Match on enum variants in Rust
Rust interview exercise on Structs & Enums, difficulty 2 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Shape has a tuple variant and two struct variants. Write area(shape) returning an f64; a triangle's area is base × height / 2. The compiler checks that every variant is handled.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.