc dd ee ff gg hh} {
.frame.entry1 insert 0 "$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 answer2
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| value| comment, if any|& "
puts "&| $testcase_number:|testcase_number | |&"
puts "&| $side1 :|cost price units | |&"
puts "&| $side2 :|markup percent | |& "
puts "&| $side3 :|sticker discount | |& "
puts "&| $side4 :|number of items sold | |&"
puts "&| $side5 :|answers: mark_up units | |&"
puts "&| $side6 :|profit on one item units | |&"
puts "&| $side7 :|total profits on all items units | |&"
puts "&| $side8 :|rounded sticker price units | |&"
puts "&| [ ::tcl::mathfunc::precision 5 $side8] :|sticker price units | |&"
}
frame .buttons -bg aquamarine4
::ttk::button .calculator -text "Solve" -command { set side8 0 ; calculate }
::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 100.0 50. 10.0 10.0 50.0 40. 400.0 140.0}
::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 50.0 50.0 10.0 10.00 25.0 20.0 200.0 70.0}
::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 1000.0 50.0 10.0 10.0 500.0 400.0 4000.0 1400.0}
::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 . "Cost Price Markup Calculator"
# end of deck
Pushbutton Operation
For the push buttons, the recommended procedure is push testcase and fill frame, change first three entries etc, push solve, and then push report. Report allows copy and paste from console.For testcases in a computer session, the eTCL calculator increments a new testcase number internally, eg. TC(1), TC(2) , TC(3) , TC(N). The testcase number is internal to the calculator and will not be printed until the report button is pushed for the current result numbers. The current result numbers will be cleared on the next solve button. The command { calculate; reportx } or { calculate ; reportx; clearx } can be added or changed to report automatically. Another wrinkle would be to print out the current text, delimiters, and numbers in a TCL wiki style table as
puts " %| testcase $testcase_number | value| units |comment |%"
puts " &| volume| $volume| cubic meters |based on length $side1 and width $side2 |&"
.