Question

Code a simple Editor class with 2 constructors (one default, one with a string for a file name)

The Editor class in private has an instance of a LinkedList (of strings) and the position of the user (use our Point class)

create a short file - at least 5 lines - could be a program

main:

string fileName("input.txt");

Editor miniVi (fileName);

miniVi.displayLines();

C++ explain in detail plz Thank you

Answer 1

Here is the answer for your question in C++ Programming Language.

Kindly upvote if you find the answer helpful.

NOTE : I have used STL LinkedList to use as linked list, as it is not mentioned to create a linked list class. Please comment below if you have any doubts.

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CODE :

#include<iostream> #include<fstream> #include<list> using namespace std; //Create a class names "Editor" class Editor{    //Create constructors    public:        //A constructor is a method with same name as class name        //Default constructir : doesn't take any arguments        Editor(){ }        //Parameterised constructor : takes arguments        Editor(string filename){            //Create input file object to read the file            ifstream inFile;            inFile.open(filename.c_str());                       if(!inFile){                cout << "File not found..." << endl;                          }else{                //Local variable                          string line;                //Loops as long as there are lines in the file                  //Stores each line in 'line' variable                while(getline(inFile,line)){                    //Pushes the line to linked list                    lines.push_back(line);                }                //Closes the file                inFile.close();            }        }        //Method to display all lines of file        void displayLines(){            //Iterator to loop trough linked list            list<string> :: iterator i;            int k = 1;            //Loops from beginning to end of the list                      for(i = lines.begin();i!=lines.end();++i){                //Displays each value in linked list                cout << k << " " << *i << endl;                k++;            }        }        //Method that displays a particular line        void getLine(){            //Reads the line number            cout << "Enter the line number : ";            cin >> position;            //eRequired variables            int k = 1;            list<string> :: iterator i;            //Loops from beginning to the end of the linked list            for(i = lines.begin();i!=lines.end();++i){                          //If k value matches position displays the line                  if(k == position)                                      cout << *i << endl;                //Increments k by 1                k++;            }        }    //Create private instance variables    private:        //Linked list of strings (I have used STL List)        list<string> lines;        int position; }; int main(){    //Testing the code against the below lines given in question    string fileName("input.txt");    Editor miniVi (fileName);    miniVi.displayLines();    miniVi.getLine();    return 0; }

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input.txt

#include<iostream> using namespace std; int main(){    return 0; }

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SCREENSHOTS :

Please see the screenshots of the code below for the indentations of the code.

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input.txt

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OUTPUT :

Any doubts regarding this can be explained with pleasure :)