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start [2011/05/10 11:30]
kel 		start [2013/04/30 09:48]
jadabstein
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-Multiple Choices Algorithm - by Mark Kelly +Find Delicious Food Meals Online ​
- +
-Another in the Fun with Algorithms series +
- +
-Stuff Pty Ltd sells stuff. The unit cost of the stuff varies according to the quantity ordered. Customers can order any number of items. ​ Stuff Pty Ltd use this scale: +
-1-9 items = $100 each +
-10-19 items = $97 each +
-20-29 items = $92 each +
-30-39 items = $88 each +
-40-49 items = $85 each +
-50 or more = $82 each +
- +
-Task: using pseudocode, create an algorithm to calculate the unit cost of the items at different quantities. Then calculate a total cost with 10% GST added. ​  +
-Convert the pseudocode into code. +
-Create test data to fully test all aspects of the solution’s functionality. +
-Note:  Input data need not be validated, and the interface can be very basic. +
-  +
-Sample VB2010 solution +
-Public Class Form1 +
-    ' Multiple options algorithm +
-    ' by M.Kelly 10 May 2011 +
-    ' Version 1.0 +
-    ' To Do Next: nil +
- +
-    Private Sub btnCalc_Click(ByVal sender As System.Object,​ ByVal e As System.EventArgs) Handles btnCalc.Click +
-        Dim Qty As Integer = CInt(txtQty.Text) +
-        Dim inctax As Single = 0  '​declare and initialise in one hit +
-        ' deliberately lacks validation of qty +
-        Select Case Qty +
-            Case 1 To 9 +
-                lblCostper.Text = 100 +
-            Case 10 To 19 +
-                lblCostper.Text = 97 +
-            Case 20 To 29 +
-                lblCostper.Text = 92 +
-            Case 30 To 39 +
-                lblCostper.Text = 88 +
-            Case 40 To 49 +
-                lblCostper.Text = 85 +
-            Case Else +
-                lblCostper.Text = 82 +
-        End Select +
- +
-        lblSubtotal.Text = Qty * CInt(lblCostper.Text) ​ 'using labels for output +
- +
-        '​inctax is here as a sample use of variables for calculations and  +
-        'using labels just for display purposes. +
-        'Using variables mean less converting back & forth between text and number. +
- +
-        inctax = CInt(lblSubtotal.Text) * 1.1           '​add GST   +
-        'The final total is nicely formatted currency just to show how it's done. +
-        'Nice formatting is not needed in U3O2. +
-        lblIncTax.Text = Format(inctax,​ "​$#,####​.#​0"​) +
-    End Sub +
- +
-     +
-    Private Sub Button1_Click(ByVal sender As System.Object,​ ByVal e As System.EventArgs) Handles Button1.Click +
-        End +
-    End Sub +
- +
-End Class +
- +
-  +
- +
----- +
- +
-Sample output +
-Perhaps more decorative that it needs to be for U3O2, but I can’t abide messy interfaces. +
-  +
-<​can'​t insert image!>​ +
- +
-:-( +
- +
- +
---------------------------------------------------------------------------------------------- +
- +
-Fun with Algorithms - Mark Kelly +
- +
-Use flow charts or N-S charts to elegantly solve the following algorithms. ​ Some are harder than others... ​ Try actually coding it after doing the brainwork. +
--- +
- +
-Round any decimal number UP to the next highest multiple of 0.25. +
- +
--- +
- +
-Convert any Roman number to decimal (e.g. MCMLXIX to 1969) - and/or vice versa +
- +
--- +
- +
-Convert any binary number to decimal. +
- +
--- +
- +
-Find the lowest (or greatest) common denominator of 2 integers (or report that there is no LCD or GCD). +
- +
--- +
- +
-List prime numbers up to 100 +
- +
--- +
- +
-Simulate the display of a single-digit liquid crystal display  +
- +
- +
-Assume there are 7 LCD bars like this +
- +
- _ +
-|_| +
-|_| +
- +
-Feed it any numeral or alphabetic character ​ in hexadecimal range (0 to F) and it should turn on the right bars.  (Efficiency is the key requirement here!) +
- +
--- +
- +
-Given a price including 10% GST, give the ex-tax price and the tax component, e.g. $11 inc = $10 ex + $1 GST. +
- +
--- +
- +
-Create a virtual deck of cards encoded as numbers 1 to 52.  Given any number from 1 to 52, the algorithm should return the suit and rank represented by the card. +
- +
--- +
-Create an algorithm to shuffle the virtual deck of cards  +
- +
- +
--- +
- +
-Create an algorithm to play naughts and crosses - it should be unbeatable if the algorithm plays first. +
- +
--- +
- +
-Given an number of dollars, calculate what notes or coins need to be given as change from $100.  e.g. $67 = 1 x $20, 1 x $10, 1 x $2, 1 x $1. +
- +
--- +
- +
-An electrical company is developing a new main-powered sensorlight with the following requirements:​ +
- +
-• It turns on its LED light for a predetermined time (e.g. 60 seconds) after sensing movement with its passive infrared (PIR) detector. +
- +
-• It does not turn the light on if its light detector senses that the room is already well illuminated (e.g. during the day) +
- +
-• While its light is on, any further movement detection resets the timer back to its starting value and the countdown starts again. +
- +
-Convert your algorithm into a working simulation of the light. ​ You will need to simulate: +
- +
-• The day/night sensor (e.g. with radio buttons) +
- +
-• The movement sensor (e.g. with a mouse click or keypress) +
- +
-• The LED light (e.g. with a shape changing its colour) +
- +
-Show the value of the countdown time onscreen to verify its behaviour. +
- +
- +
------------------------------------------------------------------------------------------------ +
- +
  
  
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