Welcome syntax

.github/workflows/rust.yml

@@ -0,0 +1,22 @@
+name: Rust
+
+on:
+ push:
+ branches: [ "main" ]
+ pull_request:
+ branches: [ "main" ]
+
+env:
+ CARGO_TERM_COLOR: always
+
+jobs:
+ build:
+
+ runs-on: ubuntu-latest
+
+ steps:
+ - uses: actions/checkout@v4
+ - name: Build
+ run: cargo build --verbose
+ - name: Run tests
+ run: cargo test --verbose

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+ "rust-analyzer.diagnostics.useRustcErrorCode": true
+}

exercises/01_intro/00_welcome/src/lib.rs

@@ -17,7 +17,7 @@
 // You can also find solutions to all exercises in the `solutions` git branch.
 fn greeting() -> &'static str {
  // TODO: fix me 👇
- "I'm ready to __!"
+ "I'm ready to learn Rust!"
 }
 
 // Your solutions will be automatically verified by a set of tests.

exercises/01_intro/01_syntax/src/lib.rs

@@ -3,7 +3,7 @@
 // partner in this course and it'll often guide you in the right direction!
 //
 // The input parameters should have the same type of the return type.
-fn compute(a, b) -> u32 {
+fn compute(a : u32, b : u32) -> u32 {
  // Don't touch the function body.
  a + b * 2
 }

exercises/02_basic_calculator/00_intro/src/lib.rs

@@ -1,6 +1,5 @@
 fn intro() -> &'static str {
- // TODO: fix me 👇
- "I'm ready to __!"
+ "I'm ready to build a calculator in Rust!"
 }
 
 #[cfg(test)]

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

@@ -1,6 +1,6 @@
 fn compute(a: u32, b: u32) -> u32 {
  // TODO: change the line below to fix the compiler error and make the tests pass.
- a + b * 4u8
+ a + b * (4u8 as u32)
 }
 
 #[cfg(test)]

exercises/02_basic_calculator/02_variables/src/lib.rs

@@ -8,7 +8,7 @@
 pub fn speed(start: u32, end: u32, time_elapsed: u32) -> u32 {
  // TODO: define a variable named `distance` with the right value to get tests to pass
  // Do you need to annotate the type of `distance`? Why or why not?
-
+ let distance = end - start;
  // Don't change the line below
  distance / time_elapsed
 }

exercises/02_basic_calculator/03_if_else/src/lib.rs

@@ -1,6 +1,6 @@
 /// Return `true` if `n` is even, `false` otherwise.
 fn is_even(n: u32) -> bool {
- todo!()
+ n % 2 == 0
 }
 
 #[cfg(test)]

exercises/02_basic_calculator/04_panics/src/lib.rs

@@ -2,7 +2,9 @@
 /// calculate the average speed of the journey.
 fn speed(start: u32, end: u32, time_elapsed: u32) -> u32 {
  // TODO: Panic with a custom message if `time_elapsed` is 0
-
+ if time_elapsed == 0 {
+ panic!("The journey took no time at all, that's impossible!");
+ }
  (end - start) / time_elapsed
 }