[TOC] ### 使用Rust求兩個點之間的距離  #### 使用普通的方式 ```rust //求兩個點之間的距離 struct Point(f32, f32); fn distance(p1: Point, p2: Point) -> f32 { let dis = (p2.0 - p1.0) * (p2.0 - p1.0) + (p2.1 - p1.1) * (p2.1 - p1.1); dis.sqrt() } fn main() { let p1 = Point(0.0, 0.0); let p2 = Point(3.0, 4.0); println!("{}", distance(p1, p2)); } ``` #### 使用面向對象方式 ```rust //求兩個點之間的距離 struct Point(f32, f32); impl Point{ fn distance(&self,p:Point) -> f32 { let dis = (self.0 - p.0) * (self.0 - p.0) + (self.1 - p.1) * (self.1 - p.1); dis.sqrt() } } fn main() { let p1 = Point(0.0, 0.0); let p2 = Point(3.0, 4.0); //println!("{}", distance(p1, p2)); println!("{}", p2.distance(p1)); } ```