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Solnce55 [7]
3 years ago
14

You are asked to write an app to keep track of a relatively small music library. The app should load song information from a dat

a file once the app is started. It should allow user to view, add, remove, and search for songs. The app should save the data back to the same data file when the program exits.
Computers and Technology
1 answer:
gogolik [260]3 years ago
6 0

Answer:

C++ PROGRAM

Explanation:

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On a piano, a key has a frequency, say f0. Each higher key (black or white) has a frequency of f0 * r^n, where n is the distance
vodomira [7]

Answer:

Following are the code to this question:

import math# import math module

def RaiseToPower():   # defining a function RaiseToPower

   r= math.pow(2,1/12)    # defining r variable that calcualte the decimal point value.

   return r # return r variable value.

f0= float(input()) #defining f0 variable that hold input frequency .

for n in range(0,5):#defining for loop to count all frequency

   fn = f * math.pow(RaiseToPower(),n)    # defining fn variable that calls method RaiseToPower and multiply the value by frequency

   print(fn,end=' ')    # use print method to prints all five frequency

Output:

440

440.0 466.1637615180899 493.8833012561241 523.2511306011974 554.3652619537443

Explanation:

Description of the above python code can be defined as follows:

  • In the above code first we import the package of the math module for converting frequency, after importing package a "RaiseToPower" method is declared, inside the method r variable is declared, that counts decimal value and return its value.
  • In the next step, "f0" a frequency variable is declared that input a value from the user and defined a for loop to in the loop fn variable declared, calls the method and pass its input value and stores its decimal points and at the last print its value.

6 0
3 years ago
In cell I8, enter a nested logical function to display Need to Remodel if the apartment is unoccupied (No) AND was last remodele
galina1969 [7]

Answer:

The Function is given as

=IF(AND(E8="No",G8>10),"Need to remodel","No Change")

Explanation:

The syntax of the IF condition in excel is given as

IF(Test,If true,If false)

So here the test is an and component such that the house has to be unoccupied which is indicated as E8 because the E column contain the occupancy of the apartments, and the G8 is the last remodeling time, so the test statement is the AND operation of the conditions as

E8="No" indicating that house is unoccupied

G8>10 indicating that the last remodelling was more that 10 years ago

So the test is given as

AND(E8="No",G8>10)

Now the statement if the test true is the recommendation for to remodel, so

"Need to remodel"

Now the statement if the test is false is given as

"No Change"

So the overall function becomes

=IF(AND(E8="No",G8>10),"Need to remodel","No Change")

3 0
3 years ago
I have wings, I am able to fly, I‘m not a bird yet I soar high in the sky. What am I?
yanalaym [24]
You are a butterfly!!
6 0
3 years ago
Read 2 more answers
A customer in a store is purchasing five items. Design a program that asks for the price of each item, and then displays the sub
kykrilka [37]
What language are you programming in? 

<span>If you are programming in C or C++, you could do something like this: </span>

<span>#include <iostream> </span>
<span>using namespace std; </span>

<span>int main(void) </span>
<span>{ </span>
<span>//declarations </span>
<span>double item1 = 0; </span>
<span>double item2 = 0; </span>
<span>double item3 = 0; </span>
<span>double item4 = 0; </span>
<span>double item5 = 0; </span>
<span>double subtotal = 0; </span>
<span>double total = 0; </span>
<span>double tax = 0; </span>

<span>//Enter Items </span>
<span>cout << "Please enter the price of item 1"; </span>
<span>cin >> item1; </span>

<span>cout << "Please enter the price of item 2"; </span>
<span>cin >> item2; </span>

<span>cout << "Please enter the price of item 3"; </span>
<span>cin >> item3; </span>

<span>cout << "Please enter the price of item 4"; </span>
<span>cin >> item4; </span>


<span>cout << "Please enter the price of item 5"; </span>
<span>cin >> item5; </span>


<span>//Compute subtotal </span>
<span>subtotal = (item1 + item2 + item3 + item4 + item5 + item6); </span>

<span>//Compute amount of tax </span>

<span>tax = subtotal * (.06); </span>

<span>//Compute total </span>

<span>total = subtotal + tax; </span>

<span>//Display subtotal, total, and amount of tax </span>

<span>cout < " The subtotal of the sale is: " << subtotal << endl; </span>
<span>cout < " The amount of sales tax is: " << tax << endl; </span>
<span>cout < " The total of the sale is: " << total << endl; </span>

<span>return 0; </span>

<span>}//end of function main </span>


<span>I know this is a very very basic C++ program but I hope it helps and good luck on your project!</span>
5 0
3 years ago
Zohan uses the following analogy to describe a concept of object-oriented programming. A button can have many uses. When it is p
Vika [28.1K]

Answer:

Polymorphism

Explanation:

You can have a basic button class that gets inherited by other classes.

class Button {

function pushButton(){}

}

class ElevatorButton extends Button{};

class BigRedButton extends Button{};

With these new classes, they inherit from the basic button class. They can decide what happens when the method pushButton() is called.

You don't need to worry about what pushButton() actually does, you can just call it if the object is of the type "Button" and you can expect it to work.

4 0
2 years ago
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