Add a dependency within the workspace

add/Cargo.lock

@@ -9,3 +9,6 @@ version = "0.1.0"
 [[package]]
 name = "adder"
 version = "0.1.0"
+dependencies = [
+ "add_one",
+]

add/adder/Cargo.toml

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+add_one = { path = "../add_one" }

add/adder/src/main.rs

@@ -1,3 +1,6 @@
+use add_one;
+
 fn main() {
-    println!("Hello, world!");
+    let num = 10;
+    println!("Hello, world! {num} plus one is {}!", add_one::add_one(num));
 }