Quiz 1

What is the Output of this code fragment when N = 85 (3 Marks) [5 Minutes] A = N \ 10 B = N Mod 10 C = 0 If (N Mod 2 = 0) Then C = C + 1 Else C = C + 2 End If If (A > 5) And (B > 5) Then C = C + 3 ElseIf (A > 5) Or (B > 5) Then C = C + 5 Else C = C + 6 End If N = B * C * 10 + A MsgBox ("N = " & N)

Example 1 Cones and Cylinders

Problem 1 Find the surface area of a cylinder with a given radius and height Area of top and bottom is a circle –Area Top = Area Bottom =  r 2 Area of side Circumference * Height –Area Side = 2  rh Total Area –Area = 2  r  rh = 2  r (r + h)

Algorithm Cylinder Name : Cylinder Given : r h Results : A Intermediate : None Definition –A := Cylinder(r, h) Get r Get h A = 2  r(r + h) Give A

Problem 2 Find the surface area of a cone, of given radius and height Area =  r (r + s) –Where s =  (r 2 + h 2 ) This came from an internet research

Cone Algorithm Name : Cone Given : r, h Results : A Intermediate: S Definition –A := Cone (r, h) Get r Get h s = sqrt(r^2 + h^2) A =  r (r + s) Give A

Problem 3 You are in charge of ordering supplies for Fennell Funnel Co. You need to order the plastic pellets for the manufacturing process. Calculate the volume of plastic needed if you know, –the diameter of the top, and bottom –the length of the cone, and the spout –the thickness of the walls You may assume the “extra” is needed in the manufacturing process

Funnel Algorithm Name: Funnel Given: –Dtop, Htop, Dbot, Hbot, t Results : Vol Intermediates: –Acone, Acyl Definition Vol :=Funnel(Dtop, Htop, Dbot, Hbot, t) Get Dtop, Htop Get Dbot, Hbot Get t Acone: = Cone(Dtop/2, Htop) Acyl := Cylinder(Dbot/2, Hbot) Vol = t * (Acone + Acyl) Give Vol

Write these three algorithms using Subroutines

Cylinder Get r (from a SUB) Get h (from a SUB) A = 2  r(r + h) Give A Sub Cylinder (ByVal r as Single, ByVal h as Single

Cylinder Get r (from a SUB) Get h (from a SUB) A = 2  r(r + h) Give A (to a SUB) Sub Cylinder (ByVal r as Single, ByVal h as Single, ByRef A as Single) Const Pi = A = 2*Pi*r * (r + h) End Sub

Cone Get r (from SUB) Get h (from SUB) s = sqrt(r^2 + h^2) A =  r (r + s) Give A SUB Cone (ByVal r as Single, ByVal h as Single,

Cone Get r (from SUB) Get h (from SUB) s = sqrt(r^2 + h^2) A =  r (r + s) Give A (to SUB) Sub Cone (ByVal r as Single, ByVal h as Single, ByRef A as Single) Const Pi = Dim s as Single s = (r^2 + h^2)^(1/2) A = pi * r * (r + s) End Sub

Funnel Get Dtop, Htop Get Dbot, Hbot Get t Acone: = Cone(Dtop/2, Htop) Acyl := Cylinder(Dbot/2, Hbot) Vol = t * (Acone + Acyl) Give Vol Sub Funnel ( ) Dim Dtop as Single Dim Htop as Single Dim Dbot as Single Dim Hbot as Single Dim t as Single Dim Acone as Single Dim Acyl as Single Dim Vol as Single Dtop = InputBox(“Dtop”) Htop = InputBox (“Htop”) Dbot = InputBox(“Dbot”) Htop = InputBox (“Hbot”) t = InputBox(“t”) Call Cone(Dtop/2, Htop, Acone) Call Cylinder(Dbot/2, Hbot, Acyl) Vol = t * (Acone + Acyl) MsgBox (“Vol = “ & Format(Vol,0)) End Sub

Tools Macro Run Funnel View –ToolBars Command Add Button –do a Call Funnel() –Change caption to Run Macro Funnel This is not as direct as Excel