Write a simple line editor. Keep the entire text on a linked list, one line in a separate...

Write a simple line editor. Keep the entire text on a linked list, one line in a separate node. 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 testfile1> The first line2>3> And another line4> I 33> The second line4> One more line5> L1> The first line2>3> The second line4> One more line5> And another line  // This is now line 5, not 3;5> D 2               // line 5, since L was issued from line 5;4> L                 // line 4, since one line was deleted;1> The first line2> The second line   // this and the following lines3> One more line     // now have new numbers;4> And another line4> E