A have a string, called "joshs_diary", that is huge (there was a lot of drama in middle school). But I don't want every one to know that this string is my diary. However, I also don't want to make copies of it (because my computer doesn't have enough memory). Which of the following lines will let me access this string via a new name, but without making any copies?

a. std::string book = joshs_diary;
b. std::string & book = joshs_diary; const
c. std::string * book = &joshs_diary;
d. std::string book(joshs_diary);
e. const std::string & book = joshs_diary;
f. const std::string * const book = &joshs_diary;
g. std::string * book = &joshs_diary;

Answers

Answer 1

Answer:

C and G

Explanation:

In C language, the asterisks, ' * ', and the ampersand, ' & ', are used to create pointers and references to pointers respectively. The asterisks are used with unique identifiers to declare a pointer to a variable location in memory, while the ampersand is always placed before a variable name as an r_value to the pointer declared.


Related Questions

In a system where Round Robin is used for CPU scheduling, the following is TRUE when a process cannot finish its computation during its current time quantum? The process will terminate itself. The process will be terminated by the operating system. The process's state will be changed from running to blocked. None of the mentioned.

Answers

Answer:

B. The process will be terminated by the operating system.

Explanation:

When Round Robin is used for CPU scheduling, a time scheduler which is a component of the operating system is used in regulating the operation. A time limit is set for each of the processes to be run.

So, when a process fails to complete running before its time elapses, the time scheduler would log it off and return it to the queue. This queue is in a circular form and gives each of the processes a chance to run its course.

Based on the information given regarding CPU scheduling, the correct option is C. The process's state will be changed from running to blocked.

It should be noted that in a system where Round Robin is used for CPU scheduling, when a process cannot finish its computation during its current time quantum, the process's state will be changed from running to blocked.

It should be noted that a prices transition to a blocked state occurs when it's waiting for some events like a particular resource becoming available.

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the language is Java! please help

Answers

public class Drive {

   int miles;

   int gas;

   String carType;

   public String getGas(){

       return Integer.toBinaryString(gas);

   }

   public Drive(String driveCarType){

       carType = driveCarType;

   }

   public static void main(String [] args){

       System.out.println("Hello World!");

   }

   

}

I'm pretty new to Java myself, but I think this is what you wanted. I hope this helps!

B1:B4 is a search table or a lookup value

Answers

Answer:

lookup value

Explanation:

What is his resolution amount

Answers

I think it’s 92 I mean yh

What are two examples of items in Outlook?

a task and a calendar entry
an e-mail message and an e-mail address
an e-mail address and a button
a button and a tool bar

Answers

Answer:

a task and a calendar entry

Explanation:

ITS RIGHT

Answer:

its A) a task and a calendar entry

Explanation:

correct on e2020

A country, called Simpleland, has a language with a small vocabulary of just “the”, “on”, “and”, “go”, “round”, “bus”, and “wheels”. For a word count vector with indices ordered as the words appear above, what is the word count vector for a document that simply says “the wheels on the bus go round and round.”

Please enter the vector of counts as follows: If the counts were ["the"=1, “on”=3, "and"=2, "go"=1, "round"=2, "bus"=1, "wheels"=1], enter 1321211.
1 point

Answers

Answer:

umm that is a todler song

Explanation:

umm that is a todler song that they sing to them when there crying

A country, called Simpleland, has a language with a small vocabulary of just “the”, “on”, “and”, “go”, “round”, “bus”, and “wheels”. As per the given scenario, the vector of counts will be 2111211. The correct option is C.

What are the ways to count items in a vector?

C++ has a built-in function that counts the length of the vector. Size is the function's name ().

It returns the size or total number of elements of the vector that was utilized to create it. There is no need for debate.

The number of observations (rows) includes deleted observations as well. In an SAS data collection, there can be a maximum of 2 63-1 observations, or roughly 9.2 quintillion observations. For the majority of users, going above that limit is quite rare.

The vector of counts in the above scenario will be 2111211.

Thus, the correct option is C.

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#SPJ2

How does asymmetric encryption work?
A.
It uses only one key to encrypt and decrypt a message.
B.
A private key is used to encrypt the message and the public key is used to decrypt the message.
C.
Either the public key or the private key can be used to encrypt and decrypt a message.
D.
Public key is used to encrypt the message and private key is used to decrypt the message.

Answers

Answer:

i choose choice D

Explanation:

reason as to my answer public keys are simply input keys used to encrypt data into either a computer or any electrical device as private keys are out put used to either erase or edit

How has the rise of mobile development and devices impacted the IT industry, IT professionals, and software development

Answers

Answer:

Throughout the interpretation section elsewhere here, the explanation of the problem is summarized.

Explanation:

The growth of smartphone production and smartphone apps and services, as well as the production of smartphones, has had a positive influence on the IT industry, IT practitioners, as well as the development of the technology. As normal, the primary focus is on smartphone apps instead of just desktop software. As we recognize, with innovative features, phone applications, and smartphones are all made, built, modernized every day, and always incorporated with either the latest technology.This has now resulted in far more jobs and employment for the IT sector, and therefore new clients for service-based businesses. It provided various-skilling the application production industry for IT experts including learning how to work on emerging technology. The demand for software production and software growth is evolving at a greater speed than it's ever been, so the increase of smartphone production and smartphones has had a very beneficial effect on perhaps the IT sector, IT practitioners, and business development.

(1) Prompt the user to enter a string of their choosing. Output the string.
Ex: Enter a sentence or phrase: The only thing we have to fear is fear itself. You entered: The only thing we have to fear is fear itself.
(2) Complete the GetNumOfCharacters() function, which returns the number of characters in the user's string. Use a for loop in this function for practice. (2 pts)
(3) In main(), call the GetNumOfCharacters() function and then output the returned result. (1 pt) (4) Implement the OutputWithoutWhitespace() function. OutputWithoutWhitespace() outputs the string's characters except for whitespace (spaces, tabs). Note: A tab is '\t'. Call the OutputWithoutWhitespace() function in main(). (2 pts)
Ex: Enter a sentence or phrase: The only thing we have to fear is fear itself. You entered: The only thing we have to fear is fear itself. Number of characters: 46 String with no whitespace: The only thing we have to fear is fear itself.

Answers

Answer:

See solution below

See comments for explanations

Explanation:

import java.util.*;

class Main {

 public static void main(String[] args) {

   //PrompT the User to enter a String

   System.out.println("Enter a sentence or phrase: ");

   //Receiving the string entered with the Scanner Object

   Scanner input = new Scanner (System.in);

   String string_input = input.nextLine();

   //Print out string entered by user

   System.out.println("You entered: "+string_input);

   //Call the first method (GetNumOfCharacters)

   System.out.println("Number of characters: "+ GetNumOfCharacters(string_input));

   //Call the second method (OutputWithoutWhitespace)

   System.out.println("String with no whitespace: "+OutputWithoutWhitespace(string_input));

   }

 //Create the method GetNumOfCharacters

   public static int GetNumOfCharacters (String word) {

   //Variable to hold number of characters

   int noOfCharactersCount = 0;

   //Use a for loop to iterate the entire string

   for(int i = 0; i< word.length(); i++){

     //Increase th number of characters each time

     noOfCharactersCount++;

   }

   return noOfCharactersCount;

 }

 //Creating the OutputWithoutWhitespace() method

 //This method will remove all tabs and spaces from the original string

 public static String OutputWithoutWhitespace(String word){

   //Use the replaceAll all method of strings to replace all whitespaces

   String stringWithoutWhiteSpace = word.replaceAll(" ","");

   return stringWithoutWhiteSpace;

 }

}

Create a TeeShirt class for Toby’s Tee Shirt Company. Fields include:

orderNumber - of type int size - of type String color - of type String price - of type double Create set methods for the order number, size, and color and get methods for all four fields. The price is determined by the size: $22.99 for XXL or XXXL, and $19.99 for all other sizes. Create a subclass named CustomTee that descends from TeeShirt and includes a field named slogan (of type String) to hold the slogan requested for the shirt, and include get and set methods for this field.

Answers

Answer:

Here is the TeeShirt class:

public class TeeShirt{  //class name

   private int orderNumber;  // private member variable of type int of class TeeShirt to store the order number

   private String size;  // to store the size of tshirt

   private String color;  //  to store the color of shirt

   private double price;  // to store the price of shirt

   public void setOrderNumber(int num){  //mutator method to set the order number

       orderNumber = num;     }    

   public void setColor(String color){  //mutator method to set the color

       this.color = color;        }      

       

     public void setSize(String sz){  //mutator method to set the shirt size

   size = sz;  

   if(size.equals("XXXL") || size.equals("XXL")){  //if shirt size is XXL or XXXL

       price = 22.99;  // set the price to 22.99 if shirt size is XXL or XXXL

   }else{  //for all other sizes of shirt

       price = 19.99;     }  }  //sets the price to 19.99 for other sizes

   public int getOrderNumber(){  //accessor method to get the order number stored in orderNumber field

       return orderNumber;     }  //returns the current orderNumber

   public String getSize(){  //accessor method to get the size stored in size field

       return size;     }  //returns the current size

   public String getColor(){  //accessor method to get the color stored in color field

       return color;     }  //returns the current color

   public double getPrice(){  //accessor method to get the price stored in price field

       return price;      }  } //returns the current price

Explanation:

Here is the sub class CustomTee:

public class CustomTee extends TeeShirt {  //class CustomTee that inherits from class TeeShirt

private String slogan;   //private member variable of type String of class CustomTee to store slogan

public void setSlogan(String slgn) {  //mutator method to set the slogan

slogan = slgn; }

public String getSlogan() {  //accessor method to get the slogan stored in slogan field

return slogan;}  } //returns the current slogan

Here is DemoTees.java

import java.util.*;

public class DemoTees{  //class name

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

TeeShirt tee1 = new TeeShirt();  //creates object of class TeeShirt named tee1

TeeShirt tee2 = new TeeShirt(); //creates object of class TeeShirt named tee2

CustomTee tee3 = new CustomTee(); //creates object of class CustomTee named tee3

CustomTee tee4 = new CustomTee();  //creates object of class CustomTee named tee4

tee1.setOrderNumber(100);  //calls setOrderNumber method of class TeeShirt using object tee1 to set orderNumber to 100

tee1.setSize("XXL");  //calls setSize method of class TeeShirt using object tee1 to set size to XXL

tee1.setColor("blue");  //calls setColor method of class TeeShirt using object tee1 to set color to blue

tee2.setOrderNumber(101);  //calls setOrderNumber method of class TeeShirt using object tee2 to set orderNumber to 101

tee2.setSize("S");  //calls setSize method of class TeeShirt using object tee2 to set size to S

tee2.setColor("gray");  //calls setColor method of class TeeShirt using object tee2 to set color to gray

tee3.setOrderNumber(102);   //calls setOrderNumber method of class TeeShirt using object tee3 of class CustomTee to set orderNumber to 102

tee3.setSize("L");  //calls setSize method of class TeeShirt using object tee3 to set size to L

tee3.setColor("red");  //calls setColor method of class TeeShirt using object tee3 to set color to red

tee3.setSlogan("Born to have fun");  //calls setSlogan method of class CustomTee using tee3 object to set the slogan to Born to have fun

tee4.setOrderNumber(104);  //calls setOrderNumber method of class TeeShirt using object tee4 of class CustomTee to set orderNumber to 104

tee4.setSize("XXXL");  //calls setSize method to set size to XXXL

tee4.setColor("black");  //calls setColor method to set color to black

tee4.setSlogan("Wilson for Mayor");  //calls setSlogan method to set the slogan to Wilson for Mayor

display(tee1);  //calls this method passing object tee1

display(tee2);  //calls this method passing object tee2

displayCustomData(tee3);  //calls this method passing object tee3

displayCustomData(tee4);  }   //calls this method passing object tee4

public static void display(TeeShirt tee) {  //method display that takes object of TeeShirt as parameter

System.out.println("Order #" + tee.getOrderNumber());  //displays the value of orderNumber by calling getOrderNumber method using object tee

System.out.println(" Description: " + tee.getSize() +  " " + tee.getColor());  //displays the values of size and color by calling methods getSize and getColor using object tee

System.out.println(" Price: $" + tee.getPrice()); }  //displays the value of price by calling getPrice method using object tee

public static void displayCustomData(CustomTee tee) {  //method displayCustomData that takes object of CustomTee as parameter

display(tee);  //displays the orderNumber size color and price by calling display method and passing object tee to it

System.out.println(" Slogan: " + tee.getSlogan());  } } //displays the value of slogan by calling getSlogan method using object tee

In this exercise we have to use the knowledge in computational language in JAVA to write the following code:

We have the code can be found in the attached image.

So in an easier way we have that the code is

public class TeeShirt{  

  private int orderNumber;

  private String size;  

  private String color;

  private double price;  

  public void setOrderNumber(int num){  

      orderNumber = num;     }    

  public void setColor(String color){  

      this.color = color;        }  

    public void setSize(String sz){  

  size = sz;  

  if(size.equals("XXXL") || size.equals("XXL")){  

      price = 22.99;  

  }else{

      price = 19.99;     }  }

  public int getOrderNumber(){  

      return orderNumber;     }

  public String getSize(){  

      return size;     }  

  public String getColor(){  

      return color;     }  

  public double getPrice(){

      return price;      }  }

public class CustomTee extends TeeShirt {  

private String slogan;  

public void setSlogan(String slgn) {

slogan = slgn; }

public String getSlogan() {

return slogan;}  }

import java.util.*;

public class DemoTees{

public static void main(String[] args)  {

TeeShirt tee1 = new TeeShirt();

TeeShirt tee2 = new TeeShirt();

CustomTee tee3 = new CustomTee();

CustomTee tee4 = new CustomTee();

tee1.setOrderNumber(100);  

tee1.setSize("XXL");  

tee1.setColor("blue");  

tee2.setOrderNumber(101);

tee2.setSize("S");  

tee2.setColor("gray");  

tee3.setOrderNumber(102);  

tee3.setSize("L");

tee3.setColor("red");  

tee3.setSlogan("Born to have fun");  

tee4.setOrderNumber(104);  

tee4.setSize("XXXL");  

tee4.setColor("black");  

tee4.setSlogan("Wilson for Mayor");  

display(tee1);  

display(tee2);

displayCustomData(tee3);

displayCustomData(tee4);  }  

public static void display(TeeShirt tee) {  

System.out.println("Order #" + tee.getOrderNumber());

System.out.println(" Description: " + tee.getSize() +  " " + tee.getColor());  

System.out.println(" Price: $" + tee.getPrice()); }

public static void displayCustomData(CustomTee tee) {

display(tee);  

System.out.println(" Slogan: " + tee.getSlogan());  } }

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Write a program that reads in 10 numbers from the user and stores them in a 1D array of size 10. Then, write BubbleSort to sort that array – continuously pushing the largest elements to the right side

Answers

Answer:

The solution is provided in the explanation section.

Detailed explanation is provided using comments within the code

Explanation:

import java.util.*;

public class Main {

//The Bubble sort method

public static void bb_Sort(int[] arr) {  

   int n = 10; //Length of array  

   int temp = 0; // create a temporal variable  

   for(int i=0; i < n; i++){  

         for(int j=1; j < (n-i); j++){  

           if(arr[j-1] > arr[j]){  

               // The bubble sort algorithm swaps elements  

               temp = arr[j-1];  

               arr[j-1] = arr[j];  

               arr[j] = temp;  

             }  

         }            

         }  

        }

 public static void main(String[] args) {

   //declaring the array of integers

   int [] array = new int[10];

   //Prompt user to add elements into the array

   Scanner in = new Scanner(System.in);

   //Use for loop to receive all 10 elements

   for(int i = 0; i<array.length; i++){

     System.out.println("Enter the next array Element");

     array[i] = in.nextInt();

   }

   //Print the array elements before bubble sort

   System.out.println("The Array before bubble sort");

   System.out.println(Arrays.toString(array));

   //Call bubble sort method

   bb_Sort(array);  

               

   System.out.println("Array After Bubble Sort");  

   System.out.println(Arrays.toString(array));

 }

}

3.What are the pros and cons of using a linked implementation of a sparse matrix, as opposed to an array-based implementation

Answers

Answer:

speed and storage

Explanation:

The pros and cons of both are mainly in regards to speed and storage. Due to linked lists elements being connected to one another it requires that each previous element be accessed in order to arrive at a specific element. This makes it much slower than an array-based implementation where any element can be quickly accessed easily due to it having a specific location. This brings us to the other aspect which is memory. Since Arrays are saved as a single block, where each element has a specific location this takes much more space in the RAM as opposed to a linked implementation which is stored randomly and as indexes of the array itself.

Array Implementation:

Pros: Much Faster and Easier to target a specific elementCons: Much More Space needed

Linked Implementation

Pros: Less overall space neededCons: Much slower speed.
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