How to do it...

1. Create a Rust project to work on during this chapter with cargo new chapter-three.
2. Navigate into the newly created chapter-three folder. For the rest of this chapter, we will assume that your command line is currently in this directory.
3. Inside the src folder, create a new folder called bin.
4. Delete the generated lib.rs file, as we are not creating a library.
5. In the src/bin folder, create a file called text_files.rs.
6. Add the following code and run it with cargo run --bin text_files:

1    use std::fs::{File, OpenOptions};
2    use std::io::{self, BufReader, BufWriter, Lines, Write};
3    use std::io::prelude::*;
4 
5    fn main() {
6      // Create a file and fill it with data
7      let path = "./foo.txt";
8      println!("Writing some data to '{}'", path);
9      write_file(path, "Hello World!\n").expect("Failed to write to 
        file");
10     // Read entire file as a string
11     let content = read_file...