Answer:
The code to this question can be given as:
Code:
int lastVector = newScores.size() -1; //define variable lastVector that holds updated size of newScores.
newScores = oldScores; //holds value.
for (i = 0; i < SCORES_SIZE - 1; i++) //define loop.
{  	
newScores.at(i) = newScores.at(i+1); //holds value in newScores.
}
newScores.at(lastVector) = oldScores.at(0); //moving first element in last.
Explanation:
- In the given C++ program there are two vector array is defined that are "oldScores and newScores". The oldScores array holds elements that are "10, 20, 30, 40".
- In the above code, we remove the array element at first position and add it to the last position. To this process, an integer variable "lastVector" is defined.  
- This variable holds the size of the newScores variable and uses and assigns all vector array elements from oldScores to newScores. In the loop, we use the at function the removes element form first position and add in the last position.
- Then we use another for loop for print newScores array elements.  
 
        
             
        
        
        
Answer:
Mouse and Keyboard are the devices which can be used to give input to the computer.
Explanation:
Mouse and Keyboard both are connected with the CPU via USB cable. Mouse consists of 3 major buttons, left button(for click to get the task to be done), right button (to get options) and wheel (to scroll up and down the page on screen). Keyboard is use to type text and letters as per need.
 
        
             
        
        
        
Answer
Its for the purpose of  maintenance and readability
Explanation
A  presentation-oriented markup web application generates interactive web pages containing various types of markup language.
Markup is a language designed for the purposes of processing definition and presentation. It specifies code for formatting, both the layout and style, within a text file. Markup describes the structure while the styling is how it looks. it uses the code to specify the formatting which are called tags.