Problem Overview

Design and implement a basic text editor in C that manages text data using a 2D array. The program reads text from an input file, stores each line as a separate row in a 2D array, and supports interactive commands to modify the text.

Key requirements:

• Read text file line by line into a 2D array
• Support interactive editing commands:
  • I – Insert a new line after line m
  • D – Delete line m
  • A – Append a new line to the end
  • E – End editing
• Display the updated text after each operation
• Maximum capacity: 10 lines, 50 characters per line

Sample Input File

input_q1.txt:

This class is ESE 124: Programming Fundamentals
The current lab is Lab 5, 2D Array Processing
This is part 2's sample input file
This file can contain at most 10 lines
This file can contain at most 10 words
Each word can have up to 32 characters
This input file has 7 lines.

Understanding 2D Arrays for Text Storage

A 2D character array stores text as a grid:

• Each row represents one line of text
• Each column represents one character position in that line

char data[MAX_ROW][MAX_COL];
//      ↑          ↑
//   10 lines   50 chars per line

Visualization:

Row 0: ['T']['h']['i']['s'][' ']['c']['l']['a']['s']['s']...
Row 1: ['T']['h']['e'][' ']['c']['u']['r']['r']['e']['n']['t']...
Row 2: ['T']['h']['i']['s'][' ']['i']['s'][' ']['p']['a']['r']['t']...
...