La computadora es un medio de comunicacion moderno?

8.11 LAB: Count characters - functions Write a program whose input is a character and a string, and whose output indicates the n

Shkiper50 [21]

Answer:

#include<iostream>

using namespace std;

int CountCharacters(char userChar, const string inputstr){

int k = 0;

int iter = 0;

for (iter = 0; iter < inputstr.size(); iter++){

if (inputstr[iter] == userChar){

++k; }}

return k;}

int main(){

string str;

char userChar[1];

cout<<"Char: "; cin>>userChar;

cin.ignore();

cout<<"String: "; getline(cin, str);

cout<<CountCharacters(userChar[0],str);

return 0;}

Explanation:

Written in C++:

The function is defined here:

int CountCharacters(char userChar, const string inputstr){

This initializes a count variable k to 0

int k = 0;

This initializes an iterating variable iter to 0

int iter = 0;

This iterates through the characters of the string being passed to the function

for (iter = 0; iter < inputstr.size(); iter++){

This checks for matching characters

if (inputstr[iter] == userChar){

If found, k is incremented by 1

++k; }}

This returns the total count

return k;}

The main begins here

int main(){

This declares a string variable

string str;

This declares a character variable

char userChar[1];

This gets input for the character variable

cout<<"Char: "; cin>>userChar;

This lets the user get another input

cin.ignore();

This gets input for the string variable

cout<<"String: "; getline(cin, str);

This calls the function and return the count of character in the string

cout<<CountCharacters(userChar[0],str);

6 0

3 years ago

Outline the steps necessary to prepare a storage device for storing files. Identify and briefly describe the tools used to prepa

Fantom [35]

Answer:

Outline the steps necessary to prepare a storage device for storing files.

Link the storage unit to a network, whether it be a laptop computer or a mobile device.
Firewall it with sufficient anti-virus so that it also does not affect the linked system.
The program must auto-install the storage device on the network after quarantine, and authorize it.
Test the file that requires to be moved to the storage device, then upload it to the storage device after anti virus is safe.
Should not directly pull the storage device out of the network, select the exit device option correctly and only then remove the device after it has been accepted.

Identify and briefly describe the tools used to prepare a storage device for storing files.

<em>EFSDump -</em> Users can share encrypted files by carrying certificates by using EFSDump. It is usually very time consuming to audit the users who have privileges. But it is very simple to list users who have access to encrypted files using EFSDump.

<em>SDelete -</em> Suppose Windows operating system eliminates the index and prevents access when we delete a file. All the same, attackers can still recover the contents of the file. Files that are encrypted by EFS leave the file behind on the disk. Using the SDelete tool we can modify free space to prevent the recovery of deleted files.

Explain why file systems are critical components of an operating system. What is their purpose?

Hypothetically defining file system is nothing more than the way files are called and logically organized for storage.

Ex: DOS, Windows, and Unix-based operating systems all contain various file systems where data is organized in tree structure.

Usually defines the naming of files, how long the suffix can be. The file system often includes a format indicating the access to a file.

Specify the file system or file systems that would be available with that operating system.

A file system controls the mechanism by which data is stored and accessed on a disk. This deals mainly with internal disk operations such as naming files, records, directories, documentation, storage management, and other protocol accesses.

FAT (File Allocation Table)
NTFS (New Technology File System)

Describe from an administrator perspective what is necessary to prepare a storage device for access by a user.

Connection to the storage unit is equipment-oriented. The Windows Explorer summary contains optical drives, USB keys and hard drives as separate devices, making it much easier to navigate a new computer.

To connect a Linux computer you must mount the drive by connecting it to a directory.

Usually mounting a device is a manual operation, since only the administrator determines which directory the system attaches to.

Graphical interfaces are seldom seen on Linux servers. When you plug a storage device into a USB port on your computer, nothing can happen.

Usually the mount command looks like mount/dev / sdb1/mnt, where /dev / sdb1 is the system and /mnt is the directory you want to mount it.

List a few ways that a user can utilize a file system.

System output can be improved not only by choosing the most appropriate file system(s) but also by using the various choices available for most file systems.

There are variations in the number of options depending on the specific file system, and some options can only be set at the time of development of the filesystem, even though it can be modified afterwards.

7 0

3 years ago

Using Matlab programming I need to rotate the line defined by x,y by 45 degrees around 2,2

belka [17]

Answer:

% here x and y is given which we can take as

x = 2:2:10;

y = 2:2:10;

% creating a matrix of the points

point_matrix = [x;y];

% center point of rotation which is 2,2 here

x_center_pt = x(2);

y_center_pt = y(2);

% creating a matrix of the center point

center_matrix = repmat([x_center_pt; y_center_pt], 1, length(x));

% rotation matrix with rotation degree which is 45 degree

rot_degree = pi/4;

Rotate_matrix = [cos(rot_degree) -sin(rot_degree); sin(rot_degree) cos(rot_degree)];

% shifting points for the center of rotation to be at the origin

new_matrix = point_matrix - center_matrix;

% appling rotation

new_matrix1 = Rotate_matrix*new_matrix;

Explanation:

We start the program by taking vector of the point given to us and create a matrix by adding a scaler to each units with repmat at te center point which is (2,2). Then we find the rotation matrix by taking the roatational degree which is 45 given to us. After that we shift the points to the origin and then apply rotation ans store it in a new matrix called new_matrix1.

4 0

3 years ago

software that instructs the computer how to run applications and controls the display/keyboard is know as the___.

kakasveta [241]

The answer is the alu arithmetic logic unit.

8 0

4 years ago

The default case is required in the switch selection statement.

babunello [35]

Answer: False

Explanation:

The given statement is false, as it is not compulsory that the default case is require in switch selection statement. If the default case are not properly specified in the statement then, there will be no execution occur in the switch selection statement.

It is sometimes good to have default case in switch selection statement, but it is not mandatory. The default case only executed when the correct case is present and none of the case matches in the given statement.

5 0

3 years ago