Question

Case Study for Question 3 and 4

The Georgetown Heritage club is organizing a running competition. All participants are
required to run 3 races: 400m, 200m, and 100m sprints. The sports club requires a system to
record the performance times of all participants for each of the 3 running events. The sports
club also wants to record the registration number and the age of each participant.

Requirement 1: The user must be prompted to input data for each participant in the correct
format up to a maximum of 40 participants. If the format is incorrect, the user must be asked
to re-enter the data. For reasons of simplicity you may assume that all times are recorded as
whole numbers (number of seconds). The user must be able to indicate when data entry for
the last participant has been completed.

Requirement 2: Based on the available data, the organizers want the system to identify:

 The registration number of the fastest runner for each race
 For each race, the average time needed by all those participants who are aged 60 and
above.
 The algorithm must be able to perform these calculations and inform the user of the
results.

Question 3

Write an algorithm based on the description above that satisfies Requirement 1 and
Requirement 2.

Any interaction with the user should be represented as appropriate display messages.
[25 marks]

Answer 1

Algorithm

Step 1: Declare MAX_SIZE = 40 and numOfEntries = 0

Step 2: Declare array for registrationNums with size MAX_SIZE

step 3: Declare four arrays for ages, scoresRace1, scoresReace2 and scoresRace3 with size MAX_SIZE

Step 4: Prompt to the user to enter registration number of participant and read it to registrationNumber

Step 5: Check the registrationNumber is valid or not. If not valid, print the error message "Registration number is not valid" and go to step 4.

Step 6: Prompt to the user to enter age of participant and read it to age

Step 7: Check the age is valid or not. If not valid, print the error message "Age is not valid" and go to step 6.

Step 8: Prompt to the user to enter time of race1 of participant and read it to race1

Step 9: Check the race1 is valid or not. If not valid, print the error message "Score is not valid" and go to step 8.

Step 10: Prompt to the user to enter time of race2 of participant and read it to race2

Step 11: Check the race2 is valid or not. If not valid, print the error message "Score is not valid" and go to step 10.

Step 12: Prompt to the user to enter time of race3 of participant and read it to race3

Step 13: Check the race3 is valid or not. If not valid, print the error message "Score is not valid" and go to step 12.

Step 14: registrationNums[numOfEntries] = registrationNumber

ages[numOfEntries] = age

scoresRace1[numOfEntries] = race1

scoresRace2[numOfEntries] = race2

scoresRace3[numOfEntries] = race3

numOfEntries = numOfEntries + 1

Step 15: if numOfEntries is equal to MAX_SIZE go to step 18

Step 16: Ask the user "Do you want to add another entery(Y/N)? and read the answer to answer.

Step 17: If the answer is 'Y', go to step 4. Else if the answer is not 'N' print error message "Invalid answer" and go to step 16.

Step 18: Make race1FastestRunner = race2FastestRunner = race3FastestRunner = 0

race1Sum = race2Sum = race3Sum = 0

count = 0

i = 0

Step 19: If i equal to numOfEntries go to Step 24.

Step 20: if race1[i] > race1[race1FastestRunner], make race1FastestRunner = i

Step 21: if race2[i] > race2[race2FastestRunner], make race2FastestRunner = i

Step 22: if race3[i] > race3[race1FastestRunner], make race3FastestRunner = i

Step 23: if ages[i] >= 60, then make

count = count+1

race1Sum = race1Sum+race1[i]

race2Sum = race2Sum+race2[i]

race3Sum = race3Sum+race3[i]

Step 23: Go to step 19

Step 24: If numOfEntries>0 then, print

The registration number of the fastest runner for race1 = registrationNums[race1FastestRunner]

The registration number of the fastest runner for race2 = registrationNums[race2FastestRunner]

The registration number of the fastest runner for race3 = registrationNums[race3FastestRunner]

The average time needed by participants aged 60 and above for race1 = race1Sum/count

The average time needed by participants aged 60 and above for race2 = race2Sum/count

The average time needed by participants aged 60 and above for race3 = race3Sum/count

Step 25: END