Strings Lab: Text Justification with File I/O

Before starting, review the subversion submission instructions, and ensure you have access to subversion. If you encounter any issues, please alert your lab TA.

Overview

Part 1: You will create a program that performs text justification by formatting a string so that each line contains exactly 90 characters. You will first add spaces after punctuation marks, and if necessary, randomly insert additional spaces between words to reach the required line length.

Part 2: You will also implement a basic file I/O component. Your program should read the input string from a file and write the justified text to an output file. The input and output file paths should be specified by the user. Use the following files as examples.

unjustified example

justified example Note that this is not justified to 90 but 75 characters

Requirements

• Each line must be exactly 90 characters long. Define this value as a named constant.
• In the input text, every character (including punctuation) is followed by exactly one space, except for the final character of each line. In the output, punctuation marks (such as ., ,, ?, !, :, and ;) should be followed by two spaces, unless the punctuation mark is the last character on the line. The final character of each line should never be followed by a space.

change the text from normal english to pig latin. Where each word is altered, usually by adding a fabricated suffix or by moving the onset or initial consonant or consonant cluster of a word to the end of the word and adding a vocalic syllable (usually -ay or /e/) to create such a suffix.For example, Wikipedia would become Ikipediaway (taking the 'W' and 'ay' to create a suffix).

• If a line is still less than 90 characters after punctuation spacing, randomly insert spaces between words.
• Lines shorter than 40 characters are considered the end of a paragraph and should not be justified.
• Words should not be broken across lines (no hyphenation required).
• Read the input string from a file and output the justified text to a different file.

Project Setup

1. Create a project titled Lab7_LineJustify.
2. Write a program that asks the user to input the file paths for both input and output files.
3. The program will read a string from the input file, justify the text according to the rules above, and write the result to the output file.

Part 1 Example:

Input string:
Contrary to popular belief, Lorem Ipsum is not simply random text.

Output string:
Contrary to  popular belief,   Lorem Ipsum  is not   simply  random    text.

Part 2 Example:

Input file: unjustified.txt

Output file: justified.txt

Hints

Use the getline() function to read the user's input. For reference, see this example on how to use getline(). You can locate spaces and punctuation characters using the find() function, as shown in this code. Additionally, this example demonstrates how to find multiple occurrences of the same symbol. To modify strings, see this example.

To randomly insert spaces, consider the following approach:

while the string is not 90 characters:
    randomly pick a position between 0 and the size of the string
    locate the first whitespace following this position
       (make sure it is not the end of the string)
    insert a space there

Random Numbers

Use srand() and rand() to generate random numbers. Here is an example:

#include <ctime>
#include <iostream>

using namespace std;

int main() {
    srand(time(nullptr));
    
    // Generate random numbers
    for (int i = 0; i < 10; i++) {
        cout << rand() << endl;
    }
    
    // Random numbers between 0-9
    for (int i = 0; i < 10; i++) {
        cout << rand() % 10 << endl;
    }
    
    // Random numbers between 1-10
    for (int i = 0; i < 10; i++) {
        cout << (rand() % 10) + 1 << endl;
    }
}

Milestone

For the first part of the assignment, focus on inserting spaces after punctuation marks.

Ensure your program adheres to proper programming style. Submit your projects to the subversion repository, and don’t forget to verify your submission on the web.