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

Answer:

Here is the JAVA program. Let me know if you need the program in some other programming language.

import java.util.Scanner; // used for taking input from user

public class Main{ //Main class

public static void main(String[] args) {//start of main() function body

  Scanner scan = new Scanner(System.in); // creates a Scanner type object

   String input; // stores input series

    int sum = 0; //stores the sum of the series

    System.out.println("Enter a series of numbers separated by commas: "); //prompts user to enter a series of numbers separated by comma

     input = scan.nextLine(); //reads entire input series

     String[] numbers = input.split("[, ]"); //breaks the input series based on delimiter i.e. comma and stores the split sub strings (numbers) into the numbers array

   for (int i = 0; i < numbers.length; i++) { //loops through each element of numbers array until the length of the numbers reaches

          sum += Integer.parseInt(numbers[i]); } // parses the each String element of numbers array as a signed decimal integer object and takes the sum of all the integer objects

     System.out.println("Sum of all the numbers: " + sum);  } } //displays the sum of all the numbers

Explanation:

The program prompts the user to enter a series separated by commas.

Then split() method is used to split or break the series of numbers which are in String form, into sub strings based on comma (,) . This means the series is split into separate numbers. These are stored in numbers[] array.

Next the for loop iterate through each sub string i.e. each number of the series, converts each String type decimal number to integer using Integer.parseInt and computes the sum of all these integers. The last print statement displays the sum of all numbers in series.  

If the input is 7,9,10,2,18,6

Then the output is: 7+9+10+2+18+6

sum = 52

The program and its output is attached.

Answer:

The program written in C++ is as follows; (See Explanation Section for explanation)

#include <iostream>

using namespace std;

void revstring(string word)

{

   string  stringreverse = "";

   for(int i = word.length() - 1; i>=0; i--)

 {

     stringreverse+=word[i];

 }

 cout<<stringreverse;

}

int main()

{

 string user_input;

 cout << "Enter a string:  ";

 getline (std::cin, user_input);

 getstring(user_input);

 return 0;

}

Explanation:

The method starts here

void getstring(string word)

{

This line initializes a string variable to an empty string

   string  stringreverse = "";

This iteration iterates through the character of the user input from the last to the first

   for(int i = word.length() - 1; i>=0; i--)   {

     stringreverse+=word[i];

 }

This line prints the reversed string

 cout<<stringreverse;

}

The main method starts here

int main()

{

This line declares a string variable for user input

 string user_input;

This line prompts the user for input

 cout << "Enter a string:  ";

This line gets user input

 getline (std::cin, user_input);

This line passes the input string to the method

 revstring(user_input);

 return 0;

}

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.  

Answer:

Middleware

Explanation:

In today's technology like networking, software development, web development, etc, there is a need for connectivity. The problem at hand is the variation of the tech brands which results in the difference in operating systems, applications, and connectivity protocols. This problem is solved with the introduction of Middleware.

Middleware is the solution to conflicting software applications, interconnectivity between various tech platforms. It promotes cross-platform interactions.

Answer:

When we add another bit, the amount of numbers we can make multiplies by 2. So a two-bit number can make 4 numbers, but a three-bit number can make 8.

The amount of numbers that can be made is multiplied by two for each bit to be added.

The bit is the most basic unit for storing information. Bits can either be represented as either 0 or 1. Data is represented by using this multiple bits.

The amount of numbers that can be gotten from n bits is given as 2ⁿ.

Therefore we can conclude that for each bit added the amount of numbers is multiplied by two (2).

Find more about bit at: https://brainly.com/question/20802846

Answer:

Alphabetic character spacing based on the width of each letter in a font. ... Proportional spacing is commonly used for almost all text. In this encyclopedia, the default text is a proportional typeface, and tables are "monospaced," in which all characters have the same fixed width.

hope this answer helps u

pls mark me as brainlitest .-.

Answer:

Authorization

Explanation:

Answer:

Count

Explanation:

Let's see which function does what:

SUM

COUNT

SQRT

SORT

As we see, Count is the function that gets the number of entries.

Answer:

Explanation:

Tells how many numeric entries are there.

Answer:

Explanation:

Depending on the software that Raj was using to create his project he should first see if the software itself saved the project. Usually many software such as those included in the Microsoft Office Suite save the file automatically every 5 minutes or so in case of a power outage or abrupt closure of the file. If this is not the case he should try and do a system restore with the unlikely hope that it restores an older version of his project.

In a situation like this, it would be advisable for Raj to contact IT personnels and seek if the files could be retrieved.

These way, the files could be retrieved and avoid losing his work.

Learn more : https://brainly.com/question/15315011

Answer:

d. Backdoor

Explanation:

A backdoor is a type of malware that overrides security checks and authentications to access a computer or embedded device.

When this is done, remote access is granted and databases and servers can be accessed and modified. Attackers can also give remote commands to the system.

What happened to Ann in the payroll department is probably a backdoor attack that affected her device.

Answer:

When students have completed the assignment, they simply click the Mark As Done button to let the teacher know they have finished.

Explanation: Note: The teacher does NOT receive an alert or email notification when work has been turned in, or marked as done.

Answer:

My answer to the question is $350.

The middle numbers are $300&$400.

300+400=700/2=350.

Answer:

$350

Explanation:

Answer:

num_owls_zooA = 1

num_owls_zooB = 2

num_owls_zooC = 4

num_zoos = 3

avg_owls = 0.0

avg_owls = (num_owls_zooA + num_owls_zooB + num_owls_zooC) / num_zoos

print("Average owls per zoo: " + str(int(avg_owls)))

Explanation:

Initialize the num_owls_zooA, num_owls_zooB, num_owls_zooC as 1, 2, 4 respectively

Initialize the num_zoos as 3 and avg_owls as 0

Calculate the avg_owls, sum num_owls_zooA, num_owls_zooB, num_owls_zooC and divide the result by num_zoos

Print the avg_owls as an integer (Type cast the avg_owls to integer, int(avg_owls))

Answer:

A true

Explanation:

Speeding leads to an increase in the degree of crash severity, possibly resulting in more fatalities or injuries. More damage is caused to the vehicles involved at higher speeds, increasing likelihood vehicle will not be drivable after a crash.

The statement "Speeding is one of the most prevalent factors contributing to traffic crashes" is true.

Speeding causes crashes to be more severe, which could lead to more fatalities or injuries. Higher speeds result in more damage to the involved vehicles, increasing the risk that the vehicle won't be drivable following a collision. There are many accidents increasing because of high speed.

The term "speeding" refers to moving or traveling swiftly. He paid a penalty for speeding. For many American drivers, speeding has become the standard, whether it is going over the posted speed limit, driving too quickly for the road conditions, or racing. Nationwide, speeding contributes to road fatalities.

Therefore, the statement is true.

To learn more about speeding, refer to the link:

https://brainly.com/question/15297960

#SPJ2

Answer:

#include <stack>

#include<iostream>

#include<fstream> // to read imformation from files

#include<string>

using namespace std;

int main() {

   stack<string> data;

   ifstream inFile("postfix.txt");

   string content;

   if (!inFile) {

       cout << "Unable to open file" << endl;

       exit(1); // terminate with error

   }

   while (getline(inFile, content)) {

       data.push(content);

   }

   inFile.close();

   return 0;

}

Explanation:

You were very close. Use the standard <stack> STL library, and make sure the stack elements are of the same type as what you're trying to add, i.e., std::string.

Answer:

grep -R  '^foobar'.c > variable && grep -R  'foobar$'.c >> variable

echo $variable | ls -n .

Explanation:

Bash scripting is a language used in unix and linux operating systems to interact and automate processes and manage files and packages in the system. It is an open source scripting language that has locations for several commands like echo, ls, man etc, and globbing characters.

The above statement stores and appends data of a search pattern to an already existing local variable and list them numerically as standard out 'STDOUT'.

Answer:

function Rectangle(width=1, height= 1 ) {

    this.width= width;

    this.height= height;

    this.getArea= ( ) = > {return width * height};

    this.getPerimeter= ( ) = >{ return 2( height + width)};

}

var rectangleOne= new Rectangle(4, 40)

var rectangleTwo= new Rectangle(3.5, 35.9)

console.log(rectangleOne.width, rectangleOne.height, rectangleOne.getArea( ), rectangleOne.getPerimeter( ) )

console.log(rectangleTwo.width, rectangleTwo.height, rectangleTwo.getArea( ), rectangleTwo.getPerimeter( ) )

Explanation:

This is a Javascript class definition with a constructor specifying arguments with default values of one for both width and height, and the getArea and getPerimeter methods.

Answer:

Explanation:

Hello friend !!!!!!!!!!!!

The answer is school zone

Hope this helps

plz mark as brainliest!!!!!!!

Children walking on the sidewalk, a person sitting in a parked car, and a parking lot with vehicles entering and exiting indicate a school zone (Option C).

In conclusion, children walking on the sidewalk, a person sitting in a parked car, and a parking lot with vehicles entering and exiting indicate a school zone (Option C).

Learn more in:

https://brainly.com/question/8019372

Answer:

Economy

Explanation:

Education geared towards readying students to become an employable technician or becoming skilled in a particular craft are known as vocational education. Vocational education, otherwise known as career and technical education is provided by a vocational school

It is suggested that there should be wider range of educational coverage between higher education and vocational educational due to the increasing importance of the use of technology in the workplace

As such technical vocational education is generally taken as an important tool to grow the economy while particularly reducing the unemployment among the youth.

Answer:

Here is the C++ program:

#include<iostream>  // to use input output functions

using namespace std;     //to identify objects like cin cout

void StartChar(string str)  {  // function that takes a word string as parameter and returns the first letter of that word in capital

   int i;  

   char c;

   do  //start of do while loop

   {

   for (int i = 0; i < str.length(); i++) {  //iterates through each character of the word str

       if(str.length()>25){  //checks if the length of input word is greater than 25

           cout<<"limit exceeded"; }  //displays this message if a word is more than 25 characters long

      c = str.at(i);   // returns the character at position i

       if (! ( ( c >= 'a' && c <= 'z' ) || ( c >= 'A' && c <= 'Z' ) ) ) {  //checks if the input word is contains characters other than the alphabet

            cout<<str<<" is not a word!"<<endl; break;}  //displays this message if user enters characters other than the alphabet

        if (i == 0) {  //check the first character of the input word

           str[i]=toupper(str[i]);  //converts the first character of the input word to uppercase

           cout<<str<<" starts with letter "<<str[i]<<endl;  }  // prints the letter that the word starts with in capital letter

   }   cout<<"Enter a word: ";  //prompts user to enter a word

      cin>>str;   //reads input word from user

}while(str!="#");   }    //keeps prompting user to enter a word until the user enters #

int main()   //start of the main() function body

{ string str;  //declares a variable to hold a word

cout<<"Enter a word: "; //prompts user to enter a word

cin>>str; //reads input word from user

   StartChar(str); }  //calls function passing the word to it

Explanation:

The program prompts the user to enter a word and then calls StartChar(str) method by passing the word to the function.

The function StartChar() takes that word string as argument.

do while loop starts. The for loop inside do while loop iterates through each character of the word string.

First if condition checks if the length of the input word is greater than 25 using length() method which returns the length of the str. For example user inputs "aaaaaaaaaaaaaaaaaaaaaaaaaaa". Then the message limit exceeded is printed on the screen if this if condition evaluates to true.

second if condition checks if the user enters anything except the alphabet character to form a  word. For example user $500. If this condition evaluates to true then the message $500 is not a word! is printed on the screen.

Third if condition checks if the first character of input word, convert that character to capital using toupper() method and prints the first letter of the str word in capital. For example if input word is "Computer" then this prints the message: Computer starts with the letter C in the output screen.

The program keeps prompting the user to enter the word until the user enters a hash # to end the program.

The output of the program is attached.

Answer:

string sep = "";

for (i = 0; i < NUM_VALS; i++) {

 cout << sep << hourlyTemp[i];

 sep = ", ";

}

Explanation:

Insert the snippet at the commented location.

With the absence of a join() method as found in other languages, it is always a hassle to suppress that separator comma from appearing at the beginning or the end of your output. This solution is nice since it doesn't require any magic flags to keep track of wether the first element was printed.

Answer:

1.024x10^-5

Explanation:

To calculate the transmission delay bytes for the token,

we have the token to be = 64bytes and 10mbps rate.

The transmission delay = 64bytes/10mbps

= 51.2 microseconds

A microsecond is a millionth of a second.

= 5.12 x 10^-5

The question says the average number of stations that the token will pass through is 20. Remember this value is gotten from 40/2

20 x 5.12 x 10^-5

= 0.001024

= 1.024x10^-5

Therefore on an idle network with 40 stations, the average wait is

= 1.024x10^-5

Answer:

To verify transactions have the correct date assigned to them.

To verify that an account balance is within its credit limit.

To verify that all transactions have been recorded for the period.

Explanation:

Answer:

Here is the Python function readList:

def readList(filename):  #function definition of readList that takes a filename as a parameter and returns a list of integers in the file

   list = []  # declares an empty list

   with open(filename, 'r') as infile:  # opens the file in read mode by an object infile

       lines = infile.readlines()  # returns a list with each line in file as a list item

       for line in lines:   #loops through the list of each line

           i = line[:-1]  # removes new line break which is the last character of the list of line

           list.append(i)  # add each list item i.e. integers in the list

       return list  #returns the list of integers

#in order to check the working of the above function use the following function call and print statement to print the result on output screen

print(readList("file.txt")) #calls readList function by passing a file name to it

Explanation:

The program is well explained in the comments mentioned with each line of the code.

The program declares an empty list.

Then it opens the input file in read mode using the object infile.

Next it uses readLines method which returns a list with each line of the file as a list item.

Next the for loop iterates through each item of the file which is basically integer one per line

It adds each item of list i.e. each integers in a line to a list using append() method.

Then the function returns the list which is the list of integers in the file.

The program along with it output is attached. The file "file.txt" contains integers 1 to 8 one per line.

I'll pick up your question from here:

Define a function print_total_inches, with parameters num_feet and num_inches, that prints the total number of inches. Note: There are 12 inches in a foot.

Sample output with inputs: 5 8

Total inches: 68

Answer:

The program is as follows:

def print_total_inches(num_feet,num_inches):

     print("Total Inches: "+str(12 * num_feet + num_inches))

print_total_inches(5,8)

inches = int(input("Inches: "))

feet = int(input("Feet: "))

print_total_inches(feet,inches)

Explanation:

This line defines the function along with the two parameters

def print_total_inches(num_feet,num_inches):

This line calculates and prints the equivalent number of inches

     print("Total Inches: "+str(12 * num_feet + num_inches))

The main starts here:

This line tests with the original arguments from the question

print_total_inches(5,8)

The next two lines prompts user for input (inches and feet)

inches = int(input("Inches: "))

feet = int(input("Feet: "))

This line prints the equivalent number of inches depending on the user input

print_total_inches(feet,inches)

Answer:

Written in Python:

def print_total_inches(num_feet,num_inches):

    print("Total inches: "+str(12 * num_feet + num_inches))

feet = int(input())

inches = int(input())

print_total_inches(feet, inches)

Explanation:

Answer:

a

Explanation:

because they need to protect the organization's information

Answer:

Abstraction

Explanation: Abstraction is a software engineer terminology that has been found to be very effective and efficient especially as it relates to object-oriented computer programming. It has helped software engineers and other computer experts to effectively manage account objects without having a knowledge of the details with regards to the Implementation process of that account object.

Answer:

Bluetooth or a wifi router or a gateway

Explanation:

Answer:

This is a management system in wireless communication that oversees radio resources and crosstalks between two radio transmitters which make use of the same channel.

Explanation:

Radio Resource Management is a management system in wireless communication that oversees radio resources and crosstalks between two radio transmitters which make use of the same channel. Its aim is to effectively manage the radio network infrastructure. Its advantages include;

1. It allows for multi-users communication instead of point-to-point channel capacity.

2. it increases the system spectral efficiency by a high order of magnitude. The introduction of advanced coding and source coding makes this possible.

3. It helps systems that are affected by co-channel interference. An example of such a system is the wireless network used in computers which are characterized by different access points that make use of the same channel frequencies.

Answer:

The last octet

Explanation:

Here in the question, given the sub net mask, we want to know which octet of the subnet mask will tell the router the corresponding host ID.

The correct answer to this is the last octet. It is the last octet that will tell the router the corresponding host ID