In what year did commercial use of the Internet become available? 1991 1996 1999 2001

Write a CashRegister class that can be used with the RetailItem class that you wrote in Chapter 6's Programming Challenge 4. The

lys-0071 [83]

Answer:

Following are the code to this question:

import java.util.*; //import package for user input

class RetailItem//defining class RetailItem

{

private String desc;//defining String variable

private int unit;//defining integer variable

private double prices;//defining double variable

RetailItem()//defining default Constructor

{

//Constructor body

}

Output:

The Sub Total value: 199.75

The Sales Tax value: 11.985

The Total value: $211.735

Explanation:

In the above code three class "RetailItem, CashRegister, and Main" is defined, in the class "RetailItem", it defines three variable that is "desc, unit, and prices", inside the class "get and set" method and the constructor is defined, that calculates its value.

In the next step, class "CashRegister" is defined, and inside the class parameterized constructor is defined, which uses the get and set method to return its value.

In the next step, the main class is declared, in the main method two-class object is created and calls its method that are "getSubtotal, getTax, and getTotal".

There is some technical error that's why full code can't be added so, please find the attached file of code.

7 0

3 years ago

Speech on inventors and inventions

vlada-n [284]

Interntors present an interesting kind of people who think in peculiar ways sometimes. This ability allows them to view certain situations in ways in which other people cannot. Because of this, they can think of new ways of how such situations can be tackled. This is how inventions are born. A person with an inventive mind sees a new situation where he thinks of a new solution how he could improve this situation with his invention.

This process is continued continuously with new generations of inventors seeing and coming back to old situations over and over again, inventing new things along the way.

4 0

3 years ago

Kelly wants to change the text in a cell so that it is centered instead of left-aligned, where should she look to make this

timurjin [86]

Answer:

c

Explanation:

I don't know if it's correct

make me brainlist

4 0

3 years ago

I am having trouble with this python question. I am in a beginner level class also so any solution that isn't too complex would

Delicious77 [7]

The code:

filename = input("> ")

with open(filename, "r") as file:

items = file.read()

items = items.split("\n")

for index, item in enumerate(items):

items[index] = item.split("\t")

for item in items:

if item[3] == "Available":

print(f"{item[1]} ({item[0]}) -- {item[2]}")

Explenation:

1. We make the user enter the file's path, in our case "food.txt". This does only work if the .txt file is in the <u>same</u> directory as our code.

2. We get the content of our .txt file with the "open" function. If we use the "open" function inside of a "with" statement we don't have to deal with closing the file after we opened it. The file will close as soon as we exit the statement. The argument "r" indicates that we only want to read the file, not do anything else with it.

3. However the variable "file" doesn't contain the <u>contents</u> of "food.txt", only the class object of our file (if you try "print(file)" you'll only get nonsense). We can simply get the content of the file by calling ".read()" after.

4. We can separate this long str using the ".split()" function. The split function seperates a string by another sertain string (in our case "\n", since the different items are seperated by a newline). Now "items" is a list of strings.

5. Next we go through all items in "items" and separate them by "\t", again using the ".split()" function. Enumerate makes a list of indexes and values from another list (in our case, "items").

6. Now we have a list of lists of strings. The only thing left to do is go through every item and print it if the item's third item is equal to "Available" (notice that this is case-sensative). And print out the result in the desired format.

The code works for me, please ask me if there is anything you don't understand (or if the code is incorrect). Happy to help :D

5 0

2 years ago

Imagine that you have an image that is too dark or too bright. Describe how you would alter the RGB settings to brighten or dark

ratelena [41]

Turn the brightness up

7 0

2 years ago