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2 years ago

6

The ipv6 address fields are 128 bits long, and as such there is no need to extend ip addressing by using either dhcp or nat (i.e

., these protocols become obsolete). true false

Computers and Technology

1 answer:

Minchanka [31]2 years ago

6 0

Answer:

True

Explanation:

according to coursehero it's true

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What is a special character in passwords?

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A special character is what is the 2nd key of the numbers on the top of your keyboard. Such as @#$%^&*. These are all special characters. Hope this helped :)

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4 years ago

Assume that name is a variable of type String that has been assigned a value. Write an expression whose value is a String contai

Stella [2.4K]

Corrected (Modified) Question:

i. Assume that name is a variable of type String that has been assigned a value. Write an expression whose value is a String containing the last character of the value of name. So if the value of name were "Smith" the expression's value would be "h".

ii. Given a String variable named sentence that has been initialized, write an expression whose value is the number of characters in the String referred to by sentence.

Explanation of the corrected question

The whole question has been numbered (i) and (ii) just to separate or divide it into clearer sub questions.

Some parts of the question has also been removed since they are repetition of a part of the question.

Answer:

(i) name.charAt(name.length() - 1)

(ii) sentence.length()

Explanation:

No language has been specified in the question for the code to be written in. However, I have chosen to write it in Java.

(i) In Java, to get a particular character in a string <em>str</em>, the function, charAt(x) is used, where x in the function represents the index of the character to be fetched. This is written as str.charAt(x).

In our case, x is the index of the last character in our string. To get the index of the last character in a string say <em>str</em>, the length of the string itself is used. However, indexing starts at zero. Therefore, to get the index, it will be the 1 subtracted from the length of the string as follows:

str.length() - 1

But note that, to get the length of a string, the method length() is used. For example if,

String str = "omobowale";

str.length() will return 9

Now to the question at hand, our string variable name is <em>name. </em>

Therefore to get its last character, we write:

<em>name.charAt(name.length() - 1)</em>

So if;

name = "Smith";

name.charAt(name.length() - 1) will return "h"

(ii) As explained in (i) above, to get the length (number of characters) of the variable string <em>sentence, </em>we simply write;

<em>sentence.length()</em>

<em>PS: The length of a string is the number of characters present in the string.</em>

Hope this helps!

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3 years ago

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Answer:

Different Types of Resistors – Fixed, Variable, Linear and Non-Linear Resistors & Applications

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3 years ago

Develop a program to sort a file consisting of bonks details in the alphabetical order of author names. The details of books inc

olga2289 [7]

Use the knowledge in computational language in C++ to write the a code with alphabetical order of author name.

<h3>How to define an array in C++?</h3>

An Array is a set of values arranged in lists and accessible through a positive numeric index. So, we have that each position of our Array is a variable of the type of our Array, so we have to have a way to initialize this set of variables.

<em>#include <iostream></em>

<em>#include <iomanip></em>

<em>#include <fstream></em>

<em>#include <string></em>

<em>using namespace std;</em>

<em>struct Book {</em>

<em> string title;</em>

<em> string author;</em>

<em>};</em>

<em>const int ARRAY_SIZE = 1000;</em>

<em>Book books [ARRAY_SIZE];</em>

<em>string pathname;</em>

<em>ifstream library;</em>

<em>int LoadData();</em>

<em>void ShowAll(int count);</em>

<em>void ShowBooksByAuthor(int count, string name);</em>

<em>void ShowBooksByTitle(int count, string title);</em>

<em>void sortByTitle(int count, string title);</em>

<em>void sortByAuthor(int count, string author);</em>

<em>int main()</em>

<em>{ </em>

<em> int count = 0;</em>

<em> char selector = 'q', yesNoAnswer = 'n';</em>

<em> string name;</em>

<em> string title;</em>

<em> cout << "Welcome to Forrest's Library Database." << endl;</em>

<em> cout << "Please enter the name of the backup file: ";</em>

<em> getline(cin, pathname);</em>

<em> LoadData();</em>

<em> count = LoadData();</em>

<em> cout << count << " records loaded successfully." << endl;</em>

<em> do </em>

<em> {</em>

<em> cout << endl << "\t(S)how All, Search (A)uthor, Search (T)itle, (Q)uit: "; </em>

<em> cin >> selector;</em>

<em> selector = toupper(selector);</em>

<em> switch(selector)</em>

<em> {</em>

<em> case 'S': </em>

<em> sortByTitle(count, title);</em>

<em> if (count <= 0)</em>

<em> cout << "No counts found!\n";</em>

<em> else</em>

<em> ShowAll(count);</em>

<em> break;</em>

<em> case 'A': </em>

<em> sortByAuthor(count, name);</em>

<em> cout << "bookAuthor: ";</em>

<em> cin.ignore();</em>

<em> getline(cin, name);</em>

<em> if (count <= 0)</em>

<em> cout << "No records found!\n";</em>

<em> else</em>

<em> ShowBooksByAuthor(count, name); </em>

<em> break;</em>

<em> case 'T': </em>

<em> sortByTitle(count, title);</em>

<em> cout << "bookTitle: ";</em>

<em> cin.ignore();</em>

<em> getline(cin, title);</em>

<em> if (count <= 0)</em>

<em> cout << "No records found!\n";</em>

<em> else</em>

<em> ShowBooksByTitle(count, title); </em>

<em> break; </em>

<em> }</em>

<em> }</em>

<em> while (selector != 'q' && selector != 'Q'); </em>

<em> return 0;</em>

<em>}</em>

<em>int LoadData() </em>

<em>{</em>

<em> int count = 0;</em>

<em> int i = 0;</em>

<em> library.open(pathname);</em>

<em> ifstream library(pathname);</em>

<em> if (!library)</em>

<em> {</em>

<em> cout << "Cannot open backup file" << endl;</em>

<em> return 0;</em>

<em> }</em>

<em> while (!library.eof())</em>

<em> {</em>

<em> getline(library, books[count].title);</em>

<em> getline(library, books[count].author);</em>

<em> count++;</em>

<em> }</em>

<em> return count;</em>

<em>}</em>

<em>void ShowAll(int count) </em>

<em>{</em>

<em> for (int i = 0; i < count; i++)</em>

<em> {</em>

<em> cout << books[i].title << " " << "(" << books[i].author << ")" << endl;</em>

<em> }</em>

<em>}</em>

<em>void ShowBooksByAuthor(int count, string name) </em>

<em>{</em>

<em> int j = 0;</em>

<em> for (int i = 0; i < count; i++)</em>

<em> {</em>

<em> if(books[i].author.find(name) < 100) </em>

<em> {</em>

<em> cout << books[i].title << " " << "(" << books[i].author << ")" << endl;</em>

<em> j++;</em>

<em> }</em>

<em> }</em>

<em> cout << j << " records found";}</em>

<em>void ShowBooksByTitle(int count, string title) </em>

<em>{</em>

<em> int j = 0;</em>

<em> for (int i = 0; i < count; i++)</em>

<em> {</em>

<em> if(books[i].title.find(title) < 100)</em>

<em> {</em>

<em> cout << books[i].title << " " << "(" << books[i].author << ")" << endl;</em>

<em> j++;</em>

<em> }</em>

<em> }</em>

<em> cout << j << " records found";</em>

<em>}</em>

<em>void sortByTitle(int count, string title) {</em>

<em> string temp;</em>

<em> for (int i = 0; i < count; i++) {</em>

<em> for(int j = 0; j < count - i; j++) {</em>

<em> if (books[j].title > books[j + 1].title) {</em>

<em> temp = books[j].title;</em>

<em> books[j].title = books[j + 1].title;</em>

<em> books[j + 1].title = temp;</em>

<em> }</em>

<em> }</em>

<em> }</em>

<em>}</em>

<em>void sortByAuthor(int count, string name) {</em>

<em> string temp;</em>

<em> for (int i = 0; i < count; i++) {</em>

<em> for(int j = 0; j < count - i; j++) {</em>

<em> if (books[j].author > books[j + 1].author) {</em>

<em> temp = books[j].author;</em>

<em> books[j].author = books[j + 1].author;</em>

<em> books[j + 1].author = temp;</em>

<em> }</em>

<em> }</em>

<em> }</em>

<em>}</em>

See more about C++ at brainly.com/question/19705654

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