How to do it...

1. Create a Rust project to work on during this chapter with cargo new chapter_four.
2. Navigate into the newly-created chapter_four 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. Open the Cargo.toml file that was generated earlier for you.

6. Under [dependencies], add the following line:

 csv = "1.0.0-beta.5"

7. If you want, you can go to csv's crates.io page (https://crates.io/crates/csv) to check for the newest version and use that one instead.
8. In the src/bin folder, create a file called csv.rs
9. Add the following code and run it with cargo run --bin csv:

1    extern crate csv;
2 
3    use std::io::{BufReader, BufWriter, Read, Seek, SeekFrom,
  Write};
4    use std::fs::OpenOptions;
5 
6    fn main() {
7      let file = OpenOptions::new()
8        .read(true)
9      ...