RFC: Add example of cargo add

listings/ch02-guessing-game-tutorial/no-listing-06-cargo-add/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "guessing_game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

listings/ch02-guessing-game-tutorial/no-listing-06-cargo-add/output.txt

@@ -0,0 +1,18 @@
+$ cargo add [email protected]
+    Updating crates.io index
+      Adding rand v0.8.3 to dependencies.
+             Features:
+             + alloc
+             + getrandom
+             + libc
+             + rand_chacha
+             + rand_hc
+             + std
+             + std_rng
+             - log
+             - nightly
+             - packed_simd
+             - serde
+             - serde1
+             - simd_support
+             - small_rng

listings/ch02-guessing-game-tutorial/no-listing-06-cargo-add/src/main.rs

@@ -0,0 +1,15 @@
+use std::io;
+
+fn main() {
+    println!("Guess the number!");
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+
+    io::stdin()
+        .read_line(&mut guess)
+        .expect("Failed to read line");
+
+    println!("You guessed: {guess}");
+}

src/ch02-00-guessing-game-tutorial.md

@@ -362,6 +362,13 @@ that will still compile with the code in this chapter. Any version `0.9.0` or
 greater is not guaranteed to have the same API as what the following examples
 use.
 
+Instead of manually adding the dependency by editing the *Cargo.toml* file, we
+can ask Cargo to add the dependency for us, using the `cargo add` command:
+
+```console
+{{#include ../listings/ch02-guessing-game-tutorial/no-listing-06-cargo-add/output.txt}}
+```
+
 Now, without changing any of the code, let’s build the project, as shown in
 Listing 2-2.