Programming & Computer Science Answers

A concert hall has three seating categories: VVIP, VIP and GEN. Customers are allowed to book tickets to 

attend any concerts that will be hosted in that hall using the price category as listed in Table 1. The 

customers can book a minimum of 1 and a maximum of 10 tickets per category. 

The manager wants a program that will allow him to sell tickets to the public and to calculate the revenue

he will get from selling the tickets in a day.

 Table1: 

Ticket Category Price Catergory

VVIP R3054.61

VIP R2095.51

GEN R1077.30

3.1 Create a C++ source file called TicketSales and save it in a file called TicketSales.cpp. 

3.2 Create the following functions: 

Functions:

Function Description Marks

3.2.1 validateInput() This function will receive two parameters that will consists of

the number of tickets and ticket category respectively.

This function must then determine and return results if the 

number of tickets entered is valid as well as the catergory.

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3.2.2 determineTicketPrice() This function will receive one parameter that will consists of 

the ticket category.

The function must then determine and return the price for that 

particular catergory using the information above 

3.2.3 determineConcertPrice() This function will receive two parameters that will consists of 

the number of tickets as well as the ticket price respectively.

This function must then calculate and return the amount due 

for the concert. This amount must be inclusive of 15% vate 

rate. 

3

3.2.4 main() Add necessary pre-processor directives.

NB: The functions must be implemented above the main.

 Declare all necessary constants and variables.

 Prompt the user for the number of tickets he/she is 

buying or a zero (0) to exit program.

Fill in the blanks in the following code. The code is written to draw 4 rectangles of heights 20, 30, 40, 50 respectively and widths 20, 15, 10, 5 respectively. The centres of these rectangles are at (1,2)

initCanvas();

double x=20;

double y=20;

repeat(4){

Rectangle r( BLANK-P , BLANK-Q , x, y);

r.imprint();

x = x + BLANK-R ;

y = y + BLANK-S ;

}

To do list 

This project will record an event which will be described by Title, Description, Date, Time. The events will be stored and retrieved from a text file called events.txt. The program should read a file at a start and should store and delete new and already present events from text file. This program should find events with respect to date as well as name. All search event description should be displayed. 

When should you consider using recursive algorithms when writing a program?

Discuss in terms of advantages and disadvantages

A variable used to send information to a function is called a ___________.

1. Write the exact output of the following algorithms:

1.1. Function calcValues(valX, valY)

 return (valX + valY/2)

JustValues

 a = 14

 b = 5

 totResults = 0

 for x = 1 to 5 step 3

 results = calcValues(a, b)

 totResults = totResults + results 

 next x

display “The result is” , totResult

display “The result is” , x

1.2 Function calculate (valX, valY)

 answer = valX + valY

 return answer

JustCalculations

a = 14

 b = 5

do while a < 5

 r = calculate(a, b)

 b = a + 5

 a = a + 1

 display “a =” , a, “b =” , b, “r=” , r

loop

end

1.3.1 sub calcProc (valA, refB)

value = valA * 3

refB = value - refB

End sub

Function calcFunc (valK)

return ((valK * 2) MOD 4)

MainModule

M = 4

L = 1

K = 2

do

J = CalcFunc (M)

Call CalcProc (J, K)

Display “L = “ L, “J = “ J, “K = “ K, “M = “ M

M = M + 1

Loop Until M > 5

end

4.1.1 Students in Computer Science would like to understand the concept of Ohm’s law. You 

are required to write an application that will allow them to calculate the relation 

between Voltage, Current and Resistance using the formulas below.

V = IR 

Current (I) = V/R

Resistance= V/I

 (where I is the current, V - Voltage and R is the resistance)

4.1.1 Write a program that will assist the students:

4.1.2 Create a C++ source file called OLaw and save it in a file called OLaw.cpp.

4.2 Create the following functions: 

4.2.1 calcVoltage() This function must calculate the voltage in a circuit using the 

information given above.

4.2.2 calcCurrent() This function must calculate the current charge using the information 

given above.

4.2.3 calcResistance() This function must calculate the resistance of the flow using the 

information given above.

4.2.4 main() NB: The functions must be implemented above the main.

Add all necessary pre-processor directives.

 Declare all constants and necessary variables.

 Prompt the user for the calculation he/she would like to see

(I/I, V/v, R/r)(See Figure 4.1).

Based on the option selected by the user 

o The user must be prompted for the related data as 

shown in Figure 4.2 – Figure 4.4.

o The program must then calculate the related 

measurements based on the option by calling the 

correct function.

o Display the desired measurement.

 If an invalid option is selected an appropriate error message 

must be displayed, see Figure 4.5.

NB: Use a switch for the selection

o This process must be repeated until there no calculations to 

perform (N/n).

4.3 Rewrite 4.2 as follows:

4.3.1 Create a C++ source file called OLaw2 and save it in a file called OLaw2.cpp.

4.4 Create the following functions: 

4.3.1 calcCicuirt() This function must calculate the voltage, current and the resistance 

in a circuit using the information given above.

4.3.2 getInput() This function will prompt the user for the required input as indicated 

in Figure 4.1.

4.3.3 main() NB: The functions must be implemented below the main.

Add all necessary pre-processor directives.

 Declare all constants and necessary variables.

 Prompt the user for the input values by calling the correct 

function.

 The program must then calculate the required 

measurements by calling the correct function.

Write a function which converts an uppercase letter 'A'{'Z' to the corresponding lowercase

letter. If the parameter is not a letter it must be returned unchanged. Write a main program

which calls the function. 

Write a program with a function that takes two int parameters, adds them together, then

returns the sum. The program should ask the user for two numbers, then call the function

with the numbers as arguments, and tell the user the sum.

Write a function named times Ten . The function should have an integer parameter named

number. When times Ten is called, it should display the product of number times ten. (Note:

just write the function. Do not write a complete program.)