64 lines
1.3 KiB
Rust
64 lines
1.3 KiB
Rust
#[macro_use]
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extern crate scan_fmt;
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#[derive(Debug, PartialEq, Eq)]
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struct Moon {
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x: i32,
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y: i32,
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z: i32,
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x_vel: i32,
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y_vel: i32,
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z_vel: i32,
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}
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fn main() {
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println!("Hello, world!");
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}
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fn gcd(mut x: u32, mut y: u32) -> u32 {
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let mut remainder;
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while y != 0 {
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remainder = x % y;
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x = y;
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y = remainder;
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}
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x
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}
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fn lcm(x: u32, y: u32) -> u32 {
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x * y / gcd(x, y)
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}
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#[rustfmt::skip]
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fn parse(line: &str) -> Moon {
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let (x, y, z) = scan_fmt!(line, "<x={}, y={}, z={}>", i32, i32, i32).unwrap();
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Moon { x, y, z, x_vel: 0, y_vel: 0, z_vel: 0, }
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_gcd() {
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assert_eq!(gcd(20, 10), 10);
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assert_eq!(gcd(20, 15), 5);
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assert_eq!(gcd(15, 20), 5);
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}
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#[test]
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fn test_lcm() {
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assert_eq!(lcm(20, 10), 20);
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assert_eq!(lcm(3, 7), 21);
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assert_eq!(lcm(7, 3), 21);
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assert_eq!(lcm(lcm(7, 3), 5), 105);
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}
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#[test]
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#[rustfmt::skip]
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fn test_parse() {
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assert_eq!(parse("<x=-14, y=9, z=-4>"), Moon { x: -14, y: 9, z: -4, x_vel: 0, y_vel: 0, z_vel: 0 });
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assert_ne!(parse("<x=-14, y=9, z=-4>"), Moon { x: 14, y: 9, z: -4, x_vel: 0, y_vel: 0, z_vel: 0 });
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}
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}
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