Add code

example_1/.gitignore

@@ -0,0 +1 @@
+/target

example_1/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "example_1"
+version = "0.1.0"

example_1/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "example_1"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

example_1/src/main.rs

@@ -0,0 +1,6 @@
+fn main() {
+    let mut vec = vec![1, 2, 3];
+    let first: &i32 = &vec[0];
+    vec.push(92);
+    println!("{}", *first);
+}