COMP100
Control Structure – if statement
Week 4
Lab Exercise using the if statement
Question 3-7 required
1.
Write a console-based program that prompts the user for an hourly pay rate. If the value entered is
less than $7.50, display an error message
2.
Write a console-based program that prompts a user for an hourly pay rate. If the value entered is
less than $7.50 or greater than $49.99, display an error message; otherwise, display a message
indicating that the rate is okay.
3.
If money is left in a particular bank for more than 5 years, the interest rate given by the bank is 7.5%, else the
interest rate is 5.4%. Write a program that prompt the user for the number of years that the money was left
in the bank and display the appropriate interest rate depending on the value input. How many runs should
you make to very that it works correctly?
4.
Write a console-based program that indicate and acceptance or rejection of a user’s message. A
message is short enough for a social networking service if it does not comprise of more than 140
characters. [Hint: if the user’s input is assigned to the variable message then message.Length
will automatically give you the number of characters (i.e. the length of char that makes up that
variable) in the variable message]
5.
Write an application that asks a user to enter an IQ score. If the score is a number less than 0 or
greater than 200, issue an error message; otherwise, issue an “above average”, “average”, or
“below average” message for scores over, at, or under 100, respectively
6.
Write a console-based program that prompts the user for an hourly pay rate and hours worked.
Compute and display gross pay (hours times pay rate), withholding tax, and net pay (gross pay
minus withholding tax). Withholding tax is computed as a percentage of gross pay based on the
following:
Gross Pay
Up to and including 300.00
More than300.00
7.
Withholding Percentage
10%
12%
The average cost of a college textbook is $125. There is a premium of 20% on hardcover text and a
discount of 5% on sales of more than 4 textbooks. Write a program to prompt the user for the
appropriate inputs and compute and display the before-tax cost of the textbooks.
Sample calculation:
n.k.p.
Fall 2020
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COMP100
Control Structure – if statement
Week 4
price of 10 hardcover text = 10 * 125 + premium –discount
price = 1250 + 20% of 1250 – 5% of 1250
price = $1437.50
price of 8 softcover text = 8 * 125 –discount
price = 1000 – 5% of 1000
price = $950
price of 2 softcover text = 2 * 125
price = $250
8.
Write a program that allows the user to enter two integers and a character If the character is A, add
the two integers If it is S, subtract the second integer from the first if it is M, multiply the integers
Display the results of the arithmetic
The following problems requires nested if-statements
9.
Write a console-based application that asks a user to enter an IQ score. If the score is a number less
than 0 or greater than 200, issue an error message; otherwise, issue an “above average”, “average”,
or “below average” message for scores over, at, or under 100, respectively.
10. Write a console-based program that prompts a user for an hourly pay rate. If the user enters values
less than $7.50 or greater than $49.99, prompt the user again. If the user enters an invalid value
again, display an appropriate error message. If the user enters a valid value on either the first or
second attempt, display the pay rate as well as the weekly rate, which is calculated as 40 times the
hourly rate.
11. Write a console-based program for a college’s admissions office. The user enters a numeric high
school grade point average (for example, 3.2) and an admission test score. Display the message
“Accept” if the student meets either of the following requirements:
A grade point average of 3.0 or higher and an admission test score of at least 60
A grade point average of less than 3.0 and an admission test score of at least 80
If the student does not meet either of the qualification criteria, display “Reject”.
n.k.p.
Fall 2020
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COMP100
Control Structure – if statement
Week 4
12. Write a console-based program for a lawn-mowing service. The lawn-mowing season lasts 20
weeks. The weekly fee for mowing a lot less than 400 square feet is $25. The fee for a lot that is 400
square feet or more, but less than 600 square feet, is $35 per week. The fee for a lot that is 600
square feet or over is $50 per week. Prompt the user for the length and width of a lawn, and then
display the weekly mowing fee, as well as the total fee for the 20-week season.
13. To the Lawn application you created in the above question, add a prompt that asks the user
whether the customer wants to pay (1) once, (2) twice, or (3) 20 times per season. If the user enters
1 for once, the fee for the season is simply the seasonal total. If the customer requests two
payments, each payment is half the seasonal fee plus a $5 service charge. If the user requests 20
separate payments, add a $3 service charge per week. Display the number of payments the
customer must make, each payment amount, and the total for the season.
14. Write a program that calculates the tax on an item, based on the province code. Your program will
prompt the user for the 2-letter province code, and the cost of the item and then computes the tax
based on the following table:
Province
ON
PQ
Any other province
Use named constants and if’s.
Rate
14%
13%
0%
Try to accommodate all permutations of the 2-letter code.
15. You can create a random number that is at least min but less than max using the following
statements:
Random ranNumberGenerator = new Random();
int randomNumber;
randomNumber = ranNumberGenerator.Next(min, max);
Write a console-based program that generates a random number between 1 and 10. (In other
words, min is 1 and max is 11.) Ask a user to guess the random number, then display the random
number and a message indicating whether the user’s guess was too high, too low, or correct.
16. In the game Rock Paper Scissors, two players simultaneously choose one of three options: rock,
paper, or scissors. If both players choose the same option, then the result is a tie. However, if they
choose differently, the winner is determined as follows:
Rock beats scissors, because a rock can break a pair of scissors.
Scissors beats paper, because scissors can cut paper.
Paper beats rock, because a piece of paper can cover a rock.
n.k.p.
Fall 2020
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COMP100
Control Structure – if statement
Week 4
17. Create a console-based game in which the computer randomly chooses rock, paper, or scissors. Let
the user enter a character, ‘r’, ‘p’, or ‘s’, each representing one of the three choices. Then,
determine the winner.
18. Create a console-based lottery game application. Generate three random numbers, each between 1
and 4. Allow the user to guess three numbers. Compare each of the user’s guesses to the three
random numbers and display a message that includes the user’s guess, the randomly determined
three-digit number, and the amount of money the user has won as follows:
Matching Numbers
Award ($)
Any one matching
10
Two matching
100
Three matching, not in order
1,000
Three matching in exact order
10,000
No matches
0
Make certain that your application accommodates repeating digits. For example, if a user guesses 1, 2,
and 3, and the randomly generated digits are 1, 1, and 1, do not give the user credit for three correct
guesses—just one.
n.k.p.
Fall 2020
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