# Space Age Welcome to Space Age on Exercism's Rust Track. If you need help running the tests or submitting your code, check out `HELP.md`. ## Instructions Given an age in seconds, calculate how old someone would be on: - Mercury: orbital period 0.2408467 Earth years - Venus: orbital period 0.61519726 Earth years - Earth: orbital period 1.0 Earth years, 365.25 Earth days, or 31557600 seconds - Mars: orbital period 1.8808158 Earth years - Jupiter: orbital period 11.862615 Earth years - Saturn: orbital period 29.447498 Earth years - Uranus: orbital period 84.016846 Earth years - Neptune: orbital period 164.79132 Earth years So if you were told someone were 1,000,000,000 seconds old, you should be able to say that they're 31.69 Earth-years old. If you're wondering why Pluto didn't make the cut, go watch [this youtube video](http://www.youtube.com/watch?v=Z_2gbGXzFbs). Some Rust topics you may want to read about while solving this problem: - Traits, both the From trait and implementing your own traits - Default method implementations for traits - Macros, the use of a macro could reduce boilerplate and increase readability for this exercise. For instance, [a macro can implement a trait for multiple types at once](https://stackoverflow.com/questions/39150216/implementing-a-trait-for-multiple-types-at-once), though it is fine to implement `years_during` in the Planet trait itself. A macro could define both the structs and their implementations. Info to get started with macros can be found at: - [The Macros chapter in The Rust Programming Language](https://doc.rust-lang.org/stable/book/ch19-06-macros.html) - [an older version of the Macros chapter with helpful detail](https://doc.rust-lang.org/1.30.0/book/first-edition/macros.html) - [Rust By Example](https://doc.rust-lang.org/stable/rust-by-example/macros.html) ## Source ### Created by - @IanWhitney ### Contributed to by - @ashleygwilliams - @bobahop - @coriolinus - @cwhakes - @durka - @eddyp - @efx - @ErikSchierboom - @IanWhitney - @joshgoebel - @lutostag - @nfiles - @ocstl - @petertseng - @rofrol - @stringparser - @xakon - @ZapAnton ### Based on Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. - http://pine.fm/LearnToProgram/?Chapter=01