a simple explanation via chatgpt 3.5

automate.rs

use std::fs::File;
use std::io::{self, Read};

fn main() {
    // Specify the file path to be read
    let file_path = "example.txt";

    // Attempt to open the file
    match File::open(file_path) {
        Ok(mut file) => {
            // Read the contents of the file into a String
            let mut contents = String::new();
            file.read_to_string(&mut contents)
                .expect("Failed to read file");

            // Print the contents
            println!("File Contents:\n{}", contents);
        }
        Err(e) => {
            // Handle file open errors
            eprintln!("Error opening the file: {}", e);
        }
    }
}