initial commit

exercises/02_basic_calculator/01_integers/Cargo.toml

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+[package]
+name = "integers"
+version = "0.1.0"
+edition = "2021"
+
+[lints.rust]
+# We silence dead code warnings for the time being in order to reduce
+# compiler noise.
+# We'll re-enable them again once we explain how visibility works in Rust.
+dead_code = "allow"

exercises/02_basic_calculator/01_integers/src/lib.rs

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+fn compute(a: u32, b: u32) -> u32 {
+    // TODO: change the line below to fix the compiler error and make the tests pass.
+    let multiplier: u8 = 4;
+    a + b * multiplier
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::compute;
+
+    #[test]
+    fn case() {
+        assert_eq!(compute(1, 2), 9);
+    }
+}