Problem 1. Text Editor using files and strings using C++ In this project, you should write a simple line editor. Keep the entire text on a file, one line in a key Enter. Start the program with entering EDIT file, after which a prompt appears along with the line number. If the letter I is entered with a number n following it, then insert the text to be followed before line n. If I is not followed by a number, then insert the text before the current line. If D is entered with two numbers n and m, one n, or no number following it, then delete lines n through m, line n, or the current line. Do the same with the command L, which stands for listing lines. If A is entered, then append the text to the existing lines. Entry E signifies exit and saving the text in a file. Here is an Example: EDIT testfile 1>The first line 2> 3> And another line 4>I3 3> The second line 4> One more line 5> L 1>The first line 2> 3> The second line 4> One more line 5> And another line // This is now line 5, not 3; 5> D2 // line 5, since L was issued from line 5; 4> L //line 4, since one line was deleted; The first line 2> The second line // this and the following lines 3> One more line // now have new numbers 4> And another line 4> E Solution I did for Insert and exit only #include <iostream> #include <fstream> #include <stdlib.h> #include <string.h> #include <limits> using namespace std; std::fstream& GotoLine(fstream& file, unsigned int num){ file.seekg(ios::beg); for(int i=0; i < num - 1; ++i){ file.ignore(numeric_limits<streamsize>::max(),\'\ \'); } return file; } int main() { char command; char character; string dataLine; int line=0,lineNumber=0; ifstream dataFile; dataFile.open(\"myFile.txt\"); cout << \"File Data is :\ \"; while(getline(dataFile,dataLine)){ cout << dataLine << \"\ \" ; lineNumber++; } cout << \"\ Enter File operation :\"; cin >> command; cin >> line; switch(command) { case \'I\': if(line <= 0) { } else{ fstream file(\"myFile.txt\"); ofstream newFile; newFile.open(\"myFile.txt\", std::ios_base::app); GotoLine(file,line); newFile << \"\ other line after \" << line; } break; case \'D\': if(line <= 0) { } else{ } break; case \'A\': if(line <= 0) { } else{ } break; case \'L\': if(line <= 0) { } else{ } break; case \'E\': cout << \"thank YOU:\ \"; exit(0); } return 0; } .

1. Problem 1. Text Editor using files and strings using C++ In this project, you should write a
simple line editor. Keep the entire text on a file, one line in a key Enter. Start the program with
entering EDIT file, after which a prompt appears along with the line number. If the letter I is
entered with a number n following it, then insert the text to be followed before line n. If I is not
followed by a number, then insert the text before the current line. If D is entered with two
numbers n and m, one n, or no number following it, then delete lines n through m, line n, or the
current line. Do the same with the command L, which stands for listing lines. If A is entered,
then append the text to the existing lines. Entry E signifies exit and saving the text in a file. Here
is an Example: EDIT testfile 1>The first line 2> 3> And another line 4>I3 3> The second line 4>
One more line 5> L 1>The first line 2> 3> The second line 4> One more line 5> And another
line // This is now line 5, not 3; 5> D2 // line 5, since L was issued from line 5; 4> L //line 4,
since one line was deleted; The first line 2> The second line // this and the following lines 3>
One more line // now have new numbers 4> And another line 4> E
Solution
I did for Insert and exit only
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <string.h>
#include <limits>
using namespace std;
std::fstream& GotoLine(fstream& file, unsigned int num){
file.seekg(ios::beg);
for(int i=0; i < num - 1; ++i){
file.ignore(numeric_limits<streamsize>::max(),' ');
}
return file;
}
int main()

2. {
char command;
char character; string dataLine;
int line=0,lineNumber=0;
ifstream dataFile;
dataFile.open("myFile.txt");
cout << "File Data is : ";
while(getline(dataFile,dataLine)){
cout << dataLine << " " ;
lineNumber++;
}
cout << " Enter File operation :";
cin >> command;
cin >> line;
switch(command)
{
case 'I':
if(line <= 0)
{
}
else{
fstream file("myFile.txt");
ofstream newFile;
newFile.open("myFile.txt", std::ios_base::app);
GotoLine(file,line);
newFile << " other line after " << line;
}
break;
case 'D':
if(line <= 0)
{
}
else{
}
break;
case 'A':

3. if(line <= 0)
{
}
else{
}
break;
case 'L':
if(line <= 0)
{
}
else{
}
break;
case 'E':
cout << "thank YOU: ";
exit(0);
}
return 0;
}