Pre Release OL Nov15 Final BBycot

8/18/2019 Pre Release OL Nov15 Final BBycot

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PRE-RELEASE MATERIAL

Oct/Nov 2015O Level Computer Science 2210 – Region 4

AbstractThis document provides solution to the Cambridge pre-release material

for Computer Science 2210


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1 | P a g e P r e - R e l e a s e M a t e r i a l ( O c t / N o v ’ 1 5 )

Prepared by: Blitz Computing

Pre-Release Material Tasks

A new born baby is kept in a cot in a hospital; the temperature of the baby is monitored every 10minutes. The temperature of the baby is recorded in degrees Celsius to one decimal place and must be

within the range 36.0°C to 37.5°CTASK 1

To simulate the monitoring required, write a routine that allows entry of the baby’s temperature indegrees Celsius. The routine should check whether the temperature is within the acceptable range, toohigh or too low and output a suitable message in each case.

TASK 2

Write another routine that stores the temperature taken over a three hour period in an array. Thisroutine should output the highest and lowest temperature and calculate the difference between thetemperatures.

TASK 3

For a baby who has a temperature difference of more than one degree Celsius, and/or has been outsidethe acceptable range more than twice in the three hour period, output a suitable message giving asummary of the problem.

Your program must include appropriate prompts for the entry of data. Error

messages and other outputs need to be set out clearly and understandably. All

variables, constants and other identifiers must have meaningful names. Each task

must be fully tested.


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Concept and Understanding of Tasks

All 3 tasks are a part of one big problem i.e. monitoring the baby temperature and print appropriatewarning message according to it. The general flow and algorithm can be understood by the following

diagram.

Approach to Solution

There can be many approaches to solve these tasks depending upon the understanding of person. Weare listing down the key points that reflect our understanding and we’ll solve these tasks according tofollowing assumptions.

As written in the starting scenario that inputs are taken at an interval of 10 minutes, a built-infunction “ Wait ” will be used in pseudocode and programming statements to achieve thisfunctionality.

Task 1 have to written as an independent routine/sub-routine and array will not be used tostore values.

Task 2 is also an independent routine/sub-routine. Array will be used to store temperatures anda loop of 18 iterations (input to be taken after every 10 minutes so 1 hour equals 6 inputs and 3

hours equals 18 inputs) will be used to input the values. Task 3 is a dependent task and requires input that have already been taken in task 2 but in order

to test task3 completely we will rewrite all the code and make task3 completely independent.

Programming language used to develop solution is “Microsoft Visual Basic .NET ”1, however ‘C’ languagecode is also included at the end of document.

1 Click to download Microsoft Visual Basic .NET Express edition

Variables and arrays declaration

Loop to take input temperature every 10 minutes

Record the temperatures in an array. Record owest andhighest temperature and its difference

Print approrpaite message if the recorded temperature isoutside the specified range or if the difference oftemperature is greater than 1 degrees

http://download.microsoft.com/download/1/E/5/1E5F1C0A-0D5B-426A-A603-1798B951DDAE/VS2010Express1.isohttp://download.microsoft.com/download/1/E/5/1E5F1C0A-0D5B-426A-A603-1798B951DDAE/VS2010Express1.isohttp://download.microsoft.com/download/1/E/5/1E5F1C0A-0D5B-426A-A603-1798B951DDAE/VS2010Express1.isohttp://download.microsoft.com/download/1/E/5/1E5F1C0A-0D5B-426A-A603-1798B951DDAE/VS2010Express1.iso


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Variable declaration,datatype used is floatto store decimal values

“IF” selectionstatement to checkwhether input lieswithin particular rangeor not. Then printappropriate message.

Print an informationmessage and takein ut of tem erature

Task 1 Solution (Pseudocode)

ROUTINE TASK1SET babytemp AS FLOAT

babytemp

0.0PRINT “Enter the cot temperature” INPUT babytempIF babytemp < 36.0 THEN

PRINT “Temperature is below the limit ” ELSE IF babytemp > 37.5 THEN

PRINT “Temperature is above the limit ” ELSE PRINT “Temperature is normal ” END IF

END ROUTNE

Explanation

Key Points

Variable for storing babytemperature is declared as FLOAT

IF - ELSE statements to select theappropriate message to print


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Start

SET babytemp As Floatbabytemp 0.0

PRINT Enter the cot temperatureINPUT babytemp

IF babytemp < 36.0PRINT Temperature

is below the limit

IF babytemp > 37.5

END

PRINT Temperatureis above the limit

YES

NO

NO

YES

PRINT Temperatureis normal

Task 1 Solution (Flowchart)


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Task 1 Solution (VB .NET)

Module Module1

Sub Main()Dim babytemp As Decimal = 0.0Console .WriteLine( "Enter the cot temperature" )babytemp = Console .ReadLine()If babytemp < 36.0 Then

Console .WriteLine( "Temperature is below the limit" )ElseIf babytemp > 37.5 Then

Console .WriteLine( "Temperature is above the limit" )Else

Console .WriteLine( "Temperature is normal" )End If

Console .ReadKey()End Sub

End Module

Above code is also available online at http://goo.gl/dMsAip Feel free to edit and modify it to understand it’s working.

http://goo.gl/dMsAiphttp://goo.gl/dMsAiphttp://goo.gl/dMsAiphttp://goo.gl/dMsAip


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Array declaration for 18values and normalvariables for othercalculations

Loop to take 18 inputsand calculate highestand lowesttemperatures

Built-in function toadd a delay of 10minutes after eachloop iteration

Prints highest, lowestand difference values

Task 2 Solution (Pseudocode)

ROUTINE TASK2

SET babytemp [1:18] 0.0 AS FLOAT

SET highest -10.0, lowest 1000.0, difference 0.0 AS FLOAT

FOR Count 1 to 18PRINT “Enter the cot temperature” INPUT babytemp [Count]IF babytemp[Count] < lowest THEN

lowest babytemp[Count]

END IFIF babytemp[Count] > highest THEN

highest babytemp[Count]

END IF

WAIT (10) NEXT Count

difference highest – lowestPRINT “The lowest temperature was”, lowest PRINT “The highest temperature was”, highest PRINT “The difference was”, difference

END ROUTINE

Explanation

Key Points

Array for temperature andvariables for lowest, highestand difference

FOR loop for taking 18 inputs Difference calculation at end

of loop

WAIT built-in function to adddelay of 10 minutes at eachloop iteration


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Start

SET babytemp [1:18] 0.0 As FLOATSET Count 1 AS INTEGER

SET highest -10.0, lowest 1000.0,difference 0.0 AS FLOAT

PRINT Enter the cot temperatureINPUT babytemp [Count]

IFbabytemp[Count]

< lowest

IFbabytemp[Count]

> highest

END

YES

NO

NO

YES



Count Count + 1WAIT (10)

IF Count


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Task 2 Solution (VB .NET)Module Module1

Sub Main()

'Task 2 Dim babytemp(17) As Decimal Dim lowest As Decimal = 1000.0Dim highest As Decimal = -10.0Dim difference As Decimal = 0.0For count = 0 To 17

Console .WriteLine( "Enter the cot temperature" )babytemp(count) = Console .ReadLine()If babytemp(count) < lowest Then

lowest = babytemp(count)End If If babytemp(count) > highest Then

highest = babytemp(count)End If

' Comment the line below to disable 10 minute wait Threading.Thread.Sleep(600000)

Next countdifference = highest - lowestConsole .WriteLine( "The lowest temperature was " & lowest)Console .WriteLine( "The highest temperature was " & highest)Console .WriteLine( "The difference was " & difference)Console .ReadKey()

End Sub

End Module

Above code is also available online at http://goo.gl/E2aAOE Feel free to edit and modify it to understand its working

http://goo.gl/E2aAOEhttp://goo.gl/E2aAOEhttp://goo.gl/E2aAOEhttp://goo.gl/E2aAOE


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Task 3 Solution (Pseudocode)BEGIN

SET babytemp [1:18] 0.0 AS FLOAT SET highest -10.0, lowest 1000.0, difference 0.0 AS FLOATSET out range 0 AS INTEGER FOR Count 1 to 18

PRINT “Enter the cot temperature” INPUT babytemp [Count] IF babytemp[Count] < lowest THEN

lowest babytemp[Count]END IFIF babytemp[Count] > highest THEN

highest babytemp[Count]END IFIF babytemp[Count] < 36.0 OR babytemp[Count] > 37.5 THEN

out range out range + 1

END IFWAIT (10)

NEXT Countdifference highest – lowestIF difference > 1 THEN

PRINT “Warning! The temperature difference was more than 1 degree” END IFIF out range > 2 THEN

PRINT “Warning! The temperature was out of range more than 2 times ” END IF

END

Explanation

Key Points

Array for temperature andvariables for lowest, highestand difference

FOR loop for taking 18 inputs Difference calculation at end

of loop WAIT built-in function to add

delay of 10 minutes at eachloop iteration

Variables for counting out ofrange errors

Variable & arraydeclaration

Loop to take input,calculate highest,lowest and count ofout of range values

Print appropriatewarning messagesaccording to condition


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Start

SET babytemp [1:18] 0.0 As FLOATSET Count 1, out range 0 AS INTEGER

SET highest -10.0, lowest 1000.0,difference 0.0 AS FLOAT

PRINT Enter the cot temperatureINPUT babytemp [Count]

IF

babytemp[Count]< lowest

IFbabytemp[Count]

> highest

YES

NO

NO

YES



Count Count + 1WAIT (10)

IF Count 37.5

A

Out range out range + 1YES

NO

Task 3 Solution (Flowchart)


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A

END

difference highest - lowest

IF difference > 1

IF out range > 2

PRINT Warning! The temperaturedifference was more than 1 degree

PRINT Warning! The temperature wasout of range 2 times

YES

YES

NO

NO


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Task 3 Solution (VB .NET)Module Module1

Sub Main()Dim babytemp(17) As Decimal

Dim lowest As Decimal = 1000.0Dim highest As Decimal = -10.0Dim difference As Decimal = 0.0Dim out_range As Integer = 0For count = 0 To 17

Console .WriteLine( "Enter the cot temperature" )babytemp(count) = Console .ReadLine()If babytemp(count) < lowest Then

lowest = babytemp(count)End If If babytemp(count) > highest Then

highest = babytemp(count)

End If If babytemp(count) < 36.0 Or babytemp(count) > 37.5 Then

out_range = out_range + 1End If' Comment the line below to disable 10 minute waitThreading.Thread.Sleep( 600000 )

Next countdifference = highest - lowestIf difference > 1.0 Then

Console .WriteLine( "Warning! The temperature difference was more than 1 degree" )End If If out_range > 2 Then

Console .WriteLine( "Warning! The temperature was out of range " & out_range & "times" )End If

Console .ReadKey()End Sub

End Module

Above code is also available online at http://goo.gl/7icTbT Feel free to edit and modify it to understand its working

http://goo.gl/7icTbThttp://goo.gl/7icTbThttp://goo.gl/7icTbThttp://goo.gl/7icTbT


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Solution in ‘C’ Language

Task 1

#include

int main(){

float babytemp = 0.0;printf( "Enter the cot temperature \n" );scanf( "%f" , &babytemp);if (babytemp < 36.0){

printf( "Temperature is below the limit \n" );}else if (babytemp > 37.5){

printf( "Temperature is above the limit \n" );}else printf( "Temperature is normal \n" );return 0;

}

Task 2

#include #include

int main(){

float babytemp[17];float highest = -10.0, lowest = 1000.0, difference = 0.0;int count = 0;for (count = 0; count < 18; count++){

printf( "Enter the cot temperature \n" );scanf( "%f" , &babytemp[count]);if (babytemp[count] < lowest){

lowest = babytemp[count];}if (babytemp[count] > 37.5){

highest = babytemp[count];}// Comment the following line to disable 10 min wait sleep(600000);

}difference = highest - lowest;printf( "The highest temperature was %f \n" , highest);printf( "The lowest temperature was %f \n" , lowest);printf( "The difference was %f \n" , difference);return 0;

}


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Task 3

#include #include

int main(){float babytemp[17];float highest = -10.0, lowest = 1000.0, difference = 0.0;int count = 0, out_range = 0;for (count = 0; count < 18; count++){

printf( "Enter the cot temperature \n" );scanf( "%f" , &babytemp[count]);if (babytemp[count] < lowest){

lowest = babytemp[count];}if (babytemp[count] > 37.5){

highest = babytemp[count];}if (babytemp[count] < 36.0 || babytemp[count] > 37.5){

out_range = out_range + 1;}// Comment the following line to disable 10 min wait sleep(600000);

}difference = highest - lowest;if (difference > 1){

printf( "Warning! The temperature difference was more than 1 degree \n" );}if (out_range > 2){

printf( "Warning! The temperature was out of range %d times \n" , out_range);}return 0;

}

Task 1 available online at http://goo.gl/Tjvk8j Task 2 available online at http://goo.gl/J8fuB4 Task 3 available online at http://goo.gl/Lrr5XJ

http://goo.gl/Tjvk8jhttp://goo.gl/Tjvk8jhttp://goo.gl/Tjvk8jhttp://goo.gl/J8fuB4http://goo.gl/J8fuB4http://goo.gl/J8fuB4http://goo.gl/Lrr5XJhttp://goo.gl/Lrr5XJhttp://goo.gl/Lrr5XJhttp://goo.gl/Lrr5XJhttp://goo.gl/J8fuB4http://goo.gl/Tjvk8j


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Comments & Feedback

This document is prepared by Blitz Computing to help students prepare for Computer Science 2210Paper 2.For any kind of discussion, corrections and suggestions please visit our Facebook page at:www.facebook.com/blitzcomputing

Complete solution can also be provided in other programming languages on request on our Facebookpage.
http://www.facebook.com/blitzcomputinghttp://www.facebook.com/blitzcomputinghttp://www.facebook.com/blitzcomputing

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Pre Release OL Nov15 Final BBycot