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Coleman-Liau-Index-Calculator

This program calculates the Coleman-Liau Index (CLI) of a given text. The Coleman-Liau index is a readability test designed to gauge the understandability of English texts. It is used to estimate the grade level required to understand a text. The formula is based on the number of letters, words, and sentences in the text.

Features

  • Calculate Text Statistics: The program analyzes the number of letters, words, and sentences in the provided text.
  • Coleman-Liau Index Calculation: Using the calculated text statistics, the program computes the Coleman-Liau index.
  • User Input Options: You can input the text either directly or by uploading a .txt file.

How It Works

The program performs the following steps:

  1. User Input: The user is prompted to choose between entering the text manually or uploading a .txt file.
  2. Text Analysis: The program counts the number of letters, words, and sentences.
  3. CLI Calculation: The Coleman-Liau index is calculated using the formula: CLI = 0.0588 * L - 0.296 * S - 15.8

where:

  • L is the average number of letters per 100 words,
  • S is the average number of sentences per 100 words.
  1. Readability Rating: The program outputs the readability level based on the Coleman-Liau index.

Example Output

Text Statistics: Letters: 456 Words: 78 Sentences: 6 Coleman-Liau Index: 8.92

Readability: 9th grade level

Usage

  1. Clone this repository or download the source code.
  2. Compile the program using a C compiler (e.g., GCC).
  3. Run the executable and follow the instructions to either enter the text manually or upload a .txt file.
  4. View the readability statistics and the Coleman-Liau index.

How to Compile and Run

To compile the program using GCC:

gcc coleman_liau.c -o coleman_liau

To run the program:

./coleman_liau