Write a program that calculates the invoice of each flat in an apartment building. Assume that there are N flats in a building and apartment heating is the central system. 30% of bill will be shared equally among the flats, the rest 70% will be shared according to the consumption of each flat.
Sample Calculation:
• Suppose that an apartment building has 3 flats • Consumption of each flat (m3): 12.8, 23, 9.2
• Total Bill: 320.40 TL
o 30%ofbill:96.12TL
o 70%ofbill:224.28TL
• Then, the bill for each flat should be calculated as follows:
o The bill for Flat #1: 32.04 + 63.80 = 95.83 TL
o The bill for Flat #2: 32.04 + 114.63 = 146.67 TL o The bill for Flat #3: 32.04 + 45.85 = 77.89 TL
Your program must have the following methods:
a) public static void main(String[] args)
- Main method will take the inputs from the user.
- Then, it will invoke the methods calculateTheInvoice() and printBills(),
respectively.
b) public static double[] calculateTheInvoice (double[] flats, double totalBill)
- You should calculate the bill of each flat based on the given sample calculation scenario.
- This method should take the following parameters:
o A double array flats that indicates the consumption of each flat.
o A double value totalBill that contains the total consumption of the whole
apartment building.
• Then, the method should return a double array, which contains the calculated bill for each
flat, to the main() method.
c) public static void printBills (double[] bills)
- You should print the values to the console display.
- First input (N) is the number of flats in the apartment building. It is followed by N inputs
for N flat consumption, and the last input is for the total bill. o InputFormat:NC1C2C3..CnTotalBill
o Sample Input: 3 12.8 23 9.2 320.40
where,
N is the number of flats,
C1, C2, .. Cn are the consumptions of each flat, and TotalBill is the total bill for the apartment building.
d) Sample Runs
i) Sample Run 1 (Input: 3 12.8 23 9.2 320.40)
3 12.8 23 9.2 320.40 Flat #1: 95.83 Flat #2: 146.67 Flat #3: 77.89
ii) Sample Run 2 (Input: 15 12 14.2 15.87 21.4 19 13 8.1 11 15.14 16 23.14 27 5.98 7.18 17 812.90)
15 12 14.2 15.87 21.4 19 13 8.1 11 15.14 16 23.14 27 5.98 7.18 17 812.90 Flat #1: 46.47
Flat #2: 52.0
Flat #3: 56.21
Flat #4: 70.13 Flat #5: 64.09 Flat #6: 48.98 Flat #7: 36.65 Flat #8: 43.95 Flat #9: 54.37 Flat #10: 56.54 Flat #11: 74.51 Flat #12: 84.23 Flat #13: 31.31 Flat #14: 34.33 Flat #15: 59.05
iii) Sample Run 3 (Input: 5 44.02 0 17 21.01 7.56 210.82) 5 44.02 0 17 21.01 7.56 210.82
1.Flat: 85.15
2.Flat: 12.64
3.Flat: 40.65 4.Flat: 47.25 5.Flat: 25.1
2)
Write a program that will determine whether or not it is valid per the Luhn formula. The Luhn algorithm is a simple checksum formula used to validate a variety of identification numbers, such as credit card numbers. The task is to check if a given string is valid.
Validating a Number:
- Strings of length 1 or less are not valid.
- Spaces are allowed in the input.
- All other non-digit characters are not allowed.
Example 1: valid credit card number
Suppose that the following number is given as the input: 4539 1488 0343 6467- The first step of the Luhn algorithm is to double every second digit, starting from the right. We will be doubling
4_3_ 1_8_ 0_4_ 6_6_
- If doubling the number results in a number greater than 9 then subtract 9 from the product. The results for our example:
8569 2478 0383 3437
- Then, calculate the sum all of the digits:
8+5+6+9+2+4+7+8+0+3+8+3+3+4+3+7 = 80
- If the sum is evenly divisible by 10, then the number is valid.
80 is divisible by 10, and the quotient is 8 (even) Then, the given number is valid!Example 2: invalid credit card number
Suppose that the following number is given as the input: 8273 1232 7352 0569
- Double the second digits, starting from the right 7253 2262 5312 0539
- Sum the digits 7+2+5+3+2+2+6+2+5+3+1+2+0+5+3+9 = 57
- 57 is not evenly divisible by 10, so this number is not valid!
Your program must have the following methods:
a) public static void main(String[] args)
- Main method will take the input from user.
- Then it will invoke the method validateNumber() and print the result.
b) public static boolean validateNumber (String number)
- Check if a given number (String) is valid or not.
- Then, the method should return the result (boolean) to the main() method.
- The first step of the Luhn algorithm is to double every second digit, starting from the right. We will be doubling
c) Sample Runs
i) Sample Run 1
7634 78KS Invalid Input !
ii) Sample Run 2 7789!
Invalid Input !
iii) Sample Run 3 4539 1488 0343 6467
DNumber:4_3_1_8_0_4_6_6_ LNumber:8569247803833437 Number is Valid
iv) Sample Run 4 8273 1232 7352 0569
DNumber:8_7_1_3_7_5_0_6_ LNumber:7253226253120539 Number is Invalid
v) Sample Run 5 42 123 4598
DNumber:_2_2_4_9_ LNumber:441438598 Number is Invalid
vi) Sample Run 6 3 89 23 1234
DNumber:_8_2_1_3_ LNumber:379432264 Number is Valid
Write a program that takes an input letter and outputs it in a diamond shape. Given a letter, it prints a diamond starting with ‘A’, with the supplied letter at the widest point.
Your program should satisfy the following requirements:
- The first row contains one ‘A’.
- The last row contains one ‘A’.
- All rows, except the first and last, have exactly two identical letters.
- The diamond is horizontally symmetric.
- The diamond is vertically symmetric.
- The diamond has a square shape (width equals height).
- The letters form a diamond shape.
- The top half has the letters in ascending order.
- The bottom half has the letters in descending order.
a) Examples
In the following examples, spaces are indicated by character “.”.
i) Example 1 Diamond for letter ‘A’:
A
ii) Example 2 Diamond for letter ‘C’:
..A.. .B.B. C...C .B.B. ..A..
iii) Example 3 Diamond for letter ‘E’:
....A.... ...B.B... ..C...C.. .D.....D. E.......E .D.....D. ..C...C.. ...B.B... ....A....
Your program must have the following methods:
b) public static void main(String[] args)
- Main method will take the input letter from the user.
- Then, it will invoke the method constructDiamond().
- Lastly, it will invokethe method printDiamond().
c) public static char[][] constructDiamond (char letter)
- This method should take a char letter and construct the diamond shape for the given letter in a two dimensional char array.
- The size of your two dimensional array is determined based on the given letter.
- This method should return the two dimensional array to the main() method.
d) public static void printDiamond (char[][] diamond)
• This method should take a two dimensional char array and print the content of it.
e) Sample Runs
i) Sample Run 1
Enter a Letter: 7 Invalid Input !
ii) Sample Run 2 Enter a Letter: *
Invalid Input !
iii) Sample Run 3 Enter a Letter: A
A
iv) Sample Run 4 Enter a Letter: C
..A.. .B.B. C...C .B.B. ..A..
6/8
Assoc.Prof.Dr. Mustafa AĞAOĞLU
CSE1241 – F’21 | HW#4
v) Sample Run 5 Enter a Letter: d
...A... ..B.B.. .C...C. D.....D .C...C. ..B.B.. ...A...
vi) Sample Run 6 Enter a Letter: AC
Invalid Input !
